i2s_set_rate
i2s_set_rate(sc, 44100);
i2s_set_rate(sc, 44100);
if (i2s_set_rate(sc, play->sample_rate))
int i2s_set_rate(struct i2s_softc *, int);
i2s_set_rate(sc, 44100);
i2s_set_rate(sc, 44100);