I start out with two identical piano MIDI tracks.  I  split them such so the first verse is on Track 1 ... the second verse on Track 3 the third on track 1 again.  I want to change the instrument on Track 3 from a piano to (let's say) an oboe so it plays back the second verse as an oboe and then reverts to a piano for the third verse. I have the tracks outputted to the TTS-1 Soft Synth.  Help!!  I can not seem to figure out how to get the third track to play back in an oboe'esque manner!

guess you found out you needed another instance of tts-1.

dlion16
guess you found out you needed another instance of tts-1.
 

Actually the solution I found appeared to be a temporary one. I used only one TTS-1 and assigned the Midi Channel ( for track three for example) to Cakewalk Midi Channel 3.  Then, while play back was active (and only while active), I assigned the bank to play an oboe (for example) instrument and an oboe is what I heard!  Once the track had run its course the "oboe" reverted to a piano instrument. This remains a mystery to me.  However, your note suggests that If I dedicate a TTS-1 Soft Synth to Channel 3 the Oboe instrument will remain.  I'll try that! 
 

If you use the inspector to send program changes to  your synth, it will change but if your midi has embedded program changes in it, it will revert when you rewind and hit that PC message.
 
You can strip it out, find it in list view, or change it to what you want.
 
You can usually embed the new PC, have to look that one up though, I'm not that up on X3
 
 

dlion16
guess you found out you needed another instance of tts-1.

Yes, i think the easiest solution is to just add another instance of tts-1 for each instrument.  You don't need to add a third track for your second piano verse, all the piano can be on one track.

Yah, TTS-1 has 16 channels you can assign to anything that's in it's patch library (which I think is GM2). 
 
I use it all the time as a piano patch on ch1 for writing, and an oboe patch on ch2 which I use for vocal melodies. 

Why would anyone use multiple TTS-1s to do a simple thing like polyphony? TTS-1 is polyphonic. That is what channels are for.
 
Yes TTS-1 is GM2. It is based on the Roland Sound Canvas. Anything that plays well on a Sound Canvas will also play well on the TTS-1.
 
You can insert a program change with the List view.

John
Why would anyone use multiple TTS-1s to do a simple thing like polyphony? TTS-1 is polyphonic. That is what channels are for.

How does one prevent a track whose instrument has been changed from defaulting to its original setting e.g., from piano to oboe and reverting to piano.  Logic suggests that it should not revert but techno-logic suggests that somehow that is what must happen.  Of course I may be doing something wrong! 

Okay... I'm not MIDI/synth guy but couldn't you just use the same instance of TTS-1, use the Cut edit option for the section you want the oboe for, paste it into a new Simple Instrument Track (or MIDI/audio pair) and set that track to feed the appropriate channel for the oboe sound?
 
Seems like that would be preferable for mixing purposes anyway. An oboe is not something you want to mix/apply effects to like a piano.

You only need one instance of TTS-1 per 16 channles of MIDI.
You can go to the TTS-1 GUI and right click the channels to change the instruments or use the track inspector.
You will need to take each track and change it's channel.  Don't forget CH10 is for drums.
If this is not your own midi track and you have downloaded it off the internet, it may have a PG imbedded in the file.
Look in the event list first. Toggle the notes off for a quick overview of other data. But Sonar often hides this data and it doesn't always show on the list. 
My only solution so far is to open the MIDI file in another midi sequencer ( Cubase) and remove this hidden data there. It seems to be a Sonar Bug to hide this PG change data from the event list where it belongs.
 
Sometimes slip editing the start of the track to a hair before the first midi note will stop the PG from triggering the change. But this won't work if the PG is in the middle of the song.
 
 
If the track is a download and it keeps reverting to an oboe it will not matter how many versions of TTs-1 you use, they will all revert. I guess it's possible for you to have somehow put the PG info in your own track, but this has never happened for me, it's always a download file.