Haha! Oh man! Only a few years ago, I had to reverse engineer and build my own! In fact, I just started working on it again. I was going to make it an open source project. Its fully functional and runs on a little Arduino. I just had a run of test PCB's made. It used the BC127 audio bluetooth module which handles all the metadata. Only thing I didn't look into was the playlist stuff as I wanted it mainly for Pandora and other live streaming sources. Maybe Ill look at that again....
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