audcom
ret = audcom(av7110, AUDIO_CMD_MUTE);
ret = audcom(av7110, AUDIO_CMD_UNMUTE);
ret = audcom(av7110, AUDIO_CMD_MUTE);
ret = audcom(av7110, AUDIO_CMD_UNMUTE | AUDIO_CMD_PCM16);
ret = audcom(av7110, arg ? AUDIO_CMD_MUTE : AUDIO_CMD_UNMUTE);
ret = audcom(av7110, arg ? AUDIO_CMD_SYNC_ON : AUDIO_CMD_SYNC_OFF);
ret = audcom(av7110, AUDIO_CMD_STEREO);
ret = audcom(av7110, AUDIO_CMD_MONO_L);
ret = audcom(av7110, AUDIO_CMD_MONO_R);