internal_mpu
static snd_wavefront_mpu_id internal_id = internal_mpu;
if (mpu == internal_mpu) {
internal_mpu);
write_data(midi, mpu == internal_mpu ?
substream = midi->substream_output[internal_mpu];
mpu = internal_mpu;
substream = midi->substream_input[internal_mpu];
mpu = internal_mpu;
card->wavefront.midi.output_mpu = internal_mpu;
card->wavefront.midi.input_mpu = internal_mpu;