Ivor Darreg
About Ivor Darreg
Ivor Darreg (1917–1994) was an American microtonal musician, composer, instrument builder, electronics experimenter, and writer associated with the development of experimental and xenharmonic music on the U.S. West Coast.
Darreg was known for designing and building experimental microtonal instruments, composing and recording music using alternative tuning systems, writing about xenharmonics and electronic music, and participating in the West Coast microtonal music community.
Brief Bio by Jonathan Glasier
Ivor Darreg was born and raised to age eighteen by his parents in Portland, Oregon. Ivor’s father was editor of a Catholic weekly in the Northwest, and there was plenty of opportunity for intellectual pursuits. At the age of seven, Ivor started playing the piano. His interest was fanned by his artistic mother (an oil painter), but his father never understood how important Ivor’s music was to him. From age eight, Ivor helped with the proofing of the weekly and was already reading a wide range of material by the age of ten.
It was at this time that Ivor began to develop his interest in foreign languages. Ivor’s father was on the textbook commission, and Dr. Schmidt, a friend of his father who was a professor of languages, taught Ivor German. Because of his father’s interest in French history, Ivor was exposed to the French language, and at age twelve, his mother was learning sculpture from a Russian, and Ivor learned the fundamentals of the Russian language. At fourteen, Ivor met the people who ran the Esperanto club of Portland, and at twenty-three he learned Spanish. Throughout the years, Ivor has done translations for a number of people, and his language prowess has often helped the editors of Interval.
But it was music that was to be the focus of this brilliant young man, and being of scientific bent, he was interested in the hows and whys of the nature of same. At age fourteen, Ivor began playing the cello, and his first trials at composition had already been tried by that time. As his interest and dedication to music grew, the rift between Ivor and his father grew, so that by the time Ivor was seventeen, he and his mother made a split from his father and there was very little contact thereafter. Ivor and his mother moved to San Francisco to rooming houses and hotels, and by this time Ivor had changed his name from Girard to Darreg (sort of a retrograde). Both Ivor’s father and his uncle, who was a bishop in Great Falls, Montana, had visions of Ivor being a priest and carrying on in the family religious tradition, but Ivor’s heart was elsewhere.
Ivor’s interest in the new field of electronics was growing at this time. It began when, at age eleven, Ivor heard the theremin played on the radio. At age fourteen he met a man with a ham radio licence and began learning about the fundamentals of electronics. This interest was fueled by magazines, acquaintances, and meetings with the Portland Ham Radio Club. Practicing with oscillators and listening to ring modulator effects spurred an interest that culminated in the building of the Electric Keyboard Oboe.
Instruments
Recordings & Media
- 1979 JanMoustache Blue – Ivor Darreg & Glen A. Prior, 1979

Articles & Writing
Bertrand Russell on Time Quanta Ivor Darreg, 1915 Jan
Radio News August 1932: Music from Electrons with comments by Ivor Darreg Ivor Darreg, 1932 Aug
Ivor Darreg on Schubert’s Unfinished Symphony and the Didesis, 1934 Ivor Darreg, 1934 Jan
Society of Native American Composers Concert Program, January 9, 1944 Ivor Darreg, 1944 Jan
Electronic Music and the Films by Ivor Darreg (Film Music Notes, 1946) Ivor Darreg, 1946 Jan
Electronic Music and the Films by Ivor Darreg (Film Music Notes 1946) p2 Ivor Darreg, 1946 Jan
Film Music Notes by Ivor Darreg, 1946 Ivor Darreg, 1946 Feb
The Hollywood 28 Weakly Newsance, March 18, 1946, Page 1 Ivor Darreg, 1946 Mar
The Los Angeles 7 Weakly Newsance, July 1947, Page 3 Ivor Darreg, 1947 Jul
The Los Angeles Weakly Newsance, December 1947, page 8 Ivor Darreg, 1947 Dec
The Weakly Newsance no. 8, March 1948, page 1 Ivor Darreg, 1948 Mar
The Weakly Newsance No. 12, December 1948 Ivor Darreg, 1948 Dec
The Weakly Newsance No. 12, December 1948, Page 1 Ivor Darreg, 1948 Dec
The Weakly Newsance No. 12, December 1948 Ivor Darreg, 1948 Dec
Different Orders of Order, 1949 Ivor Darreg, 1949 Jan
The Los Angeles Weekly Newsance Issue 14, August 1949 Ivor Darreg, 1949 Aug
Ivor Darreg’s List, October 1949: Electronics Workshop Tasks Ivor Darreg, 1949 Oct
Language Engineering by Ivor Darreg Ivor Darreg, 1950 Jan
Los Angeles Weakly Newsance No. 17, March 1951, Page 1 Ivor Darreg, 1951 Mar
The Weakly Newsance, Los Angeles 7, March 1951 Ivor Darreg, 1951 Mar
Peace and Unity: Essay and Poem by Wesley Newbern Ivor Darreg, 1951 Aug
The Weakly Newsance No. 19, February 1952 Ivor Darreg, 1952 Feb
The Los Angeles Weekly Newsance, February 1952, Issue 19, Page 8 Ivor Darreg, 1952 Feb
Weakly Newsance no. 22: Feedback (1955) Ivor Darreg, 1955 Nov
Creativity Report No. 1, 1956 Ivor Darreg, 1956 Jan
The Sounding Board: LA Times late 1957 (Ivor Darreg comments) Ivor Darreg, 1957 Jan
LA Times 1957 ‘Fidelity’ Comments in 1984 Ivor Darreg, 1957 Jan
The Los Angeles 7, July 1959, Page 5: List of Publications Ivor Darreg, 1959 Jul
The Theremin. Los Angeles 7 Weakly Newsance, July 1959 Ivor Darreg, 1959 Jul
The Weakly Newsance, July 1959, Issue 24, Page 1 Ivor Darreg, 1959 Jul
Quartertone Impressions by Ives-Nettl with Darreg Comments Ivor Darreg, 1960 Jan
Ivor Darreg. Observations of organ vs. piano, 23 March 1960 Ivor Darreg, 1960 Mar
23. Ivor Darreg. Observations on Piano Action and Performer Responsibility, 1960–1980 Ivor Darreg, 1960 Mar
The Weakly Newsance no. 26, June 1960, page 1 Ivor Darreg, 1960 Jun
F.C. Judd, Electronic Music and Musique Concrète – Review by Ivor Darreg Ivor Darreg, 1961 Jan
The Exposition Boulevard Exposé, December 1961, No. 29, Page 2 Ivor Darreg, 1961 Dec
Reprint from The Exposition Boulevard Expose ‘Definitions’ by Ivor Darreg Ivor Darreg, 1962 Jan
Ivor Darreg. Ballot vote, Moog Music Fall-Winter 1962. Ivor Darreg, 1962 Jan
Pitch-Bending as a Gateway to Non-Twelve-Tone Ivor Darreg, 1962 Jan
Ivor Darreg’s 31 EDO Frequency Chart with Erv Wilson’s Edits, December 1962 Ivor Darreg, 1962 Dec
31 Equal Division of the Octave Chart with Erv Wilson’s Annotations Ivor Darreg, 1963 Jan
The Exposition Boulevard Exposé No. 31, December 1963 Ivor Darreg, 1963 Dec
Self-Published Price List by Ivor Darreg (Spring 1964) Ivor Darreg, 1964 Jan
Art-O-Mation: Comment on Saturday Evening Post Article, 1964 Ivor Darreg, 1964 Jul
Self-Published Price List by Ivor Darreg, Winter 1965-1966 Ivor Darreg, 1965 Jan
Shall We Improve the Piano? Ivor Darreg Ivor Darreg, 1965 Jan
30. Ivor Darreg Comments on Pianos, 1965 Ivor Darreg, 1965 Apr
08. Product Engineering: ‘The Sound of Music—modernized?’ Article about Ivor Darreg, 1965 Ivor Darreg, 1965 Nov
Self-Published Price List by Ivor Darreg (1965-66) Ivor Darreg, 1965 Dec
Xenharmonic Bulletin I, March 1966 Ivor Darreg, 1966 Mar
Xenharmonic Bulletin No. 1, March 1966 (Reprint July 1977), page 1 Ivor Darreg, 1966 Mar
Xenharmonic Bulletins Table of Contents by Ivor Darreg Ivor Darreg, 1966 Mar
09. The Ex-Exposition Boulevard Exposé no. 35, September 1966 Ivor Darreg, 1966 Sep
List of Tape Compositions by Ivor Darreg, Up to March 1967 Ivor Darreg, 1967 Mar
The Translo Problem and Beyond It by Ivor Darreg Ivor Darreg, 1968 Dec
The Ex-Exposition Boulevard Exposé No. 37, November 1969–May 1970, Page 1 Ivor Darreg, 1969 Nov
Brain to Computer Interface: Quarter Tones in Western Music Ivor Darreg, 1971 Feb
Notes by Ivor Darreg. Compiled 2 May 1971, Reprinted 12 January 1981 Ivor Darreg, 1971 May
The Philosophical Attitude of Neutral Monism Ivor Darreg, 1971 Aug
Ivor Darreg’s Studio Bulletin, May 1972: About Pianos Ivor Darreg, 1972 May
Xenharmonic Bulletin No. 2, May 1974. Updating & Introduction to Tempered Temperaments Ivor Darreg, 1974 May
Xenharmonic Bulletin No. 3, November 1974, Page 1 Ivor Darreg, 1974 Nov
The Untempered Clavichord. Town & Country, 1974, with Ivor Darreg comments Ivor Darreg, 1974 Dec
Xenharmonic Bulletin No. 4, February 1975 Ivor Darreg, 1975 Feb
Xenharmonic Bulletin No. 5, May 1975: New Moods Ivor Darreg, 1975 May
The Notation Question. Xenharmonic Bulletin No. 6, September 1975 Ivor Darreg, 1975 Sep
Xenharmonic Bulletin No. 7, April 1976 – Fretting and Frets Ivor Darreg, 1976 Apr
28. Daniel Cariaga reviews Owen Jorgensen at Cal State Long Beach, with Ivor Darreg comments, Los Angeles Times, June 28, 1976 Ivor Darreg, 1976 Jun
Xenharmonic Bulletin No. 8, July 1976 Ivor Darreg, 1976 Jul
Xenharmonic Bulletin No. 9, October 1978, Page 1 Ivor Darreg, 1978 Oct
Xenharmonics: Exploring Microtonal Resources by Ivor Darreg, 1979 (from Exhibition Catalog) Ivor Darreg, 1979 Jan
Bertrand Russell Quote on Neutral Monism Ivor Darreg, 1981 Jan
05. Music is Food for Thought in Computers, New Scientist 1981 Ivor Darreg, 1981 Mar
Ivor Darreg on Xenharmonics, 1981 Ivor Darreg, 1981 Aug
Ivor Darreg notes on Xenharmonics, August 1981 Ivor Darreg, 1981 Aug
Another Way of Going Beyond The 12 Tones Per Octave Ivor Darreg, 1981 Aug
25. Press Release on J. Talbot Winchell’s Death, October 1981 Ivor Darreg, 1981 Oct
Xenharmonic Bulletin No. 10, December 1981, page 1 Ivor Darreg, 1981 Dec
Ivor Darreg. Treasure Mapping and the Like. Personal Notes. 26 June 1982. Ivor Darreg, 1982 Jun
Notes for Jonathan Glasier on 19-tone tuning and non-12 atonality, 1983 Ivor Darreg, 1983 Sep
Ammunition Against Dodekaphiles Ivor Darreg, 1983 Sep
Der Stern March 1984: ‘Where Piano and Violin Have Exhausted Themselves’ Ivor Darreg, 1984 Mar
Some Concepts Realized by Sound in Ivor Darreg’s Tapes, May 1984 Ivor Darreg, 1984 May
Relative Importance of some Equal Temperaments Ivor Darreg, 1984 Nov
The Byte Buyer: San Diego Computer Scene, 1985 Ivor Darreg, 1985 Jan
Ivor Darreg. Comments on Musical Establishment and Electronic Music. 1985. Ivor Darreg, 1985 Jun
22. LA Times article on Experimental Musical Instruments journal, with comments by Ivor Darreg Ivor Darreg, 1985 Sep
Ivor Darreg comments on German Article about Organ Pipes Ivor Darreg, 1985 Nov
Bill Irwin. Organ Workshop: A Quick Trip Through Musical Time. 1986. Ivor Darreg, 1986 Jan
Musical 6-6 Newsletter 1st Half 1986: Dialog on Commas and Key-Signatures Ivor Darreg, 1986 Jan
16. SD Union 1986-02-16 English Grammar by Michael Grant with comments by Ivor Darreg Ivor Darreg, 1986 Feb
06. Xenharmonic Bulletin No. 9 Addendum, June 1987 Ivor Darreg, 1987 Jun
06. Ivor Darreg. Addendum 1987 to Xenharmonic Bulletin No. 9. Page 2. Ivor Darreg, 1987 Jun
Music Under Attack From All Sides by Ivor Darreg Ivor Darreg, 1988 Jan
Defining One’s Terms by Ivor Darreg, June 1988 Ivor Darreg, 1988 Jun
Partch’s Pitches from Xenharmonic Bulletin 11, Page 1 Ivor Darreg, 1988 Jun
We Dare to Compare: List of Comparisons of Different EDO’s Ivor Darreg, 1988 Jul
Transpectra and David Scheirman Julian Recording Event 1982 Ivor Darreg, 1988 Aug
Using Two-Part Counterpoint for Non-Twelve-Tone Music Ivor Darreg, 1989 Jan
Attention Composers and Arrangers by Ivor Darreg Ivor Darreg, 1989 Jan
Xenharmonic Bulletins Table of Contents by Ivor Darreg Ivor Darreg, 1989 Jan
Xenharmonic Bulletins Table of Contents by Ivor Darreg, Sheet 2 Ivor Darreg, 1989 Jan
Xenharmonic Bulletin No. 11, Spring 1989, Page 1 Ivor Darreg, 1989 Mar
All Systems Go by Ivor Darreg, Xenharmonic Frontier Ivor Darreg, 1990 Jan
Ivor Darreg Personal Notes Ivor Darreg, 1990 Feb
Music Related Self-Published List by Ivor Darreg, Spring 1990 Ivor Darreg, 1990 Mar
Keyboard Magazine August 1990: On Synthesizer Market Decline Ivor Darreg, 1990 Aug
Summer Summary for the Interval Foundation, August 1990 Ivor Darreg, 1990 Aug
08. New Ways to Un-Temper by Ivor Darreg, August 1990 Ivor Darreg, 1990 Aug
Summer Summary 1990-08 by Ivor Darreg Ivor Darreg, 1990 Aug
Ivor Darreg’s Comments on Using Zeros in Microtonal Composition Ivor Darreg, 1990 Aug
Ivor Darreg. Observation on Musical Technology and the Piano Industry. 1990. Ivor Darreg, 1990 Oct
Ivor Darreg thoughts. 5 October 1990. Ivor Darreg, 1990 Oct
Estimate: Pianos Required to Perform Ivor Darreg’s 22 EDO Suite, 1990 Ivor Darreg, 1990 Oct
13. Interview with Raymond Kurzweil by Jim Bohannon, October 1990 — Ivor Darreg Comments Ivor Darreg, 1990 Oct
13. Ivor Darreg. Musings on Kurzweil. 1990. Ivor Darreg, 1990 Oct
The Electric Keyboard Drum Ivor Darreg, 1991 Jan
04. Ivor Darreg comments on San Francisco cable car sounds and urban noise, 1992 Ivor Darreg, 1992 Feb
Xenharmonic Bulletin No. 12, December 1992, page 1 Ivor Darreg, 1992 Dec
Darreg ARRAY Diagram, Op. 10 Cipher, rear view, c. 1995 Ivor Darreg, 1995 Jan
J. Talbot Winchell. Notes on Korzybski and non-identity, 1952–1958. J. Talbot Winchell, 1952 Jan
Research notes on aphasia and semantic order, 3 May 1958 J. Talbot Winchell, 1958 May
Erv Wilson. ID Keyboard Layout. December 13, 1962. Erv Wilson, 1962 Dec
Erv Wilson ID 1962-12-13 17 PT B Keyboard Layout Erv Wilson, 1962 Dec
Note from Erv Wilson to Ivor Darreg, Logarithms to the Base 2 of Numbers 1-64 Erv Wilson, 1964 Oct
29. Erv Wilson. 22-tone layout for Triple Bosanquet Homogenous Keyboard, 1964. Erv Wilson, 1964 Dec
The 41 system Assigned to the Bosanquet System Erv Wilson, 1965 Feb
Erv Wilson. 22 into 29 microtonal system study. June 19, 1969. Erv Wilson, 1969 Jun
Brian Hartzler. ‘Longing’ (origin unsure). Guitar composition, c.1976. Brian Hartzler, 1976 Jan
Dave Hill. Update – April 1990. Dave Hill, 1990 Apr
25. Bart Hopkin. EMI Cassette Project Guidelines, 1993. Bart Hopkin, 1993 Apr
Ivor Darreg Bio and Comment on Russolo Ivor Darreg
Ivor Darreg’s More Recent Musical Publications Ivor Darreg
Ivor Darreg Tapes That Explore Ivor Darreg
List of References on Tuning Systems and Scales Ivor Darreg
Greek Derived Words Pertaining to Music by Ivor Darreg Ivor Darreg
Ivor Darreg Definitions of Metachromatic and Xenharmonics Ivor Darreg
What is a Robot by Ivor Darreg (Leaflet No. 12) Ivor Darreg
General Semantics and Creativity by Ivor Darreg, Page 2 Ivor Darreg
Note from Ivor Darreg to Belle Mooney Ivor Darreg
Ivor Darreg. Personal notes on long-string instruments and electronic music, page 3. Ivor Darreg
‘New Moods’ by Ivor Darreg Ivor Darreg
‘No Muzak Maestro’ by Art Sidenbaum Ivor Darreg
‘Transfer’ by Ivor Darreg Ivor Darreg
Additional Information About Ivor Darreg Ivor Darreg
Applying Science and Technology in the Service of Art Ivor Darreg
Ivor Darreg. ‘Math Needs a New Voice’ Ivor Darreg
How to Translate Japanese Into Greek by Ivor Darreg Ivor Darreg
Interfacing Art and Science Ivor Darreg
Teen Tunes by Ivor Darreg Ivor Darreg
Ivor Darreg. Thoughts on microtonal music practice. Ivor Darreg
Ivor Darreg comments on faithful correspondent Paul Nami Ivor Darreg
Ivor Darreg on ‘The Future is Not What it Used to Be’ Ivor Darreg
Ivor Darreg Statement on Musical Instruments Ivor Darreg
Math, Music and Logic by Ivor Darreg Ivor Darreg
Other Music JI Group – Remarks by Ivor Darreg Ivor Darreg
The Beaufort Encipherment Ivor Darreg
Twelve Pitches are No Longer Enough by Ivor Darreg Ivor Darreg
Vyshnegradski’s Quartertone Harmony – Author’s Preface Ivor Darreg
Ivor Darreg. Background on the Megalyra Concept Ivor Darreg
Ivor Darreg Commentary on ‘The Meaning of a Literary Idea’ Ivor Darreg
Just Intonation Arrays: A Call for Generalized Keyboards Ivor Darreg
New Opportunities for the Musical Explorer Ivor Darreg
Where do I Start? Ivor Darreg Ivor Darreg
Xenharmonic Bulletins by Ivor Darreg Ivor Darreg
Brand Library Concert: Ivor Darreg and Erv Wilson. Interval Magazine Vol. II No. 2-3
EDOs 5–64: Major thirds analysis by Dave Hill Dave Hill
CD List: Role of Note Frequency Ratios in Musical Harmonies – Dave Hill Dave Hill
Fifths (5-64 edo) by Dave Hill Dave Hill
Major Thirds (5-64 EDO) by Dave Hill Dave Hill
Christmas postcard from Archbishop O’Hara, Kansas City
Self-Published Works
From about 1945 Ivor Darreg self-published his newsletter which changed names from time to time as he changed locations. Starting out with “Hollywood 28” and ending with “Ex-Exhibition Boulevard,” his “Weakly Newsance” which was never “weekly” but happened intermittently, was a grab-bag of personal stories along with musings about whatever was on his mind and frequent jokes and ads for his publications. Ivor was interested in many things but several topics interested him more than others. In the early fifties he wrote and lectured on “Creativity”. In the mid-fifties he developed the Numaudo code which could have been an international “language/code” for banks and investing.
A problem of finances, health and contacts kept holding Ivor Darreg back through much of his life. Finally when he moved to San Diego in 1984 he was more well known for his microtonal writings, musical instruments and compositions and lived a comfortablally in his last years.
Ivor’s Self-Published Newspapers The Los Angeles Weakly Newsance, Exposition Boulevard Exposé and EX-Exposition Boulevard Exposé were published from about 1944 to 1970. AT the end of that period he gradually shifted to on microtonal music and published 12 issues of the Xenharmonic Bulletin until 1991.
Letters
Ivor Darreg was a prolific correspondent. His letters in part, are here.
Photos
Performances & Exhibitions
Glen Prior Concert, Los Angeles City College, October 6, 1977 1977 Oct
Sound: An Exhibition of Sound Sculpture, Instrument Building and Acoustically Tuned Spaces. Full Catalog, 1979 1979 Jul
Interval Foundation Presents: The Microtonal Music of the Future Concert, 1979 1979 Jul
Sonic Arts Gallery Announcement of Opening by Jonathan Glasier Jonathan Glasier, 1979 Sep
Jo Ann Smith. ‘New World Concerts.’ Sound exhibit review, LAICA, 1981. Jo Ann Smith, 1981 Jan
Concert Review, “Microtonal” by Newband, 29 April, 1982 with note from Ivor Darreg in margin Edward Rothstein, 1982 Apr
Brand Library Concert: Ivor Darreg and Erv Wilson. Interval Magazine V.II #2–3 1986 Dec
Grand Opening of Sonic Arts Gallery I, September 17, 1987 1987 Sep
Grand Opening of Sonic Arts Gallery I, September 17, 1987 1987 Sep
Zounds exhibition opening announcement, Sonic Arts Gallery, September 1987 1987 Sep
Los Angeles Times, Sonic Arts Gallery, October 3, 1987 Hilliard Harper, 1987 Oct
Black Box Exhibit at Sonic Arts Gallery I 1988 — Instrument Labels 1988 Apr
Sonic Arts Gallery Spring Concert Series 1988 1988 Apr
Interval Players Summit Laboratories Concert Julian CA 1988 1988 Aug
Transpectra and David Scheirman Julian Recording Event 1982 1988 Aug
Transpectra and David Scheirman Julian Recording Event 1982 Ivor Darreg, 1988 Aug
Sonic Arts Gallery Fall 1988 Concert Series with Black Box Exhibit 1988 Sep
Sonic Arts Gallery Black Box Exhibit Fall Concert Schedule 1988 Sep
Sonic Arts Gallery Fall Concert Series 1988 Oct
New Sounds in New Shapes Exhibition Press Release, Hollywood Bowl Museum, 1992 Jonathan Glasier, 1992 Apr
New Sounds in New Shapes Exhibition, Hollywood Bowl Museum 1992 1992 Sep
New Sound in New Shapes Exhibition, Hollywood Bowl Museum, 1992 1992 Sep
Ain’t Misbehavin’ Bang on a Can American Festival of Microtonal Music, by Kyle Gann Kyle Gann, 1994 Nov
Sonic Arts Gallery II Concert Program: Brian McLaren, Jonathan Glasier, 1994 Jonathan Glasier, 1994 Oct
Sonic Arts Gallery II Concert Program, October 25, 1994 1994 Oct
ID Circuit Street Performance Promo, Sonic Arts Gallery II, December 2005 2005 Dec
21. Electro Acoustic Music Experience at Palomar College with Brink and Jonathan Glasier 2006 Nov
San Diego Microfest at the Kalimba Center for the Arts, 2016 2016 Jan
The Endless Scale Concert Program, May 23, 1978 — Ivor Darreg
Tubulongs: Microtonal Percussion Instruments Exhibition, Sonic Arts Gallery 1988
Compositions | Scores
Excursion Into the Enharmonic: On the Enharmonic Tetrachord Ivor Darreg, 1975 Feb
Excursion Into the Enharmonic: Prelude for Guitar in 19-Tone System Ivor Darreg, 1975 Feb
Excursion Into the Enharmonic: Prelude in 19, page 2 Ivor Darreg, 1975 Feb
Brian Hartzler. ‘Longing’ (origin unsure). Guitar composition, c.1976. Brian Hartzler, 1976 Jan
Prelude for Guitar With 19 Frets Per Octave Ivor Darreg, 1976 Jan
From just intonation exploration of 19 and 22 EDO temperaments Ivor Darreg
Mentioned in...
Viking Song example from Icelandic source Eggert Stefansson, 1933 Feb
Alma Savage Lecture Service Advertisement in Newsweek, December 6, 1948 1948 Dec
The Weakly Newsance, August 1951 Wesley Newbern, 1951 Aug
Futurism Short Dictionary of Literary Terms 1952 1952 Jan
The Not Common Bur. Los Angeles Weakly Newsance, February 1952 Jessie Waiters, 1952 Feb
Development of Creativity by Helen Lyle, Syllabus 1958 Helen Lyle, 1958 Dec
Ivor Darreg Personal Notes, July 21, 1960 1960 Jul
Erv Wilson 31 EDO Tuning Table 1963 Jan
Erv Wilson’s 41-Tone Matrix (A Stable, Just System) Erv Wilson, 1964 Oct
Logarithms to the Base 2 of Numbers 1-64 Erv Wilson, 1964 Oct
The 41 system Assigned to the Bosanquet System Erv Wilson, 1965 Feb
International Electronic Music Catalog 1967 Entry for Ivor Darreg 1967 Jan
Interval_a_Microtonal_Newsletter_Vol_I_no.1 1970 Jan
And It Comes Out Here – LA Times, August 12, 1979 Suzanne Muchnic, 1979 Aug
Interval Foundation Notes Fall 1980 and Spring 1982 Jonathan Glasier, 1980 Sep
Guitars of Tomorrow. Guitar Player Magazine, October 1982 Tom Mulhern, 1982 Oct
Tuning and Temperament Bibliography by Douglas Leedy Douglas Leedy, 1983 Apr
Interval Interview With French Composer Pierre-Jean Croset and His Lyra Jonathan Glasier, 1984 Jan
Experimental Musical Instruments, 1985 1985 Jan
Liszt discovery to 90 on the auction block; Composers discuss music of computers Charles Shera, 1987 Dec
Sound Sculpture exhibition at Sonic Arts Gallery, 1988 Ingrid Whitehead, 1988 Nov
Weekend of Musical Exploration at the Rim Institute, June 1990 1990 May
Ivor Darreg Obituary, San Diego Union-Tribune, February 16, 1994 1994 Feb
15. Some People Have Seen His Ghost Here, San Diego Reader, June 1995 Judy Henske, 1995 Jun
15. Some People Have Seen His Ghost Here, San Diego Reader 1995 1995 Jun
Improvitory Concert Series. Jonathan Glasier interview. SAGII Expresso, September 1999. Rick Heller, 1999 Sep
interval-journal-1
Marching to a Different Ratio. Computer Music Journal Vol. II No. 2, p. 7-8 Curtis Abbott
Some Quarter-Tone Impressions by Charles Ives (Ivor Darreg notes) Charles Ives
The Nineteen-Tone Instruments of W.A. Piehl and Tillman Schafer
Brand Library Concert: Ivor Darreg and Erv Wilson. Interval Magazine Vol. II No. 2-3
Computer Music Journal Vol. II No. 2: Marching to a Different Ratio Curtis Abbott
Ivor Darreg Bio by Jonathan Glasier Jonathan Glasier
List of Musical Compositions by Ivor Darreg
Ivor Darreg Selected Publications List
EDOs 5–64: Major thirds analysis by Dave Hill Dave Hill
CD List: Role of Note Frequency Ratios in Musical Harmonies – Dave Hill Dave Hill
Fifths (5-64 edo) by Dave Hill Dave Hill
Major Thirds (5-64 EDO) by Dave Hill Dave Hill
Microtone. Harvard Dictionary of Music (comments by Ivor Darreg)
Musical Encyclopedia ‘Microtonal’ by Hugh Davies, pp. 653 Hugh Davies
Christmas postcard from Archbishop O’Hara, Kansas City
Introduction by J.W. J. W.
Other
Bertrand Russell on Time Quanta Ivor Darreg, 1915 Jan
Radio News August 1932: Music from Electrons with comments by Ivor Darreg Ivor Darreg, 1932 Aug
Viking Song example from Icelandic source Eggert Stefansson, 1933 Feb
Ivor Darreg on Schubert’s Unfinished Symphony and the Didesis, 1934 Ivor Darreg, 1934 Jan
The Hollywood 28 Weakly Newsance, March 18, 1946, Page 1 Ivor Darreg, 1946 Mar
Alma Savage Lecture Service Advertisement in Newsweek, December 6, 1948 1948 Dec
The Los Angeles Weekly Newsance Issue 14, August 1949 Ivor Darreg, 1949 Aug
Futurism Short Dictionary of Literary Terms 1952 1952 Jan
The Los Angeles Weekly Newsance, February 1952, Issue 19, Page 8 Ivor Darreg, 1952 Feb
The Weakly Newsance No. 19, February 1952 Ivor Darreg, 1952 Feb
Creativity Report No. 1, 1956 Ivor Darreg, 1956 Jan
Development of Creativity by Helen Lyle, Syllabus 1958 Helen Lyle, 1958 Dec
Ivor Darreg. Observations of organ vs. piano, 23 March 1960 Ivor Darreg, 1960 Mar
23. Ivor Darreg. Observations on Piano Action and Performer Responsibility, 1960–1980 Ivor Darreg, 1960 Mar
Ivor Darreg Personal Notes, July 21, 1960 1960 Jul
The Exposition Boulevard Exposé, December 1961, No. 29, Page 2 Ivor Darreg, 1961 Dec
31 Equal Division of the Octave Chart with Erv Wilson’s Annotations Ivor Darreg, 1963 Jan
Erv Wilson 31 EDO Tuning Table 1963 Jan
Self-Published Price List by Ivor Darreg (Spring 1964) Ivor Darreg, 1964 Jan
Erv Wilson’s 41-Tone Matrix (A Stable, Just System) Erv Wilson, 1964 Oct
Logarithms to the Base 2 of Numbers 1-64 Erv Wilson, 1964 Oct
Self-Published Price List by Ivor Darreg, Winter 1965-1966 Ivor Darreg, 1965 Jan
Shall We Improve the Piano? Ivor Darreg Ivor Darreg, 1965 Jan
30. Ivor Darreg Comments on Pianos, 1965 Ivor Darreg, 1965 Apr
Self-Published Price List by Ivor Darreg (1965-66) Ivor Darreg, 1965 Dec
Xenharmonic Bulletin I, March 1966 Ivor Darreg, 1966 Mar
Xenharmonic Bulletin No. 1, March 1966 (Reprint July 1977), page 1 Ivor Darreg, 1966 Mar
Xenharmonic Bulletins Table of Contents by Ivor Darreg Ivor Darreg, 1966 Mar
09. The Ex-Exposition Boulevard Exposé no. 35, September 1966 Ivor Darreg, 1966 Sep
List of Tape Compositions by Ivor Darreg, Up to March 1967 Ivor Darreg, 1967 Mar
The Ex-Exposition Boulevard Exposé No. 37, November 1969–May 1970, Page 1 Ivor Darreg, 1969 Nov
Notes by Ivor Darreg. Compiled 2 May 1971, Reprinted 12 January 1981 Ivor Darreg, 1971 May
Xenharmonic Bulletin No. 3, November 1974, Page 1 Ivor Darreg, 1974 Nov
Xenharmonic Bulletin No. 4, February 1975 Ivor Darreg, 1975 Feb
Xenharmonic Bulletin No. 7, April 1976 – Fretting and Frets Ivor Darreg, 1976 Apr
Xenharmonic Bulletin No. 8, July 1976 Ivor Darreg, 1976 Jul
Xenharmonic Bulletin No. 9, October 1978, Page 1 Ivor Darreg, 1978 Oct
25. Press Release on J. Talbot Winchell’s Death, October 1981 Ivor Darreg, 1981 Oct
Xenharmonic Bulletin No. 10, December 1981, page 1 Ivor Darreg, 1981 Dec
Ivor Darreg. Treasure Mapping and the Like. Personal Notes. 26 June 1982. Ivor Darreg, 1982 Jun
Tuning and Temperament Bibliography by Douglas Leedy Douglas Leedy, 1983 Apr
Some Concepts Realized by Sound in Ivor Darreg’s Tapes, May 1984 Ivor Darreg, 1984 May
Relative Importance of some Equal Temperaments Ivor Darreg, 1984 Nov
Ivor Darreg. Comments on Musical Establishment and Electronic Music. 1985. Ivor Darreg, 1985 Jun
Ivor Darreg comments on German Article about Organ Pipes Ivor Darreg, 1985 Nov
16. SD Union 1986-02-16 English Grammar by Michael Grant with comments by Ivor Darreg Ivor Darreg, 1986 Feb
06. Xenharmonic Bulletin No. 9 Addendum, June 1987 Ivor Darreg, 1987 Jun
Attention Composers and Arrangers by Ivor Darreg Ivor Darreg, 1989 Jan
Xenharmonic Bulletins Table of Contents by Ivor Darreg Ivor Darreg, 1989 Jan
Ivor Darreg Personal Notes Ivor Darreg, 1990 Feb
Music Related Self-Published List by Ivor Darreg, Spring 1990 Ivor Darreg, 1990 Mar
Keyboard Magazine August 1990: On Synthesizer Market Decline Ivor Darreg, 1990 Aug
Summer Summary for the Interval Foundation, August 1990 Ivor Darreg, 1990 Aug
Ivor Darreg. Observation on Musical Technology and the Piano Industry. 1990. Ivor Darreg, 1990 Oct
Ivor Darreg thoughts. 5 October 1990. Ivor Darreg, 1990 Oct
Estimate: Pianos Required to Perform Ivor Darreg’s 22 EDO Suite, 1990 Ivor Darreg, 1990 Oct
13. Interview with Raymond Kurzweil by Jim Bohannon, October 1990 — Ivor Darreg Comments Ivor Darreg, 1990 Oct
13. Ivor Darreg. Musings on Kurzweil. 1990. Ivor Darreg, 1990 Oct
04. Ivor Darreg comments on San Francisco cable car sounds and urban noise, 1992 Ivor Darreg, 1992 Feb
Xenharmonic Bulletin No. 12, December 1992, page 1 Ivor Darreg, 1992 Dec
Ivor Darreg Obituary, San Diego Union-Tribune, February 16, 1994 1994 Feb
Ivor Darreg Bio by Jonathan Glasier Jonathan Glasier
List of Musical Compositions by Ivor Darreg
Ivor Darreg Selected Publications List
Ivor Darreg Tapes That Explore Ivor Darreg
Ivor Darreg Definitions of Metachromatic and Xenharmonics Ivor Darreg
Microtone. Harvard Dictionary of Music (comments by Ivor Darreg)
Spring Flowers Poem by Yvonne Darreg Yvonne Darreg
Introduction by J.W. J. W.
Note from Ivor Darreg to Belle Mooney Ivor Darreg
Ivor Darreg. Personal notes on long-string instruments and electronic music, page 3. Ivor Darreg
Additional Information About Ivor Darreg Ivor Darreg
Ivor Darreg. Thoughts on microtonal music practice. Ivor Darreg
Ivor Darreg comments on faithful correspondent Paul Nami Ivor Darreg
Ivor Darreg on ‘The Future is Not What it Used to Be’ Ivor Darreg
Ivor Darreg Statement on Musical Instruments Ivor Darreg
Other Music JI Group – Remarks by Ivor Darreg Ivor Darreg
The Beaufort Encipherment Ivor Darreg
Ivor Darreg Commentary on ‘The Meaning of a Literary Idea’ Ivor Darreg
Xenharmonic Bulletins by Ivor Darreg Ivor Darreg