Have you checked that the audio issues only occur for Superior Drummer 3 in standalone mode?
Does it sound bad when you:
- run plugins in DAWs, like cubase or similar?
- run Superior Drummer 3 in a DAW?
- Is it a difference if you increase the buffer size in Superior Drummer 3 Audio Device settings? Try something like 1024 - it increases the latency, but offloads the audio processing...
I am asking because these kind of problems almost always comes from the audio device/drivers/computer, or similar... It can of course be SD3 causing this, but we need to rule out the most common sources first 🙂