Video plays, I hear the audio, but my keys don't move (well, very very occasionally I'll catch one moving...).
I confirmed that audio seems to come over the left channel, and the right channel seems to include the encoded (sounds like static) information for the MIDI. When I swap left and right channels, I can hear the static, so I know that the cable is fine. The "static" is somewhat lower in volume then the audio, but I suspect that the piano ought to be able to understand it just fine...Any other troubleshooting tips? I confirmed via Disklavier Radio that my keys do actually move when playing back MIDI (sometimes that stops working, and the piano needs a reboot).
Thanks.
-Kevin