the TTS synth is a cool one. You need to be sure the channel numbers are consistent all the way through.....
I did a tutorial on my web page.
http://www.herbhartley.co...edited_slimmer_005.htm go down to Advanced TTS set up and operation and do it step by step.
I explain how to set TTS up to run 3 different instruments at the same time. It will do 16 at the same time.
Be sure to set the channel, bank and patch in the midi track inspector. I think the mistake many people make is to set the bank/patch in TTS. It needs to be set in Cake's midi track and be sure the midi channel is also set in cake.
TTS should take it from there. Send all the midi track outputs to the same (one) instance of TTS and you should be set to go.