Data is not processed on the Wiimote. The Audio comes in as ADPCM, which does need to be decompressed and then goes through a DAC plus presumably some kind of

Data is not processed on the Wiimote. The Audio comes in as ADPCM, which does need to be decompressed and then goes through a DAC plus presumably some kind of amplification. ADPCM is easy to decode, but does still need a processor of some kind.