Furthurmore Friday Week 22

(3.5.2010) For the 22th Furthurmore Friday, we had the following contest:



The original recordings for this Grateful Dead album were scrapped when a new recording format was invented mid-way through the recording process. What album was it, what was the original recording format, and what was the newly-invented format that inspired the re-recording?

Of the first ten correct answers (Aoxomoxoa, first recorded to 8-track 1" tape, then re-done with the new 16-track 2" tape), August S. was chosen at random & won a Furthur Winter Tour poster.