chn_start
err = chn_start(c, 1);
err = chn_start(c, 1);
err = chn_start(c, 1);
ret = chn_start(c, 0);
ret = chn_start(c, 0);
ret = chn_start(c, 1);
ret = chn_start(c, 1);
u_int32_t chn_start(struct pcm_channel *c, int force);
chn_start(rdch, 1);
chn_start(wrch, 1);
chn_start(wrch, 1);
chn_start(wrch, 0);
chn_start(wrch, 0);
chn_start(c, 1);
ret = chn_start(c, 1);
ret = chn_start(c, 1);