SNDRV_GF1_VB_VOLUME_START
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, 0);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET); /* ramp start */