Here's a status update...

I fixed one of the problem imported MIDI files by going to the affected channel imported into the BIAB Melody Track (there is more than one channel that was imported into the Melody Track), and I appended the #121 All Controllers Off message (value = 0) at the very end on that channel. That stops the Pitch Bend problem that was happening with that channel on replay.

With the other problem imported MIDI file, that trick didn't work! That song needed 10 imported channels to capture the total sound effectively, so I initially imported 3 into the Melody track and the other 7 into the Soloist track. The pitch bend problem is on one of the 3 channels within the Melody track. What I've done is move the 2 channels that are not having problems from the Melody track into the Soloist track, so that I have isolated the problem channel all by itself in the Melody track. I then reverted the Melody track back to single channel mode, which makes it easier to work on the problem channel. The only thing which "fixes" this imported file, is to manually send the GM Mode On message from BIAB to the SD-50 before replaying the song, which, according to what the MIDI monitor displays, is that a #122 Local Mode ON message (value =0) is sent out on all 16 channels to the SD-50. I tried embedding a #122 message at the beginning of the problem channel, but that also didn't fix the pitch bend problem on replay.

That problem channel does have an embedded patch change for about 16 bars within it, after which it changes back to the primary patch. So, I might try following the suggestion to delete all the embedded patch instructions on that channel, and have the changes made by BIAB using the bar settings function (which you can only do if the Melody Track is not in sequencer mode).

In the meantime, I have an another "almost-as-good" MIDI file for that song, which I have imported with no problems. But, I still want to play around to see if I can fix the problem file.

FYI, I did find one web page with some helpful MIDI info here:

http://home.roadrunner.com/~jgglatt/tech/midispec/ctllist.htm

I'll report back after I try the patch change modifications.

Dave R.