Hi Charlie
Please don't get me wrong - I'm really not knocking BIAB and I can see that it is an incredible piece of music software and I am delighted to have it. I did understand the concepts and mechanics of creating a backing track in about 5 minutes although I'm certainly not completely proficient after a day on BIAB. Perhaps I'm one of those people who can say "When god gave out brains,I thought he said trains, so I asked for a small slow one."
I also think that at your level of proficiency it seems (and is) very easy to produce a basic backing track. I know that things that seemed impossible at first now seem easy and when I think of the problem I had at the time I think "Derr".
I've just finished a backing track for a piece of music by O'Carolan and thoroughly enjoyed it. No doubt I shall be asking for help again soon.
Narayano