To get back to The OP's original question.

"In other words, what value is there in using the numeric notation that Charlie is describing? " ( In BIAB)

My answer is not much unless that is the system you usually use or someone who uses that system needs to read what you entered.

There are many good reasons for using NNS as has been discussed in this thread but to learn the system just for the purpose of entering chords into BIAB most likely is not worth the effort. I can say, learning the NNS is very easy if you already understand what the symbols mean in other systems.

Basic music theory is not difficult to learn if you have an internet connection. All you need to do is to be able to read and understand simple math terms. If you don't play an instrument or have some other music background then having some understanding of basic music theory is what you will need to acquire to create anything other than organized noise in BIAB.

Billy

New location, new environment, new music coming soon

Seize the moo-ment
If you feel like you’ve herd all these cow puns before, you probably have deja-moo