From the sleeve;
Recorded at Winterland, San Francisco, Marin Civic Centre, San Rafael, California.
Island Music Centre, Commack, Long Island, New York, State University of NY at Plattsburgh, Wally Heider's Mobile Recording Truck, California and the Fedco Recording Truck, NY.
(Live Recording) Engineers; Ray Thompson, Chris Kimsey and Eddie Kramer.........blah blah.
Remixed at Electric Lady Studios, NY by Chris Kimsey and Peter Frampton.
Mastered at the Mastering Lab, Los Angeles by Mike Reese.
Apart from the "Live Recording" comment, there is no reference to how the recording was done, although that could be taken to imply that some studio work was on the album.
