I tried all the supported formats on the prototype board, but it still isn't working any better. Left justified gives the opposite effect of the I2S setting. Right justified gives no sound. Not sure what the problem is. I can hear something resembling what is playing, but it is riddled with distortion. In I2S mode, there is more distortion in the right channel and in left justifed, the opposite is true. There must be something wrong with the timing of the signals, but I'm not sure what. It's odd that it works fine in the Empeg and not in the RioReceiver.

I'll keep investigating.

Stu