Cool!

I have not tried to use that analog audio connector because I noticed that it was connected more or less directly to the chip. Whereas on the BlueGiga board, it had a bunch of capacitors and other interesting circuits inbetween the line in connector and the chip. I didn't want to have to figure all of that out so I just have been going pure I2S with this board.

If I were in your shoes I would have just soldered my own pigtail female jacks to the line input pins on the board, instead of trying to move stuff around on that board.
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Tony Fabris