\f
/* pull one channel out of a multi-channel stream */
static size_t
+demux_internal(float *dst, char *src,
+ size_t n, int chan, sound_jack_aj_data_t *f);
+static size_t
demux_internal(float *dst, char *src,
size_t n, int chan, sound_jack_aj_data_t *f)
{