Hi, all! You were critical in helping me troubleshoot my GUS last year, and I am eternally grateful for that.

Now I come to you with a new and interesting issue.

I've got my GUS installed in an Aptiva 2168-M71 (P133, 16 MB) alongside an SB16. The SB16 works with games flawlessly, and the GUS does too... most of the time.

What happens with the GUS is random lockups within games. They're not super-common, but frequent enough to be annoying. There doesn't seem to be a pattern - I've seen it happen with, say, menu transitions in Epic Pinball, or when I go to save my game in Jazz Jackrabbit and start typing a save name. Both music and sound render properly - it's just the lockups, which never happen with the SB16.

My current ULTRASND settings are 240,5,5,11,7. I had to change the playback DMA to 5 some time ago to get the card to work properly with Star Control II (it would play incorrect samples otherwise; something different about that particular DMA, I guess). The SB16 sits on standard BLASTER settings (port 220, IRQ 5, etc).

Here's what I've tried:

- leaving SB16 disabled (no effect)
- leaving SB16 enabled (no effect)
- using GUSCLEAR.EXE before running the game (not sure whether this is helping)

Any suggestions are welcome. Maybe a lower IRQ? Would that make a difference? I believe I'm using the latest set of GUS drivers, version 4.something dated '93.