That seems really interesting. Rather than using such a tool for memorizing a tune, (because all the rest of the aural information helps remember and navigate the songs), there are bass parts that are buried in the mix or perhaps are doing something that is hard to 100% sus out with all the other things being very active going on as well.
I could see this working very well to sort out articulations and bass lines where the tones are felt a bit more than they're heard to give the songs not only the technically "right" notes like the recording, but also to impart feel. I'm thinking of some DMB stuff here. This includes parts where you KNOW the note but the tonal quality makes it hard to determine if unison octave lines, or one octave with a octave pedal or other processing. I say this from the perspective of trying to emulate, exactly as I can some country bass lines where the note higher up on the neck has real presence and energy as it should, but the bottom or the lower octave still sounds fairly present. Yes, I know Nashville modern recording may do lots of things as studio finesse, but I'm saying the tool can provide useful insights in a number of genres of bass playing, or so it would seem.