基于ALSA实现代码调节音量

一些设置的选项 Headphone ADC FM volume ADC INPUT GAIN control ADC MIC Boost AMP en ADC MIC Boost AMP gain control ADC PA speed select ADC mixer mute for FML ADC mixer mute for FMR ADC mixer mute for left ouput ADC mixer mute for linein ADC mixer mute for mic ADC mixer mute for right ouput COS slop time control for Anti-pop External Speaker LINEIN GAIN control MICIN GAIN control SPK_L Mux Left Mixer en SPK_R Mux Right Mixer en dac digital volume dac: left analog output mixer en dac: left chanle en dac: left hpout to right hpout dac: left mixer mute: FM dac: left mixer mute: left dac dac: left mixer mute: linein dac: left mixer mute: mic dac: left mixer mute: right dac dac: left mute dac: right analog output mixer en dac: right chanel en dac: right hpout to left hpout dac: right mixer mute: FM dac: right mixer mute: left dac dac: right mixer mute: linein dac: right mixer mute: mic dac: right mixer mute: right dac dac: right mute head phone power head phone volume hp left source select: 0-dac, 1-mixer hp right source select: 0-dac, 1-mixer

实例-亲测