CHN_GETVOLUME
*(int *)arg = CHN_GETVOLUME(volch,
*(int *)arg |= CHN_GETVOLUME(volch,
*(int *)arg = CHN_GETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_FL);
CHN_GETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_FR) << 8;