EHX makes some pedals thar take the guitar sound and produce some very credible polyphonic sounds of synths etc.
I needed a good Mellotron sound and hooked the EHX Mel9 to a mono I/O. Then I made this patch and I've put in the Mono Insert module an External Effect Device from the Tools. I linked it to the I/O's above and you have the mellotron pedal incorporated in the patch, you just send MIDI to it and connect it. There are options to shape a bit the sound you send for the best response.
It works flawlessly here, so I thought it might be useful.
