Tracklist Hide Credits

A1	–Alvin Lucier	Vespers
A2	–Robert Ashley	Purposeful Lady Slow Afternoon Vocals [Singer] – Barbara Lloyd, Mary Ashley, Mary LucierVoice [Speaker] – Cynthia Liddell
B1	–David Behrman	Runthrough
B2	–Gordon Mumma	Hornpipe

Credits

• A&r – Earle Brown
• Artwork [Album Design] – Ruby Mazur's Art Department
• Engineer [Original Recording] – Alvin Lucier, David Behrman, Gordon Mumma, Robert Ashley
• Liner Notes – Alvin Lucier, David Behrman, Gordon Mumma, Robert Ashley
• Mastered By – Gene Thompson

Notes

Has black & white instead of blue label, and "Promotional - Not for Sale" written on it.

Recorded at the Rose Art Museum Brandeis University.
Gatefold sleeve with photographs of the composers, and liner notes from each.

"The Sonic Arts Union formed in 1966 when Robert Ashley, David Behrman, Alvin Lucier, and Gordon Mumma decided to pool their resources and help one another with the performance and staging of their music. Since that time the group has performed extensively in the United States and has completed three tours of Europe."

Other versions

Category	Artist	Title (Format)	Label	Category	Country	Year
MS/5010	Sonic Arts Union	Electric Sound ‎(LP, Album)	Mainstream Records	MS/5010	US	1972
WER 6940 2	Sonic Arts Union	Electric Sound ‎(CD, Album)	Wergo	WER 6940 2	Germany	2010