When I play the files through the VSC and the SD-20 on the old laptop they sound fine. I play the files through the VSC/DXi on my PC with Windows XP and they sound fine. I can play the files through the W7 64-bit new laptop and they sound fine as long as I switch off the TTS and use the midi mapper. They sound fine this way over the little speakers I have on my desk and also sound fine when played through the SD-20 with my large speakers in the basement!? Scott