Thought I'd try to use matrix to make quick-builds easier.

Midi files only preview in the first synth sound loaded, ie, I loaded a Z3TA synth in track 3, and a SI-Bass Guitar in track 4, but when i try to preview the midie/ptn files, I can only hear the previews using the Z3TA synth.

Can't I change the pitch of the loaded midi or ptn?

How can I edit the midi of the loaded midi or ptn?

Are you using the Media Browser ?

If you click on "Media" in the Media Browser, you can select the synth you want for previewing
(amongst those that are loaded).

Good tip... guess I didn't click enough... 

now if I can just get the midi and pitch issues understood???  
 It would be great to be able to just hit + or - to adjust the pitch, or right click on it for midi editing.

I figured out the first 16 tracks are unuseable...I noticed the matrix tracks are added as new tracks and I can drag a midi/ptn into the track and play/edit it.