音频处理的代码，主要是架构的代码，有if，id，ex，ma，wb等5个阶段的代码，也有ctrl等控制代码-Audio processing code, the main structure of the code is there if, id, ex, ma, wb, etc. 5 stages of the code, but also ctrl control code, etc.

This program is equivalent to the "Mute all" check box of Windows Volume Control for Playback. The Master Mute control is the MIXERCONTROL_CONTROLTYPE_MUTE control of the MIXERLINE_COMPONENTTYPE_DST_SPEAKERS destination audio line. It belongs to the