It looks like Snocap is no longer allowing pieces beyond 15 minutes. Hmm. The method I have set up with Secondtunes now, however, does seem to work in providing a full length performance.
I record the live performances, edit out my commentary, compress the file, generally give it an all around polishing, and finally upload it to the store. The problem is that they generally last 50-60 minutes.
So, it looks like most of the full length shows will now have to be sold in-game, and only the shorter individual pieces will be available in the Snocap store.
C’est la vie.