Welcome to Interval Archive

An archive of the microtonal music journal INTERVAL and information by and about microtonal musicians. 

The Interval Archive is a compendium of *microtonal music-related compositions, articles, and letters during the years of Interval Journal 1978-1986, and up to the present writings, recordings, and activities.
Sections will be devoted to microtonal stalwarts Ivor Darreg, Harry Partch, Buzz Kimball, Erv Wilson, and others.

Interval Journal, Issue 1. Spring 1978. Cover features Ivor Darreg with his Megalyra.
Interval Journal, Issue 1. Spring 1978. Cover features Ivor Darreg with his Megalyra.

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Recent Uploads

Ivor Darreg posing with the Megalyra instrument. OMNI Magazine, May 1981, pages 46-47.
Ivor Darreg with Megalyra. OMNI Magazine, May 1981.
Uploaded April 2026
Jonathan posing with Wing and T Nunn's Mothra instrument.
Jonathan with Wing and T Nunn's Mothra.
Uploaded April 2026
Concert program cover for Tom Nunn solo performance at Sonic Arts Gallery, San Diego, October 15, 1988.
Tom Nunn. Concert program for New Instruments / New Music at Sonic Arts Gallery, San Diego, October 15, 1988.
Uploaded April 2026
Erv Wilson with Tubulongs instruments. Cover or feature from Interval journal.
Erv Wilson with Tubulongs. Interval Journal, Vol. 5 No. 3, Winter 1986–1987.
Uploaded April 2026
Educational display text and photo of tubulong metal pipe instruments in pythagorean and equal temperament tunings.
Exhibit documentation from the Tubulongs display at Sonic Arts Gallery. Text describes tubulong construction by Erv Wilson and Glen Prior, and tuning systems used in the instruments, March 1988.
Uploaded April 2026
Installation view of tubulong instruments displayed on wall at Sonic Arts Gallery.
31EDO Tubulongs exhibit installation, Sonic Arts Gallery I, March 1988.
Uploaded April 2026
Exhibition announcement for Tubulongs microtonal percussion instruments by Erv Wilson, Ivor Darreg, Glen Prior, and Jonathan Glasier.
Sonic Arts Gallery. Tubulongs exhibition announcement. March 1988. Features microtonal percussion instruments by Erv Wilson, Ivor Darreg, Glen Prior, and Jonathan Glasier.
Uploaded April 2026
Newspaper article about Sonic Arts Gallery with photo of Jonathan Glasier displaying musical instruments in downtown gallery.
Lianne Stevens. 'Zing Wheeze: Music to His Ears.' San Diego Union Tribune, March 13, 1988. Jonathan Glasier displays several musical instruments in his downtown Sonic Arts Gallery.
Uploaded April 2026
Jonathan Glasier experimenting with the Lumatone

Music Lessons

Personalized lessons in-person in San Diego or online anywhere you are. Learn vocal harmonics and 19edo microtonal practice with Jonathan Glasier, and anything about tuning theory and music history with Joseph Monzo.

Musical Instruments Gallery

Explore pictures and recordings of, and information about, microtonal instruments and their makers. Go to the gallery.