Cool, thanks! This is encouraging. I'm hoping to get the prototype working, and then refine it into an easy-to-duplicate kit. Maybe Stu would want to sell the kits once it's ready?

I'm deeply disappointed that I'm now on my third bluetooth chipset trying to get this thing working. Should have had it done by now. Honestly that BC127 should have done the trick if it didn't have that weird bug where it's incompatible with my car stereo.

I have high hopes for the BlueGiga chip set based on how audio-focused that dev board looks. The datasheet and docs are also very audio-quality focused, down to the level of describing how to run the audio/ground traces for the best noise rejection. So, crossing my fingers.