Welcome tigerjp27,
I don't use Zeta, however, many synths, although having multiple outputs only have the ability to handle one input source track at a time. Zeta appears to be in that group.
To get Zeta to work with several tracks, you simply have to use a new instance of Zeta for each track. That will work. With Music Creator, you can have up to 8 instances of Zeta or 8 combinations of other synths at one time.
Most synths are of this singular input nature.
TTS, which is also in your MC6 DAW, is different...... it's a synth that WILL allow you to use up to 16 midi tracks, each assigned to a different channel in TTS, feeding just one instance of the synth TTS.
On my web site, under Recording & Music, MC, there are some things that you may find helpful on how to use TTS with several tracks of midi source. Scroll down to Advanced TTS set up.
Hope that helps.
post edited by Guitarhacker - 2013/11/14 07:48:49