Returns a sample buffer from the queue for writing. This function can be called in half-duplex output or full-duplex modes. When the buffer is done, it can be added to the I2S write queue by calling write() (see I2S)
SampleBuffer buf = i2s.dequeue();
for (size_t i=0; i<buf.size(); i++) {
buf[i] = SAMPLES_BUFFER[i];
}
i2s.write(buf);