Sorry, I have no idea. As I hinted in the original posting, I’m a techno-dinosaur.

I’ve found that the more complex the music is (and an orchestral piece would definitely fall into that category) the more errors there are in the transcription. Perhaps that isn’t surprising. A single instrument piece will yield the most accurate result.

Have you personally used it with any success?

Another highly-rated instrument isolating software is
Lalal.ai.

You might look at Moises, which can isolate different tracks, so you can hear on vocals, for example. I use it to erase drums to make drum cover videos. But I think it can do much more – isolate tracks, etc.