Warning: if you are not interested in bluetooth captures or audio hackery, uh, maybe kittenwar is where you want now 🙂
Attached is a bluetooth snoop log (open in Wireshark) of the SmartMic/Mike+ operating natively in Android, so e.g. its high-quality mode. You can see a couple of MPX_CTRL Modem Status Commands that are intriguing, as are the DLC Parameter Negotiation.
Any suggestions on how to put this in highest quality mode in linux?
Answer (partial): it puts it in SPP (serial port) mode, and sends as fast as it can. The packets are about 216 bytes of payload, and about 150/s, giving about 260Kbps of throughput.