linux下新一代音频库alsa的编程指导手册，非常适合入门，pdf格式-Under the new generation of alsa audio library linux programming guide, ideal for entry, pdf format

linphone-3.3.0 版本，这个就不多做介绍了，知道的人都知道！如果还是不知道，那么看看下面英文的介绍吧。-Features Linphone provides a large amount of functionalities. List of supported features: * audio with the following codecs: speex (narrow band and wideband), G711 (ulaw,alaw),