Thanks Megafiddle

You continue to get EXACTLY the same results as I have been getting, literally for years with many versions of BIAB and configurations. I am also currently using a SD-50. It has nothing to do with drivers, or hard vs soft synths (I have fiddled with those ad infinitum) it is a BIAB software glitch. Yes, the problem is very intermittent which makes testing a bit frustrating. You are also right that the noise is usually a "blip" but sometimes it is a single note with all the instruments and it keeps sounding until I hit stop.

It can also happen anywhere I start the song in the middle.

If anyone is wondering why I am plugging away at this, I played a gig over Xmas and every now and then after I announced a song and double clicked on it in the songpicker the song would load and immediately get a load blip or sometimes a continuous note - not very professional.

Peter, are you still following this?

Thanks
Tony