labview 锁相放大器

c语言开发的用来控制声卡音调的源码。有一定的参考价值-used to control the pitch of the sound source. There will be some reference value

1,增加了歌词搜索的自主性,用户可以选择自定义搜索关键字,也可以自定义是否和歌词文件相关联,这里的关联并不是把歌词写入歌曲文件,而是在程序中建立一种关联,以免每次播放这首歌的时候都去搜索歌词,而是直接去读取关联好的歌词文件. 2,增加了指定歌词的搜索目录,指定歌词的保存目录功能.为了性能考虑,歌词的搜索目录不会往下递归,只搜索设置的那一级目录. -1, an increase of the autonomy of the lyrics search, the user can select a custom search keyword, but also can customize it and lyrics files, link here is not to write songs lyrics files, but in the process of establishing a linked so as not to play this song every time the time to search for the lyrics, but a direct link to read the lyrics a good document. 2, an increase of the designated search lyrics directory, specify the directory function of the preservation of the lyrics. to performance considerations, the lyrics search directory recursion is not down, it only set up a search directory.

语音压缩编码原理介绍和实现方法，对语音编码的初学者入门快。-Introduce the principle of voice compression coding methods and the implementation of speech coding beginner quick entry.

解析歌词文件, 使用正则表达式, 得出歌词文件中的时间及歌词等信息. -Parsing lyrics files, use regular expressions come to lyrics in the file information such as time and lyrics.

语音处理工具箱，包括矢量量化、主分量分析、动态时间规划等工具，可以提取语音信号的频率、功率、振幅、共振峰等参数，是分进行语音情感韵律参数提取的有效工具。

用于语音视频聊天的类,非常方便的实现将录制的PCM格式的语音,压缩,解压,视频采集,播放-Voice Chat Class. Very easy to implement record PCM format voice, encode/decode,gather vedio and play back.

itu-t g.729的一个实现例子，包括附录b的vod检测等功能-ITU-T g.729 example, include VOD detect of reference B, etc.

语音是人类的特征之一，不同的人拥有不同的声音，但在一些特殊情况下，人们希望改变声音来隐藏身份。语音变音技术应运而生，通过改变声音的频率、幅值达到改变声音的目的。本作品通过labview中的声音采集及播放模块，达到对声音信号的采集、在不同范围内改变声音的频率。

ARM2410增加了播放功能的录音机(用WaveInOpen/WaveInClose等底层函数)-ARM2410 increase the playback functions recorders (using WaveInOpen/WaveI nClose bottom function etc.)

AC 97codec部分的源码-97codec part of the AC source