嵌入式linux开发中用于测试ALSA音频驱动的小工具，需要经过交叉编译后，生成多个二进制文件，可用于录音、播放.wav文件。-Embedded linux development ALSA audio driver for testing the gadget, to go through cross-compiled to generate multiple binary files, can be used for recording, playback. Wav files.