After reading this post, I had a dream... using my empeg as an headset device for my mobile phone !
Some questions arise to me :
Is it possible to use the bluetooth module with an empeg through Pcat's tuner kit ?
IIRC, there are I/O pins left on the kit for "future use", and the kit provides 5 and 9V DC.
Is it possible to use the tuner's PIC for multiplexing the data over the serial line ? Of course some code must be written into the kernel to demux the data... and to encode it correctly to the kit... This must also be done on the programmable PIC...
What is the speed of the tuner's serial line ? 9600 ? Could it be raised to 115200 (empeg and tuner side)? What is the bandwith needed for normal operation of the tuner ?
The TDK's module support GAP protocol (General Audio Protocol), so it would be possible to establish an audio connection with an mobile phone.
Can PCM decoding be done by the empeg processor, at kernel level ? And encoding the voice from the mic input ? But... how can I transfert the PCM data ?

I'll first wait for my tuner kit.... my order number is 133...