SV_IREG_PC_ENABLE
snd_sonicvibes_out(sonic, SV_IREG_PC_ENABLE, sonic->enable = 0); /* disable playback & capture */
snd_sonicvibes_out1(sonic, SV_IREG_PC_ENABLE, sonic->enable);
snd_sonicvibes_out1(sonic, SV_IREG_PC_ENABLE, sonic->enable);