Linux下的声音设备编程比大多数人想象的要简单得多。一般说来，我们常用的声音设备是内部扬声器和声卡，它们都对应/dev目录下的一个或多个设备文件，我们象打开普通文件一样打开它们，用ioctl（）函数设置一些参数，然后对这些打开的特殊文件进写操作。-Linux Generally speaking, we used the voices of internal equipment and audio speakers, which corresponds to / dev directory of one or more equipment, we like to open the file as they opened with ioctl () function set some parameters, then open these documents into the special write .