ICSMIX_CHAN_5
#define GUSMIX_CHAN_MASTER ICSMIX_CHAN_5
if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
u_char sc_setting[ICSMIX_CHAN_5+1][2]; /* current settings */
u_char sc_mute[ICSMIX_CHAN_5+1][2];/* muted? */