As Jed51 stated in this thread from 2019, Start song either with or without Intro, you can’t send a CC to start a song on any part other than the intro (or uselessly, an outro, I’ve discovered) Only after an intro plays can you then change between the other parts. That seems to be why the intro plays even if a 113 is sent.
After a few more hours of trial and error investigation last night, I believe I determined one problem might be the way BB handles transitions, which users complained about in another thread, and the way the RC600 pedals sends changes.
By fiddling with different combinations of CTL and Assign on the 600, I got it to the point where if I press a pedal it will send the BB into the transition phase, but it will remain there, playing the same part, until I press it again. However, because of the crazy mappings in the 600, doing that usually entails some unexpected result, such as the 600 starting another track. As I said, there are other users, who are using other midi devices, complaining about the stuck transition phase, so at least we know it’s a BB issue and not only a 600 issue.
Even more maddening is that I’ve discovered that the 600 will send start messages EVEN WHEN ALL THE CC COMMANDS ARE TURNED OFF! I made sure all CTL and Assigns except Pedal 1 Mode 1 were off and that the Assign for Pedal 1 was NOT on CC, but when I pressed it, BB would still start!
As a former tech consultant for many years, I’m extremely methodical and patient when it comes to tech, but I do bristle when basic logic and user experience is ignored when designing expensive products. I find it difficult to believe that no one at Singular thought that musicians might want the flexibility to jump to various parts of a song. True, it might be difficult to do that by just using the pedal, but it should be a fairly simple process through Midi.
I may do a bit more experimenting today, but until Singular chimes in, I’m going to try recording the BB on the 600 as a backing track and then split up the parts on the 600. Not a good solution, because then what’s the point of having the BB other than the drum sounds? You don’t need it after dumping the drum track to the 600. Moreover, if two weeks from now I want to change a beat or two, I’d have to dump it again and probably rerecord backing tracks.
I’ll update the thread if I learn anything new today.