BiaB, like most all other MIDI programs, does not use the MIDI "note-off" command, relying instead on Note Duration commands. This is common practice as the idea of a "note off" was implemented in the original MIDI Standard but was soon found to be superfluous data for every note as the Duration command takes care of the same thing.

Check your imported MIDI files for Note Duration data...

There's also the chance that this is Sustain data generated by a keyboard whose pedal cc command does not work as the old GM bang-bang, thus leaving Sustain on the whole time.

Matt -- Freeze one of those files and send an email with the file attached to the beta email address with explanation and the URL to this thread.


--Mac