The answer is yes, sort of. First realize UserTracks do not work with 3/4 time or holds at this point in time so if the multitrack song has holds or is in 3/4 time you likely would not achieve good results.

Now, let's say neither of those restraints are in the song then the answer is yes but you may not get the results you expect. BiaB and RealBand use pitch and time shifting technology to create notes that don't exist in the original audio material. Sometimes the original audio material morphs well but sometimes it don't. All of it may morph well except for a note or two. You just don't know until you try. That's part of the fun in creating UserTracks. Generally speaking audio material containing whole, half or quarter note audio will morph better than audio with eighth, sixteenth or smaller notes.

If you have a multitrack that contains predominantly audio built around the chords of G, C and D for instance it may not give you the results you expect when used in a song having a E, A and B chord progression.

If you are wanting access to specific riffs you can isolate the bars with the riff and import the bars as a loop. The same technology is in use its just that you are isolating the bars instead of BiaB or RealBand and you are providing pitch and tempo information while making the audio a loop instead of BiaB or RealBand using a SGU file as a lookup chart.

Jim Fogle - 2024 BiaB (1111) RB (5) Ultra+ PAK
DAWs: Cakewalk by BandLab (CbB) - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home