I'd like to hear the audio. I've been following these posts because I'm hoping there's still help for my K1 II keyboard. At the moment it's nothing but a MIDI controller. There is some audio output, but doesn't sound anything like it should; lots of white noise, random uncontrolled modulation, and only a hint of what the patch is. I took it to get serviced and was informed that an unavailable proprietary chip has failed.
So I'm curious to see if your audio sample is similar. Let's hope not. Thank goodness I still have a working K1r II. :-)
~Brian