Thanks guys, but it's neither of those things - the UM-2 is enabled for input and output in the MIDI devices menu, and is listed correctly in the MIDI hardware output menu. I've selected it in that menu on the relevant track that the Timefrog is sending MIDI to, as this was the way I expected it to work, but nothing gives.
Ollie, it's not that there's no sound coming from anything (although obviously there isn't yet
), it's that the MIDI isn't even reaching the UM-2. It has an LED which blinks on receiving messages, and it doesn't get that far.
Ah, hang on, I've just realised I've misread your post. That would stop the flow of MIDI through the channel wouldn't it? I'll double-check that tonight and get back to you. Hopefully that's all it is! If so, d'oh.