Issues with extra MIDI track being created in AKse

问题:

I've been trying to solve a mystery sinewave issue with little success. I'm starting a new question here as I think I have dug into the specifics of this problem.

When setting up an AKSequencer, and feeding it a MIDI file, I'm seeing some strange results.

For a 4 track song (with a corresponding 4 track midi file, duration matching all stems of the song), I'm seeing that the sequencer is actually generated with 5 tracks. What is the extra track?

Also, I'm getting an error in the console:

[seq] 1026: Invalid beat range

which I believe happens when the track is empty.

So this looks like the culprit for my mystery sinewave.

Any ideas on how I can fix this? It's been driving me a little crazy...