Don't select an audio track. What version of Logic are you running? Is it Mac or PC? You should have an audio instrument track available for selection. You may have done this, but I couldn't tell exactly what you meant by "changing an audio track in instrument". That statement doesn't make much sense to me. There are dedicated tracks made specifically for VST instruments which are completely different from audio tracks (this method is completely different from ReWire which imploys tweaked audio tracks to allow external soft-synths to play through the Logic mixer). The dedicated VST instruments should pop up on the default "new song" setup in both the arrange window (usually two of them by default) and in the environment (all sixteen). Trying do this in an existing song may not work, especially if you are on a Mac using OMS. This issue gets complicated so I won't go into it. Just make sure that you are using a new song environment, that you are running Logic 4.5 (at least / 4.3 is the minimum), and that you are selecting a real "instrument track". Also, go into the environment window the channel strip of the appropriate "instrument channel" (there should be sixteen of these). Make sure the output on the channel strip is pointing to the main outs (or to a bus is you are doing a submix like with drums for instance. If you do this make sure the bus is then pointing to the main outs). By clicking at the top of the channel strip, you can also control input allocation on the left/bottom side of the window. If you are on a Mac, your OMS or FreeMIDI could be screwed up, but I doubt that's causing the problem since this is an internal VST instrument. If this doesn't help, you'd better contact Logic. Jer -------------------- Jer Olsen, President Global Express Media LLC "The Mecca for Musicians" http://MusicProTools.com/ HELP@...