Ian, try this: Prefs=>midi driver & toggle off the "use VST synth." If that doesn't work, leave it on and toggle the switch just beneath it. Also in the Alt-F2 dialog, and in the overrides dialogs, make sure the thru switches are enabled (though from your description, sounds like they are.) Also check thru volume as the song plays just in case a setting in the song itself has zeroed it. If none of this works, problem may relate to the type of driver (MME vs ASIO). Post back with details and someone should help. Pretty sure there are other threads on this issue, but can't find one myself at moment.

HTH, Ron

EDIT - The problem may be fixable by configuring the proper driver properly but still give a latency problem. It shouldn't with a hardware synth, but if it does, or if all you want to do is play along, then you might try disabling thru and setting the synth local *on*. (Rachael's advice to leave it off is the normal mode for an external controller/sound source, but depending on needs, this could be a simple alternative that sidesteps thru issues altogether. Just a thought.)

Last edited by rkl122; 03/20/09 08:28 AM.