音频功能实现

1.音频PCM转SPX格式:http://blog.csdn.net/chenfeng0104/article/details/7088138

2.Google开源应用:
http://code.google.com/p/android-recorder/

3.第3方:
http://code.google.com/p/freemp3fordroid/

4.http://lame.sourceforge.net/links.html

5.http://developer.samsung.com/android/technical-docs/Porting-and-using-LAME-MP3-on-Android-with-JNI