e_rate
er = e->e_rate;
e->e_rate = ENG_RATE(e);
fragfr = e->e_rate / audio_intrhz;
(e->e_rate < 5000) || (e->e_rate > 192000)) {
sp->s_phys_parms->p_rate = e->e_rate;
st->st_rate.value.ui32 = e->e_rate;