ESSSB_IREG_AUDIO2CONTROL1
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x92);
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x93);
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0);