Hi Folks, thanks.

1) the VST is on the Thru track, being driven by my keyboard.
2) here is the MIDI options screen:
https://ibb.co/nhCQRL
3) I'm using ASIO through my AudioBox 96 interface. here is the audio setup screen:
https://ibb.co/fUXmY0
4) here is the screen from the AudioBox 96 driver:
https://ibb.co/eXavRL
5) here is my RealTracks preferences screen and mixer showing the tracks i am using. I don't see a "This song has problems" checkbox
https://ibb.co/gdHmY0
6) the "audio breakup" sounds like crackling, like there is lost audio signal
7) the backing track plays fine by itself. the problem happens when start playing notes/chords on the keyboard.
8) i take that back. the degeneration gets worse over the course of the song, such that after a few minutes even the backing track is crackling
9) holding the sustain pedal seems to make it worse
10) another thing i've noticed is that BIAB won't let me run the driver at 48mhz. it is stuck at 41, even though my other audio applications can run at 48.

steve

Last edited by steve200; 10/15/18 03:52 PM.