Been looking in to this so I have got the stereo version going but it seems to me that the delay between processing left and right channels is too great, has anyone else noticed this. I ca see it visually using a mono signal, the needles don't move In unison. I put a little test in to output to pin 13 (the one with the LED) every time one channel is updated. I observed a 8Hz output, in fact I also put an output to pin 12 when the other channel is updated, I didn't bother to read the trace that well as I had already decided that this was too slow and also, as I said before you can see it as too slow when running.
Any thoughts?