MAX97003：高效低噪音频参考设计方案

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Realtek_HD声卡设置大全

如果出现的高清音频配置器不一样，那就换个驱动试一下。

一．首先调出Realtek HD音频管理器方法：进入控制面板，选择“声音、语音和音频设备”，再调出“Realtek高清晰音频配置”界面或从桌面右下角任务栏位置直接调出。

二．启用后置麦克风功能选择“混频器”，将“Rear Pink in”X选状态取消并将音量调到最大选择“混频器”，将“录制”旋转音量调到最大2.禁用前面板插孔检测功能。

方法：进入Realtek HD 音频管理器，选择“音频I/O”并点选管理面板右上“扳手图标”，在弹出界面中钩选“禁用前面板插孔检测”并单击“OK”键确认。

三,这个步骤特别重要，一定把混频器里面的选项按照我的方法调试。

不然不出声音。

四.释放HD声卡的音量，让你的耳机当音响用1.选择“音频I/O”，将“2CH喇叭”改为“8CH喇叭”这样做可以解决游戏内声音小的问题2.选择“音频I/O”，将后面板声音输出默认的“喇叭输出”改为“耳机”这步是整个HD声卡设置最关键的一步，一定不能忘。

集成声卡故障及解决方法随着主板集成度的逐步提高，集成声卡已经成为目前电脑的发展潮流，而且随着集成声卡芯片的技术提高，大有取独立声卡而代之的趋势。

根据通俗的分类，AC'97声卡被分为硬声卡和软声卡两种，其中AC'97硬声卡，首先大部分独立声卡都是硬声卡；而集成在主板上的声卡也有硬声卡：这些声卡除了包含有Audio Codec芯片之外，还在主板上集成了Digital Control芯片，即把芯片及辅助电路都集成到主板上。

这些声卡芯片提供了独立的数字音频处理单元和ADC与DAC的转换系统，最终输出模拟的声音信号。

这种硬声卡和普通独立声卡区别不大，更像是一种全部集成在主板上的独立声卡，而由于集成度的提高，CPU的负荷减轻，音质也有所提高，不过相应的成本也有所增加，现在已很少被主板厂商采用。

AC'97软声卡则仅在主板上集成Audio Codec，而Digital Control这部分则由CPU完全取代，节约了不少成本。

ANT8823 2×3W 3.7V THD+N=1%内置同步升压，防破音，AB D 类双模立体声音频

ANT8823产品手册特性●2×3W /3.7V THD+N=1%ALC ON ●高效同步升压●ALC 防破音控制●AB 类/D 类切换双模式●超低EMI 、超低底噪●优异的上、下电pop-click 噪声抑制●全差分电路结构，抗干扰能力强●3V~5V 单电源电压供电。

●过热保护，过流保护●eSOP16封装应用●便携式蓝牙音箱，WiFi 音箱●智能音箱●便携式扩音器订购信息概要ANT8823是一款内置高效同步升压的高信噪比，低底噪，具有ALC （防破音）功能的AB/D 类双模立体声音频功放。

在锂电池3.7V 供电时，驱动双通道4Ω负载可以输出2×3W 恒定功率。

当电池电压低于3.3V 时，芯片会主动降低功率，避免拉死电池。

特有的防破音功能能够确保输出的音频信号不会出现较大的失真。

在各种应用场合都可以提供高效稳定的输出功率。

ALC 功能能够自动检测输出失真，动态调整放大器增益，可以避免因为音乐等输入信号幅度过大，或者电池电压波动而引起的输出削顶失真，显著提高音乐品质并且可以提高听感。

AB 类工作模式，可以确保在带有收音机功能的应用中无任何干扰。

AB/D 类切换功能同IC 使能管脚复用，应用非常灵活。

同时，外置输入限流功能，可以完全解决应用中拉死电池的现象。

此外，ANT8823内置过流保护、过热保护功能，确保芯片在各种应用环境中的可靠性，稳定性。

典型应用电路引脚定义eSOP16（TOP VIEW ）引脚功能描述电气特性限定条件：（VDD＝3.7V，TA＝25℃）CTRL使能控制CTRL管脚为芯片使能控制以及模式选择管脚。

可以通过硬件分压设置不同的工作模式。

入下表所示：电平>2V音频打开，D类1.3V<电平<1.7V音频打开，AB类低电平音频关闭实际应用中可以通过两个GPIO口以及电阻网络设置。

如下图,PD与AB/D端口的电平值通过GPIO 接口设置为“H”（VIO）或者“L”（GND）。

低噪放设计

低噪声放大器设计报告学生姓名：李江江学号：201221040234 单位：物理电子学院一、技术指标：频率：5.25 GHz~5.55 GHz 噪声系数：小于0.5 dB (纯电路噪声系数不考虑连接损耗)增益：大于20dB 增益平坦度：每10MHZ带内小于0.1dB输入输出驻波比：小于2.0 输入输出阻抗：50二、理论分析低噪声放大器(LNA)在接收机系统中处于前端,主要作用是放大接收到的微弱信号,降低噪声干扰。

LNA的设计对整个接收机性能至关重要,其噪声系数(NF)直接反映接收机的灵敏度。

随着通讯、雷达技术的发展,对微波低噪声放大器也提出了更为严格的要求。

利用微波电路CAD设计软件,结合可靠的LNA设计理论来进行电路设计，可以避开复杂的理论计算,极大地提高设计准确性和效率，有效缩短研制周期,降低成本。

( A D S ) 软件是A g i l e n t 公司在H P E E S O F 系列E D A 软件基础上发展完善的大型综合设计软件，它功能强大，能够提供各种射频微波电路的仿真和优化设计，广泛应用于通信、航天等领域，是射频工程师的得力助手。

本文着重介绍如何使用ADS 进行低噪声放大器的仿真与优化设计。

LNA的性能指标主要是噪声系数、增益、工作频带、电压驻波比和带内平坦度等，尤其是噪声系数和增益对整机性能影响较大。

要实现理想功率传输，必须使负载阻抗与源阻抗相匹配,这就需要插入匹配网络。

放大管存在最佳源阻抗Zsop,t LNA的输入端应按Zsopt进行匹配,此时放大器的噪声系数为最小。

而为了获得较高的功率增益和较好的输出驻波比,输出端则采用输出共轭匹配。

如果增益不够，则需要采用多级放大电路。

原则上前级放大器相对注重噪声系数性能，后级放大器则相对注重增益性能。

也就是说，输出端口和级间针对增益最大和平坦度进行匹配电路设计。

LNA低噪声放大器的主要指标如下：1.工作频率与带宽2.噪声系数3.增益4.放大器的稳定性5.输入阻抗匹配6.端口驻波比和反射损耗三、设计过程：（1）直流分析晶体管S 参数的测量并确定工作点。

ArenaMatch Utility 小前景补声扬声器 AMU105 AMU108 AMU206

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铅
汞
(Pb) (Hg)
镉 ()
六价铬 (CR(VI))
多溴化联苯 (PBB)
印刷电路板 X
O
O
O
O
金属零件
X
O
O
O
O
塑料零件
O
O
O
O
O
扬声器
X
O
O
O
O
线缆
X
O
O
O
O
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包装清单................................................................................................................................................................................................... 5 可选配件................................................................................................................................................................................................... 5 检查和维护....................................................................................................................................................................................................... 6 保持防风雨性........................................................................................................................................................................................... 6 推荐使用的工具.............................................................................................................................................................................................. 6 产品尺寸........................................................................................................................................................................................................... 7 ArenaMatch Utility AMU105........................................................................................................................................................... 7 ArenaMatch Utility AMU108........................................................................................................................................................... 8 ArenaMatch Utility AMU206.......................................................................................................................................................... 9 ArenaMatch Utility AMU208........................................................................................................................................................ 10

欧胜发布用于便携式数字音频应用的超低功耗音频中心解决方案

小区的室内信号覆盖问题，解决了４９
个户弱覆盖以及２个用户对通话断３
目ＧＳＭ立体网络建设的实施
（）蜂窝层的规划和建设１宏
宏站天线挂高结合周围地势一般控制在３～４２于特殊区域以保证５０１，对１．覆盖为目标适当增加天线高度。为减少
同，充分利用其特点，在不同空间采
用不同的信号覆盖方式。空间分层覆盖技术如图２示。所
改善一定区域底层的覆盖质量。底层延
伸层中街道站等严格控制覆盖天线高度
（般控制在１～２Ｉ一５０１），并充分利Ｙ
（）内覆盖层的规划和建设３室室内覆盖层包含覆盖型及容量型室
内分布系统，在立体网络建设中重点是
团结束语
立体网是保证网络可持续发展的
调整，单站配置为３区为准。结合室扇
重要手段，是有效解决网络高话务和
频率干扰，宏站天线方位角尽量保持统
一
用周罔楼字的阻挡条件布设，从而提高频率复用度。通过底层延伸层的建
续、难打、掉话等网络质量方面的投诉，在话务量大幅上升的情况下，网
Ｔｃｎｃｌｒ出全新的低功耗ＶｏＰｅｈｉｏｏ推ｌ家庭网关

低噪放资料

低噪放培训材料1、低噪放的组成及其工作原理。

2、低噪放性能指标的分析。

3、典型低噪放电路图讲解。

4、电路的调试及维修。

1.1、低噪放的作用所谓低噪放就是噪声系数很低的放大器，它位于射频接收链路的第一级。

射频接收系统的一个基本设计目标就是要让整个接收链路的噪声系数最小。

而整个接收链路的很大基本由第一级放大器决定。

第一级放大器的噪声系数越小，增益越大则整个接收链路的噪声系数就越小。

而噪声系数的大小直接影响到接收机的灵敏度的好坏。

目前公司低噪放设计采取两种方案： 1、平衡式（早期）2、单链路式（降成本）模块类型： 1、单入单出 2、单入双出1.2、低噪放的组成部分该电路可划分为三个小单元:电源处理电路、CPU 处理电路、射频(RF)链路。

● 实现与上位机的RS485通信接口、输入信号功率检测、模块增益调节和自动电平控制(ALC)。

● 变频器的基本组成部分 ● 低噪放方框示意图：1.3、低噪声设计部分● 系统总的噪声系数可以通过单级噪声系数和增益计算。

● 根据噪声系数的级连公式：Fsys=F1+(F2-1)/G1+(F3-1)/G1G2+...(Fn-1)/G1G2...Gn-1(其中Fsys 为n 级串联成的系统的总噪声系数、Fn 为第n 级的噪声系数、Gn 为第n 级的增益。

)R F O U Td e t e c t o r由此可见，整个放大器的噪声系数主要由第一级和第二级所决定。

具有低噪声和高增益的第一级和第二级放大器的设计是整个低噪声放大器设计的难点。

所以，各类低噪放模块在第一级采用噪声系数好的放大器，ALC 限制必须放在第二级放大器后面.1.4、ALC 部分● 所谓的ALC 就是自动增益电平控制，是针对由于器件本身变化,环境引起工作点变化等,在电路中加入的稳定电平的电路.在一定范围内,ALC 电路自动纠正偏移的电平回到要求的数值。

● ALC 在低噪放上的应用：调整低噪声放大器的增益,在保证信噪比的情况下,自动调整接收通道的增益,使得在大信号电平环境下接收机不至于饱和造成性能下降,小信号的时候又能保证信噪比并能正确的解调。

ITC-会议系统设计方案说明书

—多媒体会议音视频系统—设计方案广州市保伦电子有限公司二〇一四年三月二十三日目录一、系统概述 (4)二、需求分析 (5)四、设计原则 (6)五、产品选型 (7)六、方案设计 (8)6.1报告厅 (8)6.1.1音响扩声系统 (9)6.1.2投影显示子系统 (11)6.1.3摄像跟踪系统和会场录播系统 (11)6.1.4中央控制系统 (12)6.1.5数字会议系统 (13)6.2大会议室 (15)6.2.1音响扩声系统 (15)6.2.1投影显示子系统 (16)6.2.2数字会议系统 (16)6.3视频会议室 (18)6.3.1音响扩声系统 (18)6.3.2投影显示子系统 (19)6.3.3摄像跟踪系统和会场录播系统 (20)6.3.4远程视频系统 (20)6.3.5中央控制系统 (20)6.3.6数字会议系统 (22)6.4影视厅 (24)6.4.1音响扩声系统 (24)6.4.2投影显示子系统 (24)6.4.3中央控制系统 (25)6.5数字影像展示厅 (26)6.5.1音响扩声系统 (27)6.5.2投影显示子系统 (27)6.5.3中央控制系统 (28)6.6办事窗口大厅 (29)6.6.1音响扩声系统 (29)6.7交易厅 (30)6.7.1音响扩声系统 (30)七、系统设备清单 (31)八、系统拓扑图 (31)九、主要设备介绍 (31)9.1扩声系统设备 (31)9.2会议系统设备 (54)9.3集中控制系统设备 (58)9.4远程会议视频系统设备 (73)十、工程案例介绍 (84)一、系统概述随着现代科技的发展及数字化技术的广泛应用，传统的会议模式已不能适应现代会议系统的需求。

先进的数字化的模块化的音视频会议系统顺应会议发展潮流，它克服了传统会议系统的不足，并以优异的性能使其在众多的国际会议和高层会谈上得到广泛应用。

特别是近几年来，可视化信息技术在信息资源的主要交流场所—多媒体会议室中得到了广泛的应用。

迈克罗纳 DX2000USB 专业级7通道低噪声DJ混音器说明书

DX2000USBProfessional, 7-channel, ultra-low noise DJ mixer with state-of-the-art phono preamps45-mm infi nium “contact-free” optical crossfader with adjustable friction for years of use 5 dual stereo inputs plus 2 mono mic/line channels with ULN mic preamps, Phantom Power, Gain control and Clip LED Built-in USB interface for recording and playback of any digital music fi le. Works with your PC or Mac computer— no setup or drivers requiredMassive software bundle including Audacity vinyl restoration and recording, Podifi er and Golden Ear podcasting software downloadable at Ultra-musical 3-band kill EQ (-32 dB) with EQ on/off switch on all stereo channelsLong-wearing 100-mm faders and sealed rotary controls on all input channelsHeadphone output with Level and Balance (PFL/Main) controls, switchable split mode and level displayAuto-talkover function with separate Sensitivity, Time and Damping controlsMain Dim, main Boost, Punch and Cut functions for awesome mix optionsThese days a DJ gig can command a lot more than a mic and a couple of turntables. You may need toaccommodate a multimedia presentation, a variety of audio platforms (vinyl, CDs, mp3) and multiple mics—all at the same event! That’s why BEHRINGER is proud to present the 7-channel, rack-mountable DX2000USB with its built-in USB/audio interface and contact-free optical crossfader—an invaluable tool for the DJ-of-all-trades.The inclusion of the X1 opticalcrossfader in the DX2000USB represents tremendous added value. The “feel” of this crossfader can be custom-tailored to accommodate your individual mixing style, and the contact-free technology means silky-smooth performance for many years to come. We off er the X1 as a premium upgrade for our DDM4000 digital DJ mixers at $74.99 USD, but it comes standard with the DX2000USB at no additional cost. Please visit our website to fi nd out more about the X1 optical fader.Live Large With More Mediums!If it can be clicked, spun or spoken, the new DX2000USB can mix it! You get 5 dual stereo inputs plus 2 mono mic/line channels with ultra low-noise mic preamps, Phantom Power, Gain control andClip LED. The DX2000USB also has enough built-in phono preamps to handle up to three turntables. Finally, the built-in USB/audio interface gives you the power to add your computer’s digital music library to the mix. Hey, we even include the rack-ears, so you’re ready-to-go right out of the box!Old-school feel,new-school performanceThe DX2000USB is packed with cutting- edge versatility, but we didn’t lose sight of the basic features that make a DJ mixer a lasting part of your rig. This new breed of DJ mixer features super-smooth, long-wearing 100 mm faders and the infi nium optical contact-free crossfader forProfessional 7-Channel DJ Mixer with infi nium “Contact-Free” VCACrossfader and USB/Audio InterfaceContinued on next pagePRO MIXER DX 2000USBDJ Mixersutmost reliability and smooth audio performance. It is important to note that since this premium crossfader iscontact-free, there is none of the typically “wear and tear” that plagues mechanical faders, so your crossfades are always fl awless—and will be for years to come. The DX2000USB comes armed with a switchable 3-band kill EQ and Gain control per stereo channel.Mono channels feature an additional Low Cut switch and an FX switch that routes the channel to the FX SEND and RETURN loop, so you can add a touch of outboard eff ects. These channels feature balanced XLR mic inputs, as well as ¼ " line jacks, a Channel On button and aPFL switch for headphone monitoring. The handy Talkover button allows you to make announcements without killing the music via three adjustable parameters, Sensitivity (speech level threshold), Time (speed at which the music level returns to normal) and Damping (depth the music is attenuated by the mic signal).For the DJ in need of mammoth bass, the DX2000USB features an XLR subwoofer output (perfect for connecting to an active subwoofer) with adjustable (30 - 200Hz) Crossover Frequency dial and Level control.Directly above, the DX2000USB provides a ¼" main mono ouput for synching your music’s strongest pulses with aSubbass Out for separate subwoofer, additional Zone output for second room/area“Planet Earth” switching power supply for maximum fl exibility (100 - 240 V~), noise-free audio, superior transient response plus low power consumption for energy savingRack mount brackets included for ultimate fl exibility High-quality components and exceptionally rugged construction ensure long lifeConceived and designed by BEHRINGER GermanyContinued on next pageTRS ZONE outputs Main XLR outputs Ground lugs for turntablesRCA LINE inputs Built-in USB audio interfaceRCA RECORD OUT jacks TRS monitor outputsLINE/PHONO button optimizes PHONO/LINE jacks for use with turntable o r C D p layerTRS LINE INPHONO/LINE RCA inputsLEVEL knob adjusts output of SUB BASS OUT jack for use with subwooferCROSSOVERFREQUENCY knobadjusts frequency of low pass fi lter for use with subwooferFX SEND/RETURN jacksXLR monitoroutputs IEC Power socket and on/off switch TRS REMOTE CONTROL jackCD RCA inputs TRS LINE inputs Stereo Main Insert Balanced/Unbalanced mono output to external lighting controllerXLR MIC INlighting system, provided your lighting system has “sound-to-light” capability(e.g. BEHRINGER LC2412 Lighting Console). The Main Output section off ers balanced ¼" TRS and XLR stereo outputs, as well as ¼ " TRS Main Insert jacks for connecting to outboard EQ and dynamics processors, such as limiters and compressors. This section also features RCA outputs for recording your set. The Monitor/Zone Output sectiongives you separate stereo ¼ " and XLR monitor outputs, as well as ¼ " stereo zone outputs, each with their own dedicated level controls. This feature gives the DX2000USB incredible zone mixing versatility, allowing you to send output signals to a variety of destinations, such as the lobby, restaurant or waiting areas, all the while maintaining total control.Transforming with Punch and Cut Transforming is a DJ term used to describe the chopping up of sound to create some rather dramatic eff ects. Traditionally this is done by rapidlymoving a crossfader to give a stuttering or “gated” eff ect, either between twomusic sources, or one source andsilence. Another DJ trick is to use the channel faders, or channel on buttons, to chop one music track over another. These methods are still valid, but if you’re looking for instant gratifi cation, check out our ergonomic alternative— a pair of big assignable non-latching PUNCH/CUT buttons. We’re sure you will grow to love their speed and ease of operation.The Punch and Cut modes are available via the TRANSFORM MODE button, with a pair of LEDs that let you know which function is active. The X and Y Punch/Cut buttons are conveniently located right next to the crossfader with which they are designed to work.INPUTbutton selects channel’s audio sourceLOW CUT button removes unwanted low frequencies EQ knobs PAN knobpositions channel in stereo fi eld TALKOVER button CHANNEL ON sends channel to PFL bus CROSSFADER button routes signal to crossfader CHANNEL fader adjusts channel volume ASSIGN button assigns active channel to X or Y side of crossfaderGainFX button routes channel to FX SEND and RETURN loopCD/PHONO input selectorDAMPING adjusts music level reduction when talkover is engaged TIME knob adjusts howquickly the music volume recovers after talkover has been engagedSENSITIVITYknob adjusts how loud mic signal must be to engage talkover LEVEL METER displays left and right MAIN signal, PFL signal levelLIGHT LEVEL adjusts output level of mono LIGHT OUTPUTZONE LEVEL adjusts output of ZONE OUTPUTS FX RETURN MAIN/PFL selects main stereo mix or PFL mix for phones PHONES LEVEL BALANCE adjusts blend of PFL and main signals in headphones MONITOR fader adjusts output of MONITOR OUTPUTSMAIN fadersinfi nium optical X/Y CROSSFADERPUNCH/CUT buttonsMAIN DIM button reduces the main mix by -20 dBMAIN BOOST raises the main mix by +4 dBTRACK START button allows remote control of commercial playback decks via built-in remote jacksTRANSFORM MODE determines whether PUNCH/CUT buttons operate in CUT or PUNCH modeEQ ON Continued on next pageCUT mode enables the big buttons to be used as mutes for interesting gating eff ects, temporarily silencing the X or Y output.In PUNCH mode the X button introduces the X signal to the mix, while the Y button brings in the Y signal. This means you can add in bits and beats from X on top of Y and vice versa, opening up your scope to extremely creative mixing.MAIN DIM and MAIN BOOSTYou can add even more dramatic eff ects by using the MAIN BOOST and MAIN DIM buttons for a temporaryboost (+4 dB) or cut (-20 dB) of the main output volume. For instance, you could use MAIN DIM for audience sing-along bits—or you could use MAIN BOOST to emphasize beats, a special musical passage, etc.Remote ControlIf you use external audio devices, such as CD players, CART machines, etc.,in the course of your performance, you’ll be pleasantly surprised by DX2000USB’s remote control feature. Many commercial playback decks off er remote start and stop functionality. If your player supports this feature (please check your device’s owner’s manual), you can use DX2000USB’s TRACK START buttons, conveniently located below the faders on channels 3-7, to control up to three similarly equipped devices. This may seem like a minor detail, but it can become a major hassle when you’re trying to produce the perfect show!B212D Active PA LoudspeakersFEX800 FX ProcessorXM8500Dynamic MicsB315D Active PA LoudspeakersHPX4000DJ HeadphonesB1800D-PRO Active Subwoofer CD PlayerTurntableFX2000Digital Effects ProcessorLaptopComplete Mobile DJ SystemContinued on next pageSuper SoftwareYou get incredible multitracking software and more when you hook up with the DX2000USB. This amazing DAW (digital audio workstation) makes it easy to manipulate your audio and MIDI fi les, turning song ideas into stunning CD or web-ready recordings. There’s even a built-in drum machine and internal multi-FX processor. If you want toincorporate sounds from old, damaged vinyl, the included Audacity freeware audio editor with vinyl restoration capability will remove pops and othernoise. You even get Golden Ear and Podifi er software so you can instantly share your creations via podcast.ValueWhen you add the DX2000USB to your rig, you connect to unrivaled versatility and performance at a price that will leave you with cash to spare. Its superior build quality and rugged components mean this mixer will serve you well for years to come. Drop in at your nearest BEHRINGER dealer and fi nd out why so many DJs are making magic with BEHRINGER.XL3200Live MixerB212D Active PA LoudspeakersXM8500Dynamic MicsHPX4000DJ HeadphonesCD Player FX2000Digital Effects ProcessorTurntableLaptopMP3playerSimple Setup with Club PA SystemFor service, support or more information contact the BEHRINGER location nearest you:EuropeMUSIC Group Services EU GmbHTel.: +49 2154 9206 4149 / Fax: +49 2154 9206 4199USA/Canada MUSIC Group Services US Inc.Tel.: +1 425 672 0816 / Fax: +1 425 673 7647SingaporeMUSIC Group Services SG (Pte.) LtdTel.: +65 6845 1800 / Fax: +65 6214 0275AustraliaMUSIC Group Services AU Pty LtdTel.: +61 03 9877 7170 / Fax: +61 03 9877 7870JapanMUSIC Group Services JP K.K.Tel.: +81 3 5281 1180 / Fax: +81 3 5281 1181TECHNICAL SPECIFICATIONS AND APPEARANCES ARE SUBJECT TO CHANGE WITHOUT NOTICE AND ACCURACY IS NOT GUARANTEED. BEHRINGER IS PART OF THE MUSIC GROUP (MUSIC-GROUP .COM). ALL TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS.MUSIC GROUP ACCEPTS NO LIABILITY FOR ANY LOSS WHICH MAY BE SUFFERED BY ANY PERSON WHO RELIES EITHER WHOLLY OR IN PART UPON ANY DESCRIPTION, PHOTOGRAPH OR STATEMENT CONTAINED HEREIN. COLORS AND SPECIFICATIONS MAY VARY FROM ACTUAL PRODUCT. MUSIC GROUP PRODUCTS ARE SOLD THROUGH AUTHORIZED FULFILLERS AND RESELLERS ONLY. ALL RIGHTS RESERVED. © 2011 MUSIC Group IP Ltd. Trident Chambers, Wickhams Cay, P .O. Box 146, Road Town, Tortola, British Virgin Islands. 985-10000-00466Specifi cationsMono Input ChannelsMic input Electronically balanced, discrete input confi guration Gain+10 to +60 dBFrequency response 10 Hz to 80 kHz, +/-3 dB THD0.08 % typ. @ -30 dBu, 1 kHzLine inputGain-10 to +40 dBFrequency response 10 Hz to 80 kHz, +/-3 dB THD 0.08 % typ. @ -10 dBu, 1 kHz S/N ratio85 dB, unweightedEQLow +/-12 dB @ 50 Hz Mid +/-8 dB @ 750 Hz High +/-12 dB @ 10 kHz Low cut75 Hz, 18 dB/octStereo Input ChannelsPhone/Line/CD input Unbalanced input GainLine/CD +17/-20 dBPhone +17/-20 dBFrequency response Line/CD 10 Hz to 130 kHz, +/-3 dB Phone 20 Hz to 20 kHz, RIAA THD Line/CD 0.05 % typ @ 0 dBu, 1 kHz Phone 0.1 % typ @ -40 dB, 1 kHz S/N ratio Line/CD -82 dB, unweighted Phone -78 dB, unweighted Kill EQ Low +6/-25 dB @ 50 Hz Mid +6/************High+6/-18 dB @ 15 kHzConnectorsMaster outJack 0 dBXLR +6 dB Monitor out Jack 0 dB (max.10 dB gain)Zone out Jack 0 dB (max.10 dB gain)Insert send 0 dB Insert return 0 dB Eﬀ ect send 0 dBUSBAudio Stereo In/Out Connector Type B Sample rate48 kHzPower SupplyMains Voltages USA/Canada 120 V ~, 60 H UK/Australia 240 V ~, 50 Hz Europe230 V ~, 50 HzGeneral Export Model 100 - 120 V ~, 200 - 240 V ~,50 - 60 HzPhysicalDimensions (Hx W x D) 6.29 x 13.38 x 17.32"160 x 340 x 440 mm Weight 14.77 lbs / 6.7 kgPlease note these specifications are preliminary and conceptual in nature, and as such are subject to change as product development progresses. This information is supplied for market research purposes only and is not to be made public in any manner. This document is solely the property of The MUSIC Group, or one of its subsidiaries, and must be surrendered upon request of the owner.DX2000USB。

用于便携式产品的低成本音频方案(全文)

用于便携式产品的低成本音频方案(全文)音频放大器是便携式产品（PDA、手机、笔记本电脑、PVR等）中必不可少的处理电路，随着这些产品日益多功能化和小型化，传统的多片解决方案已不能满足小尺寸的需求，此外，生产厂商也日益注重产品的音频品质以迎合消费者的需求。

本文介绍的一款单片音频放大器MAX9765，在不增加成本的基础上，既解决了PCB板的尺寸问题，又提高了便携式设备的音频品质。

1MAX9765的主要结构性能MAX9765将扬声器、耳机和麦克风放大器集成于一片细小的QFN 封装内。

该芯片内部包含了立体声BTL扬声器功放、立体声耳机放大器、单端麦克风放大器、输入复用器以及I2CTM控制接口，其应用对象是含有立体声扬声器的音频回放设备。

图1所示是MAX9765的内部电路结构。

由图可见：该音频放大器包含了便携式产品所要求的全部相关功能。

在扬声器模式下，该放大器能向4Ω的负载持续提供高达750mW的平均功率。

而在耳机模式下，MAX9765放大器则能向16Ω的负载持续提供高达65mW的平均功率。

由于MAX9765的增益可在外部设定，因而可提供最大限度的灵活性，并可使系统根据给定负载得到最佳的输出电平。

此外，由于2路750mW功放支持BLT桥接的扬声器驱动，因而还可省去两个体积庞大的隔直电容器，同时也提高了输出功率。

耳机接入电路可自动检测耳机插入。

MAX9765带有两路MIC放大，其中差动放大方式可大大抑制机内噪声影响，同时也使PCB布线更加灵活；串行I2C控制总线节省了MCU I／O资源；其5mm×5mm×0．8mm的小型QFN封装可使音频放大电路占用的PCB 面积达到最小。

MAX9765还具有一个2:1的输入复用器，可实现多音频源之间的选择切换。

2MAX9765的参数曲线和应用电路输入输出的音频品质是MAX9765追求的另一指标,影响该指标的因素主要是失真度(THD＋N)。

当然，其它指标譬如PSRR(电源电压抑制比)、CMRR(共模输入电压抑制比)等也会影响音质。

优美声4100音质方案

优美声4100音质方案介绍优美声4100音质方案是一种专为音频设备设计的高品质音频处理方案。

该方案旨在提供优秀的音质表现和卓越的音频体验。

本文档将深入介绍优美声4100音质方案的原理和优势，并提供配置和使用方面的详细指南。

方案原理优美声4100音质方案基于数字信号处理技术，利用先进的算法和滤波器对音频信号进行处理和增强。

方案的原理可以简单概括为以下几个关键步骤：1.音频采样与转换：方案首先对音频信号进行采样和模数转换，将模拟音频信号转换为数字信号以便后续处理。

2.数字信号处理：采样和转换后的数字信号将通过一系列数字信号处理算法和滤波器进行处理。

这些算法和滤波器可以自动调整音频信号的频率、相位和幅度，从而提升音质并改善音频细节。

3.声音增强：方案还包括一些声音增强技术，如立体声扩展和环绕声效果。

这些技术可以增强音频的空间感，营造出更加沉浸式的音频体验。

4.输出处理：处理后的音频信号将被重新转换为模拟信号，并通过音频输出设备进行输出。

输出设备可以是耳机、扬声器或其他音频播放设备，它们将再次对音频信号进行放大和输出。

优势使用优美声4100音质方案带来以下几个显著优势：•卓越音质: 优美声4100音质方案通过有效的信号处理和增强技术显著提升音频的清晰度和细节，使用户能够享受更加真实和沉浸式的音频体验。

•增强的音频效果: 该方案还提供一些声音增强功能，如立体声扩展和环绕声效果，使音频具有更好的空间感，让用户沉浸其中。

•广泛兼容性: 优美声4100音质方案可以与各种音频设备兼容，包括手机、电脑、音乐播放器等。

用户可以在不同的设备上享受一致的高品质音频。

•易于配置和使用: 用户可以通过简单的设置调整优美声4100音质方案的参数，以满足个人偏好和不同音频内容的需求。

使用方便，即插即用。

配置指南以下是配置优美声4100音质方案的简单步骤：1.第一步是确保您的音频设备已正确连接并启动。

2.进入音频设备的设置菜单，找到“音效”或“声音”选项。

Tannoy VQ NET 100 三合一扬声器系统说明书

Tannoy United Kingdom T: 00 44 (0) 1236 420199The VQ NET 100 is a full range, three-way loudspeaker system designed for applications which require high output capability with class leading pattern control. Integrated with cutting edge digital signal processing, network control and dual channel Class D amplification, the VQ 100 features a wide and exceptionally well defined dispersion characteristic.For a variety of uses, a single VQ NET 100 can produce more power and clarity over its 100 degree beamwidth area than many arrayed solutions using multiple cabinets, a great advantage when considering your building aesthetics.With low frequency extension to 90 Hz, the VQ NET 100 can be combined with various subwoofers for extended bandwidth.Horn design involves balancing compromise…..until now.Our unique approach in keeping what is effectively a Dual Concentric™ behind a single horn gives us many performance advantages. Performance of the VQ NET 100 in terms of accuracy & sound quality is second to none.The VQ NET 100 incorporates a unique driver technology to radiate a coherent single point source for superior dispersion control when coupled to a PSW™ (Point Source Waveguide). This advanced design aligns the acoustical centres of the transducers providing a single coherent wavefront emanating from the throat. The PSW™ waveguide achieves an optimum balance of extremely well controlled coverage, smooth frequency response, and natural sound character. The low frequency section, two (12”) low frequency transducers, offers high power handling and low power compression for high continuous SPL capability. A newly designed LF loading design provides the highest possible sensitivity for low/mid frequency output.The modular approach of amplifiers, processing, monitoring and drivers designed into eachloudspeaker enables acoustic optimization for the speaker to perform as a unified whole. The intu-itive setup software, integrated processing, tuning control, performance diagnostics and protection produces an easy to install and exceptionally high performance networkable loudspeaker. VNET™supports free network topology so that the loudspeakers can be arranged in a daisy chain, linked in a star configuration or in any combination of both. Implementation of the network between nodes is via high quality rugged Neutrik Ethercon connectors, which are compatible with standard RJ45plugs, and CAT5 cable. Each speaker has a unique address for auto-location on the network.System commissioning and ongoing venue network control, incorporating real time diagnostics of electronics and drive unit, are all managed by the exclusive VNET™software package. Supplied with each unit, this intuitive Windows tool controls all of the critical install, commissioning and performance monitoring functions. A standard wireless LAN-to-serial bridge can also be used to communicate with the network.The VQ NET 100 is part of an expanding line up of VQ products, addressing the requirement for compact dimensions without compromising performance in any way.Product Description•“PSW™ Waveguide” - Point source design (Patent applied for).•Excellent Phase Coherence•Perfect time alignment without the associated problems of multi source interference •Compact Dimensions•Class leading directivity characteristics •High SPL capability•Exceptional transient response•Large Houses of Worship•Large Corporate AV applications •Stadiums & other Sports facilities •Dance Clubs•Live sound – concert halls, theatres, open-air venuesFeaturesAn RS485 interface is used for the serial data, with a twisted pair to send and receive information to a high number of nodes over very long distances. Operating a shared bus system, so that a single computer can control any node on that bus, also means that status information can be gathered from any of the devices. The RS-485 differential signal is very robust, while its noise immunity and long-distance capability ensure it is one of the most popular communications methods used in industry.Only data to control setup functions and ongoing system diagnostics is carried over the network. As each VNET™ loudspeaker controls its own DSP functions any unforeseen problem would be isolated to only that particular node and audio will still be delivered.Speakers are automatically identified on the network software set up screen with factory default names. The name can be edited to reflect their actual location on the network, withphysical location confirmation by selecting the ‘Flash’ function to activate an LED mounted on the front of the loudspeaker.The loudspeakers are fully calibrated at the factory, avoiding the need to input the correct speaker management settings or any dynamics at the point of install.FeaturesApplicationsTannoy United Kingdom T: 00 44 (0) 1236 420199E:********************TECHNICAL SPECIFICATIONSSystem Type3-Way Full Range - Point Source Frequency Response (-3dB) (1)115Hz - 23kHz Frequency Range (-10dB) (1)90Hz - 27kHz Dispersion (-6dB)100 degrees conicalDriver Complement LF 2 x 300mm (12.00”) LowFrequency Transducers, Semi Horn LoadedMF/HFDual Concentric™ Compression driver loaded into a single PSW™ Waveguide Crossover450Hz (DSP Generated)7kHz (passive)Directivity Factor (Q)8.5 averaged 1kHz to 10kHz Directivity Index (DI)9.3 averaged 1kHz to 10kHz Rated Maximum SPL (2)Average Peak Low Frequency 134dB 140dB Passive MF/HF134dB140dBConstructionEnclosure18mm (0.71") birch plywood. Vented and internally braced.Grille Powder coated perforated steel grilleFinish Black or white textured paint (custom colours on request)Connectors1 x female XLR (input)1 x male XLR (link)1 x RJ45 (network in)1x RJ45 (network link)1 x Neutrik PowerconControls & IndicatorsLED on front of cabinet behind grille. (wink indicator for locating & assigning)Power LED (blue)Signal LED (green)Limit LED (red)User DSP - defeat switch Power switchFittings 8 x Recessed carrying handles 12 x M10 flying inserts Dimensions 925mm x 694mm x 515mm (36.42" x 27.32" x 20.28")NET Weight68kgSystemPART NUMBERMODEL NAMECOLOURPACKED QUANTITY8001 4850VQ NET 100BLACK 1Ordering InformationElectronicsEfficiency>85% typically Damping Factor 120 ref 8 OhmsDistortion<0.05% @ 1kHz -3dB output (22kHz bandwidth)Input Impedance 5.6 kOhms unbalanced,11.2 kOhms balancedOutput Power (Programme)LF - 800WMF/HF - 800W (limited to 400W)Input Sensitivity 1.4V (+5.5dBu)System Type Dual channel Class DDSP systemComms Facilities Firmware updatable and selected parameters editableCommunications Serial - RS485 Proprietary message format Dynamic Range 112dB(A) typicalDSP3rd generation SHARCSampling Frequency 96kHz 24 bit A/D-D/A word length Format1 IN -2 OUTPSU SpecificationsInput Connector Locking Neutrik PowerconVoltage Selection Automatic (115 / 230V, 45 - 65Hz)TypeHigh current, high frequency switch mode Efficiency >90% typicalInput voltage 100V / 115V / 230V nominal +/-10%Mains fuse External Fuse typeT10ATOther features Automatic soft start Current Draw 115V 230V Startup (inrush) 3.5A 1.9A idle 1.1A 0.56A Max3.5A 1.7ANotes:(1) Average over stated bandwidth. Measured at 3 metres on axis, then referred to 1 metre (2) Unweighted pink noise input, measured at 3 metres in an anechoic chamber, then referred to 1 metreA full range of measurements, performance data, CLF and Ease™ Data can be downloaded from Tannoy operates a policy of continuous research and development. The introduction of new materials or manufacturing methods will always equal or exceed the published specifications, which Tannoy reserves the right to alter without priornotice. Please verify the latest specifications when dealing with critical applications.Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************HORIZONTAL OFF AXIS RESPONSEVERTICAL UPPER OFF AXIS RESPONSEFrequency ResponseFrequency Response - Horizontal Off-axisfrequency (Hz)L e v e l , (d B )L e v e l (d B )Frequency Response - Upper Vertical Off-axisfrequency (Hz)101001000100001000001010010001000010000010-10-20-30-40L e v e l , (d B )ANECHOIC FREQUENCY RESPONSE1010010001000010000010100100010000100000frequency (Hz)10-10-20-30-4010-10-20-30-400 deg 10 deg 20 deg 30 deg 40 deg0 deg 10 deg 20 deg 30 deg 40 degTannoy United Kingdom T: 00 44 (0) 1236 420199E:********************VERTICAL LOWER OFF AXIS RESPONSEBEAMWIDTHFrequency Response - Lower Vertical Off-axisfrequency (Hz)Q VS FREQUENCYL e v e l , (d B )1010010001000010000010-10-20-30-40Beamwidth vs FrequencyD e g r e e s1001000100003603303002702402101801501209060300frequency (Hz)frequency (Hz)Q vs FrequencyQ 1001011001000100000 deg 10 deg 20 deg 30 deg 40 degDIRECTIVITY INDEXfrequency (Hz)DI vs Frequency100100010000 2015105DITannoy United Kingdom T: 00 44 (0) 1236 420199E:********************Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************-48-36-24-120100 Hz 125 Hz 160 Hz 200 Hz-48-36-24-120250 Hz 315 Hz 400 Hz 500 Hz-48-36-24-120-48-36-24-120-48-36-24-120-48-36-24-120630 Hz 1.6 kHz 4 kHz 5 kHz 6.3 kHz 8 kHz10 kHz 12.5 kHz 16 kHz 20 kHz2 kHz 2.5 kHz 3.15 kHz800 Hz 1 kHz 1.25 kHz330300306027090330300270306090330300270306090330300270306090330300270306090330300270306090Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************-48-36-24-120-48-36-24-120-48-36-24-120-48-36-24-120-48-36-24-1204 kHz 5 kHz 6.3 kHz 8 kHz10 kHz 12.5 kHz 16 kHz 20 kHz1.6 kHz2.5 kHz3.15 kHz100 Hz 125 Hz 160 Hz 200 Hz250 Hz 315 Hz 400 Hz 500 Hz2 kHz 630 Hz 800 Hz 1 kHz 1.25 kHz330300270306090330300270306090330300270609033030027030609027060903003303003060902703303030-48-36-24-12VNET SOFTWAREVNET™ SOFTWARE_The loudspeakers are fully calibrated at the factory, avoiding the need to in put the correct speaker management settings or dynamics at the point of install. This frees the installer to concentrate insteadon room measurement and system optimisation. System commissioning and ongoing venue network control, incorporating real time diagnostics of electronics and drive unit, are all managed by the exclusive VNET™ software package. Supplied with each unit, this intuitive Windows tool controls all of the critical install, commissioning and performance monitoring functions. A standard wirelessLAN-to-serial bridge can be used to communicate with the network, allowing the commissioning engineer to sit in the auditorium communicating from a laptop on 802.11bMONITORING & TELEMETRY FUNCTIONS_During normal operation the speakers on the network will appear as minimised panels in the form of a status monitor icon (Monicon) on the computer screen. These are laid out to reflect the physical layoutof the speakers within the venue so that the user can monitor system status and component conditionat a glance. The minimised panels can be expanded to reveal highly detailed information in real time:•Input clip indicator•Two output limiter bar graph meter•Heat sink temperature bar graph meter•Amplifier clip indicators (HF & LF on full range units)•Transducer Failure Indicators (HF & LF on full range units)•Amplifier protect status indicatorVNET™ Software FeaturesThe on-screen control panel for each device in the network has a properties tab consisting of the following:•Model Name is factory set with product model name•Network Handle (read only) is a numerical value set at the time of manufacture to uniquely identify the device on the network•Device Name is the specific user defined name, such as ‘Stage.Left’ or ‘Delay 1’•Firmware Version (read only) is a numerical value of firmware version running in the device •Configuration Name is the 12 character name the user can define to describe the current settings (such as ‘Live Mode’)•Current ‘Voice’ profile indication (read only) is a numerical value indicating the current speaker ‘voicing’ profile (the factory set equalization, crossover, & dynamics functions)•Software file loader in VNET™ allows a future modification to the software to be uploaded, such as a ‘voicing’ change or revised control software with new features•Record of any temperature or current shutdowns•Record of the number of power cycles•Rolling four day bar graphs recording amplifier temperature and any dynamics appliedSignal Processing•Gain Section: input gain fader with edit box (-30 to +15dB in 0.2dB steps)•Input Mute: On, Off•High-Pass Filter section: frequency spin / edit box and shape drop-down box•Low-Pass Filter Section: frequency spin / edit box and shape drop-down box•Equaliser Section: high resolution input EQ curve display•Low Shelf Band: frequency spin / edit box, slope spin / edit box and boost-cut / edit box•High Shelf Band: frequency spin / edit box, slope spin / edit box and boost-cut / edit box•Parametric EQ Bands (x 8): frequency spin / edit box, slope spin / edit box and boost-cut / edit box •Delay Section: delay spin / edit box (up to 180ms)Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************DIMENSIONAL SKETCHESVQ Net-100694.0[27.32"]528.5[20.81"]90.0[3.54"]43.0[1.69"]882.0 [34.72"]925.0[36.42"]515.0[20.28"]472.0[18.58"]694.0mm (27.32")925.0mm (36.42”)INPUT PANEL515.0mm(20.28”)882.0mm (34.72”)43.0mm (1.69”)528.5mm (20.81”)90.0mm (3.54”)472.0mm (18.58”)Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************OPTIONAL ACCESSORIESOrdering Information5470 0220VQ Flying Bracket (Single Point Hanging Bracket)BLACK 15470 0221VQ Link (Link Plate)BLACK 15470 0223VQ Rod EndBLACK 18001 2820VEB Forged Eyebolt-1PACKED QUANTITYCOLOUR MODEL NAMEPART NUMBER VQ FLYING BRACKET(SINGLE POINT HANGING BRACKET)VQ LINK (LINK PLATE)VQ ROD END VEB FORGED EYEBOLTTannoy United Kingdom T: 00 44 (0) 1236 420199E:********************VNET SC1 CONTROLLERPOWER INLETThe processor has a switch mode power supply that is capable ofoperating with a nominal mains voltage of 85V to 240V, 50/60Hz without re-configuration.V NET ™NETWORK PORTSThe network enabled V NET SC1controller features two network ports for connection to any V NET ™ system.COMMUNICATIONS PORT CONNECTORTannoy V NET SC1processors may be controlled entirely from a PCrunning V NET ™ software using this RS232 serial port connector. This port is also used for updating the firmware in the unit.SECURE MODE SWITCHA momentary button is fitted behind the rear panel, between the output XLRs and the RS232 port. When activated, this will disable all the front panel controls so they cannot affect the signal path, making the unit secure against tampering.AUDIO OUTPUT CONNECTORSThe processed outputs are impedance balanced. AUDIO INPUT CONNECTORSAll audio connections are fully balanced.Rear PanelV NET SC1ControllerV NET SC1Controller (network enabled)1011121314151234567891011121314151INPUT SIGNAL INDICATORSA set of three pairs of LEDs indicate signal present, +4dBu and input clip for each channel.STORE BUTTONThe unit has 45 preset locations.RECALL BUTTONTo recall a preset, press the recall button and use parameter knob A to select the required preset.CHANNEL SELECT BUTTONSThe currently selected input or output channel is shown in the top left corner of the display. Pressing the channel select buttons scrolls through the available inputs and outputs.EDIT PARAMETER SELECT BUTTONThe name of the edit parameter page is displayed in the bottom left portion of the LCD. DISPLAY SCREENPreset, channel, parameter and status information is shown on the 2x 24-character text display. In most screens the currently selected channel is displayed being the upper line and the edit parameter on the lower line.PARAMETER EDIT ENCODERSThree velocity sensitive parameter knobs are used to adjust parameters shown on the display. Up to three parameters at a time are displayed on the screen.LIMITER INDICATORTwo LEDs are provided for each output channel.MUTE BUTTONSEach output has a mute button and associated mute status LED.Front Panel35798642Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************OPTIONAL V NET TM USB AND RS232 INTERFACEThe rack-mountable V NET TM interface allows for communication between a V NET TM network and computer.If communicating with a non-networked SC1direct communication via the PC & SC1can be made with a standard serial lead, or USB-RS232 cable.OPTIONAL V NET TM ACCESSORY POWER SUPPLYThe PSU is only required when communication with a V NET TM network is by RS232.OPTIONAL RACK MOUNT KITThis 1U bracket allows you to rack mount up to three V NET TM interface accessories in a standard 19" equipment rack.8001 4450V NET TM USB / RS 232 Interface Black 10.75 (1.65lb)8001 4460V NET TM Power Supply Interface Black 10.75 (1.65lb)8001 4470V NET TM Interface 1U rack mount kitBlack10.75 (1.65lb)PACKED QUANTITYBAFFLE / GRILLECOLOURPACKED WEIGHT MODEL NAMEPART NUMBER Ordering InformationArchitectural specificationsThe loudspeaker shall consist of a Dual Concentric™ Neodymium Compression driver with a 3.5” Midrange voice coil and a 2” High Frequency voice coil, both mounted in a common subsystem with a common 1.4” exit. This Dual Concentric™ compression driver shall be coupled to a PSW™ (Point Source Waveguide) constant directivity horn operating over the frequency range of 450Hz to 23kHz. The low frequency section consists of two 12” (300mm) woofers, and shall be mounted in a semi-horn loaded enclosure to provide significant off axis attenuation below 450Hz.The low and Mid/High frequency elements shall be driven by an integrated dual channel Class D amplifier through a DSP generated crossover. The loudspeaker shall have user configurable DSP functionality. A variable high pass filter shall be provided for use with subwoofers.Performance of the loudspeaker, using the recommended electronic control shall meet or exceed the following criteria:The Low Frequency section shall be capable of producing a peak output of 140dB SPL on axis at 1 meter. The Mid/High section shall be capable of producing a peak output of 140dB SPL on axis at 1 meter.The dispersion of the loudspeaker shall be 100 degrees conical (-6dB). The enclosure shall be of birch plywood construction and internally braced. The enclosure shall be fitted with eight integral carrying handles, and twelve M10 inserts for flying hardware. The enclosure shall not exceed the following dimensions (H x W x D): 925mm x 694mm x 515mm (36.42" x 27.32" x 20.28").The loudspeaker shall be the Tannoy... VQ NET 100.Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************Tannoy United Kingdom T: 00 44 (0) 1236 420199E:********************。

炬力 mp3 方案

1. 引言本文档将介绍炬力 mp3 方案的设计和实施。

炬力 mp3 是一款便携式音频播放器，具有高音质、大容量和长续航等特点。

本文档将从硬件和软件两个方面介绍炬力 mp3 的设计和开发。

2. 硬件设计2.1 主控芯片选择炬力 mp3 使用一款高性能主控芯片作为核心处理器。

我们选择了 ARM Cortex-M4F 架构的芯片，具有低功耗、高性能和丰富的外设接口。

此外，该芯片还具备丰富的音频处理功能，可以实现高质量的音频解码和播放。

2.2 外设设计炬力 mp3 使用了一块高清彩屏作为显示界面，用户可以通过触摸屏进行操作和设置。

为了保证音频质量，我们选择了一款高性能的音频解码芯片，能够支持多种音频格式，并提供高保真的音频输出。

另外，炬力 mp3 还内置了一块大容量的存储卡，用户可以将音乐文件存储在存储卡中，并通过界面进行选择和播放。

此外，我们还提供了 USB 接口和蓝牙模块，用户可以通过 USB 传输文件或者通过蓝牙连接其他设备进行音频传输。

2.3 电池管理为了实现长续航能力，炬力 mp3 配备了一块高容量的锂电池，并使用了智能电池管理芯片进行充电和监控。

智能电池管理芯片能够根据电池状态进行智能管理，延长电池的使用寿命，并提供低功耗待机模式，进一步节省电能。

3. 软件设计3.1 系统架构炬力 mp3 的软件设计采用了分层架构，包括底层驱动、中间件和应用层。

底层驱动负责与硬件进行交互，包括外设的驱动和控制，音频解码和播放等功能。

中间件负责提供一些通用的功能和接口，例如文件操作、界面管理和输入输出等。

应用层是用户界面和应用程序的实现，包括音频播放、设置和菜单等。

3.2 音频解码和播放炬力mp3 使用了专业的音频解码算法，支持多种流行的音频格式，包括MP3、WAV、FLAC 等。

音频解码器会对音频数据进行解码，并通过音频输出接口输出。

在音频解码过程中，我们还对音频进行了处理和优化，以提供高品质的音频输出。

3.3 用户界面设计炬力 mp3 的用户界面采用了直观简洁的设计风格，通过触摸屏进行交互。

高效率低失真功率放大器

高效率低失真功率放大器
罗俊
【期刊名称】《现代电子技术》
【年(卷),期】2002(000)002
【摘要】引入△-∑转化器中处理量化噪声的方法,对一种新的功率放大器结构进行理论分析.这种新结构结合了线性放大器与非线性放大器*各自的优点,同时具有高效率和低失真的特性.理论计算与SPICE模拟结果均表明,它的确是一种有效的功率放大器结构.
【总页数】4页(P50-53)
【作者】罗俊
【作者单位】汕头市林百欣科技中专,汕头,515041
【正文语种】中文
【中图分类】TP3
【相关文献】
1.用于超低频振动校准系统的低失真度功率放大器的设计 [J], 陆忠兵;何闻;贾叔仕
2.超低失真功率放大器（上） [J], 唐帆;王遵棠
3.超低失真功率放大器的制作技术 [J], 林宏恩;匡连生
4.低失真、高PSRR的D类音频功率放大器 [J], 应建华;曾强;谢金纯
5.带双嵌套密勒补偿的CMOS低失真全差动功率放大器 [J], 苏玲
因版权原因，仅展示原文概要，查看原文内容请购买。

以柔克刚优化电脑一、SoundMAX 3.0让AC‘97脱胎换骨

以柔克刚优化电脑一、SoundMAX 3.0让AC‘97脱胎换骨原木
【期刊名称】《电脑应用文萃（电脑界配套光盘）》
【年(卷),期】2001(000)010
【摘要】一提到优化硬件,大家首先想到的就是超频。

不错,超频固然可以很明显的提升系统性能,但带来的系统不稳定的问题也是显而易见的。

而大家有没有想过,我们只需要修改、替换、优化驱动程序,同样也能让硬件发挥本身的潜能,提速电脑,或者使家用级硬件变为专业级硬件呢?就看看下面的文章吧!
【总页数】2页(P26-27)
【作者】原木
【作者单位】无
【正文语种】中文
【中图分类】TP334.7
【相关文献】
1.让AC＇97声卡也能用SoundMAX4.0驱动 [J], 飞跃
2.AC‘97与笔记本电脑中音频系统的设计 [J], 陈英俊;张红兵
3.AC'97与笔记本电脑中音频系统的设计 [J], 陈英俊;张红兵
4.高贵的AC'97声卡解决方案——SoundMAX 3.0 [J], 乌云
5.高贵的AC197声卡解决方案—SoundMAX3.0 [J], 乌云
因版权原因，仅展示原文概要，查看原文内容请购买。

aaf3标准

aaf3标准
AAF3标准是音频工作站之间的数据交换标准，也被称为数字音频文件交换格式标准。

它是由AES（音频工程师协会）和SMPTE（电影与电视工程师协会）联合制定的一个标准。

AAF3标准旨在定义一种通用的数字音频数据交换格式，以便在不同的音频工作站之间进行可靠的、高效的音频数据交换。

它支持各种音频元素，包括音频轨道、效果、混响、均衡器设置等，并可以描述这些元素之间的关系。

AAF3标准具有以下特点：
1.可扩展性：AAF3标准可以被扩展以支持新的音频元素和功能。

2.兼容性：AAF3文件与传统的音频工作站软件兼容，例如Adobe
Audition、Apple Logic Pro和Avid Pro Tools等。

3.高效的数据交换：AAF3标准采用高效的二进制格式，可以快速地
传输和存储音频数据。

4.支持多轨编辑：AAF3标准支持多轨编辑，可以同时处理多个音频
轨道。

5.支持时间码：AAF3标准支持时间码，可以精确地同步音频数据。

TOMS909 产品说明书

TIPTOP AUDIOHATS909Introduction.The TOMS909 is a recreation of Roland's legendary TR-909 analog Tom drums sound generator for use in modular synthesizer format. The TOMS909 includes all the original controls found on the TR-909 drum machine, as well as several new features never before available, such as extended TUNE range and independent voltage control for accent and tune/pitch on each drum. There are three independent Tom drum sounds, starting from the left with the Low, Mid, and High, Tom; each Tom drum section gives you full control over the Toms’ volume Level, Accent, Decay, and Tune levels. On the right side of the module is a voltage control section with a voltage control input for each Tom drum and an accompanying attenuator knob for scaling the incoming voltages, as well as a MIX OUT for summing the three drum sounds.Let’s get started.To start out using the TOMS909 let’s begin from the left side on the LOW Tom. First plug a gate signal into the LOW Tom GATE input this will trigger the drum to start playing. Turn the LEVEL knob up half way, plug the LOW OUT into your sound system, and turn the ACCENT knob up half way. Y ou will now hear the LOW Tom drum playing. Try changing the TUNE and DECAY knobs to hear their e ect.Repeat these steps in each section to get all three Toms playing together as each TOMS controls are identical. Y ou can plug the Tom’s OUT into your sound system each on their own channel, or you can plug the MIX OUT in to your sound system as one signal with the three Toms mixed together. Y ou can also enable the Bus Mix into the MIXZ mixer module by setting the header on the back.TUNE Explained:The TUNE knobs allow you to adjust the pitch/timbre of each drum making it possible to create a wide range of drum sounds from low end soft bass drums, Toms, and many other percussive sounds. Turning the TUNE knob clockwise will increase the pitch of the drum. Adding voltage control to the VC-TUNE section’s provides voltage control over the entire TUNE range giving you even more playing possibilities to explore using a keyboard or sequencer and new sounds to create by modulating the tune in the audio range. (the VC-Tune are not 1V/Oct)DECAY Explained:The DECAY knob adjusts the length of time the drum sound will play after reaching the peak of its attack; by turning it fully counterclockwise the drum sound will be shortened producing a tight plucking drum. Turning it fully clockwise will let the entire body of the drum sound through. Try experimenting with the three Toms at di erent decay settings to hear how they accompany each other in an open sound space.Dynamics and Gain.Dynamic Accent and Level control of any drum sound in the mix is a big part of making a beat sound right. Dynamic Accent provides emphasis on a particular note through loudness. I n analog circuits like the TOMS909, the accent pulse physically "hits" the internal envelope circuit, as well as the VCA for the white noise circuit, and provides not only a louder sound but also slightly more attack and noise.(much like if you were to hit a real bass drum harder with a drum stick.)While the original 909 has one global accent knob for setting accent levels for all of its sounds, the TOMS909 (and all other drum modules in this series) o ers an independent accent level control. This feature adds to richer dynamics than what was possible with the original machine.Accent Explained:The ACCENT IN on each Tom can be driven by either a gate/trigger or CV signal.While the accent input is not in use, the incoming gate input is routed (normalized) to both the accent input and the gate input. This serves for two purposes:1. To allow you to reach the hottest drum sound possible even when there is no accent input signal connected.2. It makes the ACCENT knob act as a ﬁne control of the output gain level. This is very useful in situations where the level knob range is too coarse for setting precise levels in a mix with other drum sounds.Connecting a gate or CV signal into the accent input will break the internal routing mentioned above and will allow for independent control over accent regardlessof the incoming gate signal. In this case as long as there is no accent signal present, the drum sound will be set to the minimum accent level set internally,and once the accent input gets hit by a gate or CV signal, the drum sound will get louder in proportion to the accent level set by the accent knob. In short: the higher the knob setting, the larger the di erence will be in gain levels betweenthe accented notes and the un-accented notes. Using CV allows for even greater variations.Triggering the TOMS909 with the Trigger RiotStart by patching the TOMS909 MIX OUT to your sound system, turn the Low Tom LEVEL knob up half way and the TUNE knob all the way to the left, turn the DECAY knob all the way to the right fully open, turn the ACCENT knob half way up. Next from the Trigger Riot set in MATRIX MODE, patch OUT 1 in to the LOW Tom GATE IN. Now with the Trigger Riot in DIVIDE MODE set knob 1 on the Riot to 6, press START and you will hear the Low Tom playing. Next set the TOMS909 controls for the MID and HI TOMS to the same levels you did on the LOW TOM. Patch out 2 from the Trigger Riot to Mid Tom GATE IN, turn knob 2 on the Riot to 3, next patch OUT 3 to HI GATE IN, turn knob 3 on the Riot to 8.You are now gate sequencing all three Tom drums together with each Tom being triggered on a di erent note, try changing the TUNE and DECAY settings on each drum to hear how di erent rhythm structures can be produced.Now lets patch OUT 4 on the Trigger Riot to the HI Tom ACCENT I N and set the ACCENT knob to 75%, with the Trigger Riot in DIVIDE Mode, turn knob 4 to 7.Now listen to the change in volume level on the HI Tom when the Accent GATE hits at the same time a note is played you will hear a change in loudness per each drum hit. Try repatching OUT 4 to the other ACCENT IN for LOW and MID and Toms. Using Stackcable try patching OUT 4 from the Trigger Riot to all of the TOMS ACCENT inputs.By changing those settings on the TOMS909 and the Trigger Riot an inﬁnite amount of polyrhythmic combinations can be achieved.The TOMS909 sound great with paning in the stereo ﬁled, when used with the stereo PingPong Delay on the Z-DSP the TOMS really comes to life.*Alternatively you can use any gate sequencer with a positive going signal to trigger the TOMS909.Audio Frequency Modulation and Timbre Shaping using Voltage ControlFrequency modulation in the audio range is a synthesis method you can use for harmonizing the toms sounds using audio from other sources, such as the Z3000 VCO or basically any other sound source, even other drum sounds.This will help you to apply some timber changes to the toms, creating new drum sounds.Patch the Trigger Riot to all three toms and patch their outputs so you can hear them playing. Using Stackcables, patch the Z3000 oscillator’s Sine wave in to the VC-L-TUNE the VC-M-TUNE and the VC-HI-TUNE. Set the VC scaling knobs for Low, Mid, and Hi to 100% so you can hear the e ect clearly. You will now hear a drastic change in the drums’ tonality. Adjust the frequency knob on the Z3000 slowly from the left to the right; as you go higher in frequency the VC modulation amount applied to the drums becomes more intense. Now try changing the TUNE setting on each Tom drum and take some time to hear how by using the VC-TUNE with a VCO, you can harmonize the toms sounds giving them an extra range of metallic feel that can be shaped into a variety of modulated drum sounds. Having short decay settings shapes these timbres into great sounds and applying stereo Ping Pong delay from the Z-DSP takes them to the next level.Now lets sequence those harmonics; start by patching the CLOCK and RESET OUT of the TRI GGER RI OT into the CLOCK and RESET inputs of a Z8000 sequencer, next patch a CV OUT of the Z8000 into the 1V/OCT input on the Z3000 oscillator. This will make the modulation frequency of the Z3000 to track in time with the notes you programmed on the Z8000. Using this technique you can sequence the harmonics you apply to the TOMS909. Go forward and try using di erent waveform outputs on the Z3000 patched to the VC TUNE inputs, you can also use an LFO, Envelope or any other modulation source, either audio or control, to voltage control the TUNE settings. Experiment by using more than one Z3000 to VC control each TOMS VC-TUNE.Z3000Z8000Trigger Riot TOMS9091V/Oct SINE OUT StackcableVC-LVC-MVC-HCV OUT TRIGGER OUTSCLOCK INCLOCK OUT RESET IN RESET OUTStackcable。

aw36099dnr原理 -回复

aw36099dnr原理-回复AW36099DNR（高级Web360度降噪）是一种先进的音频处理技术，通过降低背景噪音，提高声音的清晰度和质量。

本文将逐步解释AW36099DNR的工作原理，并介绍该技术在不同领域的应用。

首先，AW36099DNR利用麦克风或其他音频设备对原始音频信号进行采集。

这些信号往往包含了大量的背景噪音，如交通声、机器噪音或其他环境噪声。

接下来，通过信号处理技术，AW36099DNR将原始音频信号分割成频谱。

频谱表示音频信号中不同频率成分的强度。

然后，AW36099DNR使用算法分析频谱，并找出其中的背景噪音部分。

一旦背景噪音被确定，AW36099DNR会生成一个音频模型，以描述背景噪音的特征。

然后，这个模型被用于降噪处理。

在降噪处理阶段，AW36099DNR通过动态调整音频信号的增益来抑制背景噪音。

增益是指增加或减小音频信号的振幅，以调整音量大小。

通过增大主要信号（如人声）的增益并减小背景噪音的增益，AW36099DNR可以减少背景噪音在最终音频中的影响。

此外，AW36099DNR还可以通过频率控制技术来减少背景噪音。

通过检测和分析音频信号中不同频率的噪音成分，AW36099DNR可以有针对性地降低这些频率噪音的增益，以达到降噪效果。

由于AW36099DNR采用了高级信号处理算法，因此它不仅可以减少背景噪音，而且还能保持音频信号的清晰度和质量。

AW36099DNR能够识别主要信号（如人声或乐器）与背景噪音之间的差异，从而避免对主要信号的干扰。

AW36099DNR的应用非常广泛。

在通信领域，这种技术可以用于提高手机通话的质量，减少环境噪音对通话的干扰。

在音频录制和音乐制作领域，AW36099DNR可以帮助音频工程师消除或减少湍流噪声和其他不必要的噪音。

此外，AW36099DNR还可以广泛应用于视频会议、语音识别和语音助手等人机交互场景中，以提高语音识别的准确性。

总结而言，AW36099DNR是一种先进的音频处理技术，通过分析和降低背景噪音，提高音频信号的质量。