This book by Ivan Tashev provides a comprehensive yet concise overview of the fundamental problems and core signal processing algorithms for digital sound capture, including ambient noise reduction, acoustic echo cancellation, and reduction of reverberation. After introducing the necessary basic aspects of digital audio signal processing, the book presents basic physical properties of sound and propagation of sound waves, as well as a review of microphone technologies, providing the reader with a strong understanding of key aspects of digitized sounds. The book discusses the fundamental problems of noise reduction, which are usually solved via techniques based on statistical models of the signals of interest (typically voice) and of interfering signals. An important discussion of properties of the human auditory system is also presented; auditory models can play a very important role in algorithms for enhancing audio signals in communication and recording/playback applications, where the final destination is the human ear.

2016年9月28日最新发布的USB AUDIO 3.0规范，专门针对 type-c，如type-c耳机

html5 audio自定义样式以及播放控制demo。以前那个有bug，csdn太坑不能删除或者修改，只能重新上传一个了

Virtual Audio Cable 4.10 64位32位通用破解版 无提示音

LipSync是什么？ LipSync是一个基于Unity的独立，轻量化口型匹配解决方案。它可以帮助开发者在Unityy上，用相对少的时间效应实现效果相对令人满意的“口型匹配”功能。的人物模型，口型动画以及语音资源，实现即时的口型匹配功能。您只需要告诉LipSync语音数据的来源，带有口型BlendShape的目标对象以及BlendShape属性名，并进行简单的设置，就能够让你的人物转换语音的播放动起他/她/它的嘴巴。 不过LipSync不是万能的。为了能够愉快而有效地使用LipSync，你需要知道它目前做得到的事情有： 实时地分析语音数据，运用语音识别的一些理论，识别出时间时间帧中这段语音

SPI with Audio Codec

这个很好用，而且也消除了非正式版中的女声， 解决了win7无法实现立体声混音的问题. Virtual Audio Cable是一种音频驱动程序，使您可以从一个应用程序传输音频串流到另一个。它创建一个双音频输入/输出设备。任何应用程序可以将音频输出到音频设备，当然其他应用程序可以收到输入音频。

解压密码 123456 因注册鸡会引起误报, 只共享了注册玛, 够用了. The ARTA software consists of following programs: ARTA - program for the impulse response measurement and for real-time spectrum analysis and frequency response measurements. STEPS - program for frequency response measurements with stepped-sine excitation. LIMP - program for the loudspeaker impedance measurement and loudspeaker parameters estimation. The ARTA program has functions of following measurement systems: Impulse response measurement system with signal generators: periodic white noise, periodic pink noise, MLS, linear and logarithmic swept-sine. Dual channel Fourier analyzer with signal generators: white noise, pink noise, periodic white noise and periodic pink noise. Single channel Fourier analyzer with signal generators: periodic white noise and periodic pink noise. Spectrum, octave band and THD analyzer with signal generators: sine, two sine, multitone, periodic square and triangle, white noise, pink noise, periodic white noise and periodic pink noise. Triggered storage scope with spectrum and short-time Fourier analysis. Two-channel voltage level meter and third octave analyzer With calibrated microphone, ARTA can be used as a virtual IEC class 1 SPL meter with a real time modes: Integrating SPL meter with 24 hours data logging, Octave SPL meter with noise rating (NR, NC, PNC, RC, NCB), Third octave SPL meter with report of specific loudness, loudness in sones and loudness level in phones. The ARTA program is also a powerful analyzer of: Gated frequency response, Smoothed frequency response (in 1/n-octave bands), Step response, Impulse response envelope (ETC – curve), Cumulative spectral decay waterfall graphs and sonogram, Burst decay waterfall graphs and sonogram, Energy decay in reverberant environments, Room acoustical parameters, Directivity patterns, Speech intelligibility measures: MTF, STI, RASTI, %AL. The STEPS program enables the measurement of the frequency response with a high dynamic range and a high noise immunity. Simultaneously with a frequency response measurement the STEPS estimates levels of 2nd, 3rd, 4th, 5th and higher order harmonic distortions.

NAU8401 Audio DAC芯片数据手册 DatasheetRev2.4，设计导航资料

NAU88C22 NAU88L24 NAU85L40 Audio_ADC数据手册用户设计指导