Very late to the conversation but just found this. I was at this gig largely because of the Wyatt connection. Bley had an enormous synthesizer set up with wires all over the place, and Annette was altering her voice through another mass of wires and microphones. The whole thing had a considerable impact on my 18 year old brain - particularly 'Touching' which was extraordinary.
About time I actually posted something after months of lurking.
I have a copy of the standard issue (without the handpainted cover) that I think is worth around $750. I used to run a record mail order in the UK in the mid 70s to early 80s and even by then both versions were impossible to find, although we could get sometimes get copies the second volume - Nommo. My memory is a bit fuzzy but I think there were only a few hundred pressed of the Yale concert.