And speaking of the tuner connector...

When the tuner module sends its audio data back to the empeg so that it can output the audio to the speakers, does it do so as analog or as digital?

In other words, in addition to a second serial port existing on the tuner connector, is there by happenstance an unused digital audio connection of some kind on that tuner connector? And if so, does it have the potential to be a two-way digital interface, receiving digital audio from the player instead of sending digital audio to the player?