138. The tempo changes in my MIDI file disappear when I import it into Band-in-a-Box®.

This is intentional, because Band-in-a-Box® songs and styles all play at a constant tempo. There are a few ways that MIDI files can be used with Band-in-a-Box®, and most require that there not be any tempo changes, such as when you import the melody from a MIDI file to the Melody track, or interpret the chords from a MIDI file using File | Import chords from MIDI file. While Band-in-a-Box® can be used as a MIDI sequencer to some extent, if you are working with files that require tempo changes, we recommend using our dedicated MIDI sequencer PowerTracks Pro Audio. Note that in Band-in-a-Box® you can insert tempo changes at any bar by using the 'Edit Settings for Current Bar' dialog, however you can't have a gradual tempo change over a range of bars unless you reduce/increase the tempo bar-by-bar.

Alyssa - PG Music