cubalibre,

Welcome to the forums.

The midi file opened like it did in RB because RB is more akin to a DAW.

BIAB is primarily designed for use as backing-creation software.

Because of this, when you load a midi file into BIAB, it still loads as individual tracks, just like in RB, but those tracks are located on either the Melody track or the Soloist track. The Drums, Bass, Piano, etc., tracks in BIAB are primarily reserved for BIAB and are used for backing creation.

To see each track individually, it's necessary to use Piano Roll mode and then select the channel. See the #1, #2, #3 on the image below.

Regards,
Noel

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MY SONGS...
Audiophile BIAB 2025