It could be an audio driver issue. If you're using ASIO, try switching to MME. And vice versa. I've seen this when using an external synth and ASIO. There is a checkbox in the Audio settings to fix a RealDrum problem when using this combination. This may fix it if that is your setup.

If you can't resolve the issue, provide us with more info such as synth, audio driver, etc.

R

Last edited by Rachael; 05/13/12 12:44 PM.