20+ year user of Cakewalk (SONAR Platinum--not the Bandlab version yet), and I used to convert MIDI tracks to audio in bulk all the time with "Bounce to track(s)"...but it has been ages.
 
I select my MIDI tracks and the TTS-1 that they are pointed to, go to the Track menu and select "Bounce to Track(s)" and get an error message that there is no audio to bounce.  What am I doing wrong?  I'm wanting to bounce my half a dozen or so MIDI tracks to become half a dozen audio tracks (down below, as in MIDI Tracks 1 to 6 become Audio tracks 21 to 26, for instance).
 
I'm embarrassed that I can't get this figured out...  Thanks in advance.

I find the easiest way to do this is to freeze the tracks, create some blank audio tracks, then copy the audio over.
 

I have 20+ tracks I want to do this with.  That's more labor-intensive than I wanted.  I remember I USED to convert half a dozen or more tracks at a time into multiple new audio tracks.  Just not able to get this done--nor find info on doing it that still works.  Driving me crazy!  :-) 

jerrypettit
I have 20+ tracks I want to do this with.  That's more labor-intensive than I wanted.  I remember I USED to convert half a dozen or more tracks at a time into multiple new audio tracks.  Just not able to get this done--nor find info on doing it that still works.  Driving me crazy!  :-) 

 
Couple of questions...
1. Have you got multiple instances of TTS-1, or one per track; and
2. Are you wanting individual audio tracks for each track, or a stereo mix of them all ?

I do have multiple instances--and I know I have to be careful with that.  Maybe 6 tracks per instance.
 
I definitely want INDIVIDUAL audio tracks, so that I'll have more control come mix time.  

TTS-1 has a maximum of 4 stereo outputs, so you want to limit the number of MIDI tracks going into it to 4.
 
Assuming you created the TTS-1 with the "All Synth Audio Outputs: Stereo" option selected, when you freeze the TTS-1, it will create 4 new audio tracks. Otherwise, you'll get a single stereo mix in a new track.
 
If you didn't use the "All Synth Audio Outputs: Stereo" option, then you've got two choices (and both are labour intensive):
 
Option 1:
(i) Insert a new TTS-1 with that option selected;
(ii) re-route some of your existing tracks to that instance; 
(iii) delete the original TTS-1 instance
Then you can use Freeze to quickly create 4 tracks
 
Option 2:
(i) Individually solo each track
(ii) freeze the synth, then copy the audio track to a new track.
(iii) repeat until you've got all your tracks.
 
Personally, I'd choose option 1, as once you've set it up properly you've only got a few clicks to create your audio tracks.
 
For example, say you've got 20 tracks, with each group of 4 tracks going into one of 5 x TTS-1's.
You need to press Freeze on 5 TTS-1's to get your audio tracks, so 5 clicks and it's created 20 mixed down audio tracks for you.
 
Another approach would be to write a CAL script to do the manual steps in option 2. I used to do this when I mixed down hardware MIDI synths.
 

I ended up doing it with Freeze after Freeze after Freeze.  I thought I'd remember being able to do almost unlimited tracks "back in the day".  Perhaps my memory is slipping.  Thanks for the help!

Click on the track number of the TTS-1 to select all the Midi tracks and the dummy audio tracks, then bounce...if you aren't selecting the blank audio track you'll get the error your seeing.
 
Bill

Confirming you need to select the source audio track along with your midi track to succeed with the bounce.

"Click on the track number of the TTS-1 to select all the Midi tracks and the dummy audio tracks, then bounce...if you aren't selecting the blank audio track you'll get the error your seeing." Cookie Jarvis  &  "Confirming you need to select the source audio track along with your midi track to succeed with the bounce."  Chris.R !!!!!!!!!!!!!!!!!!!!!!!!!!        VERY IMPORTANT INFORMATION!!!!! this is the KEY!!!!!!!