I am starting a new project, and am having problems with sync on playback. I use cubase studio 4 and presonus firestudio 26x26 on windows XP machine. This setup has worked fine in the past.
Did some test recording of guitar over cubase click track and also some EZDFH (vst) midi drum loops. The problem seems to be audio-MIDI sync. The audio and midi drift after about 8 bars or so.
While recording, my playing is in time with either the click or the midi drum loops. On playback however, the guitar starts off in sync, and then usually ends up ahead of the midi. Also, the click track and the midi drum loop do not sync either. They are off from the very beginning of playback. I have tried multiple sample rates, buffer sizes, external sync via SPDIF mic preamp, different timecode control within cubase (internal, ASIO) and all have same problems.
I also have an M audio midisport 2x2 connected to the computer via USB. this is a new addition since the last time I recorded. It was on but but not being actively used (no midi coming in or out of computer) during the test recordings. not sure if that could be an issue.