UAUDIO_NFRAMES
#define UAUDIO_IRQS (8000 / UAUDIO_NFRAMES) /* interrupts per second */
uint32_t buf_size = (((chan_alt->sample_rate * (UAUDIO_NFRAMES / 8)) +
frames = UAUDIO_NFRAMES;
.frames = UAUDIO_NFRAMES,
.frames = UAUDIO_NFRAMES,
.frames = UAUDIO_NFRAMES,
.frames = UAUDIO_NFRAMES,