Software oscilloscope for audio input

The user may: 1. Use the PESQ Software to:       i)   understand the PESQ Algorithm; or       ii)  evaluate the ability of the PESQ Algorithm to perform            its intended function of predicting the speech quality            of a system; or       iii) evaluate the computational complexity of the PESQ Algorithm,

labview 锁相放大器，基于相关检测原理设计了一种数字锁相放大器，重点研究了采样频率与相关运算结果的关系。发现参考信号为方波而采样频率与信号频率成一定关系时，系统相关运算存在固有误差。为减少该误差，首次将动态采样法引入数字锁相放大器设计中，运算发现动态采样的采样频率数越多，奇点产生的误差越少。基于LabVIEW 软件对所设计的检测系统进行了仿真 测试，测试结果表明该数字锁定放大器在信号幅度为5 V、噪声标准差小于等于50 时( SNR = －34． 04 dB) ，能有效地检测出频 率为500 kHz 以下的信号，系统检测结果与理论计算值的相对误差基本不超过2%。可以用于

录音机程序,VISUAL BASIC代码-tape recorders procedures VISUAL BASIC code

UIQ 3.0下的音频播放引擎，很简单，很清楚-UIQ 3.0 audio player under the engine, very simple and very clear

mepg4音频源码，感觉比较好，希望对大家有所帮助。-mepg4 audio source, feel better, and they hope to be helpful to everyone.

CELP encoder: CELP Verion 3.3 C code- CELP encoder: CELP Verion 3.3 C code

AdjustSound sample shows how to load and play a wave file using a DirectSound buffer and adjust its focus, frequency, pan, and volume

AudioRep complemental example audio file

利用VHDL语言设计的正弦波发生器，只是基本操作，仅供学习参考！-Design using VHDL language of sine wave generator, but the basic operation of reference for learning!

采用MCI实现录音功能，同时也可以简单播放文件。-recording function, but can also broadcast a simple document.