Delphi写的控制左右声道的小程序。立体声的播放设备中，L、R声道是分开独立的，两声道的音乐也是不一样的，这样人听起来才会有现场感，也就是立体声效果。-Small program written in Delphi to control the left and right channels. Stereo playback devices, L, R channel is separate, two-channel music is not the same, so that people