UAUDIO20_MAX_RATES
uint8_t data[2 + UAUDIO20_MAX_RATES * 12];
rates = min(UAUDIO20_MAX_RATES, (255 - 2) / 12);
if (rates > UAUDIO20_MAX_RATES) {
DPRINTF("Too many rates truncating to %d\n", UAUDIO20_MAX_RATES);
rates = UAUDIO20_MAX_RATES;