Born in Feyetteville Arkansas 3/25/45. Father, John S. Glasier, music professor at the Univ. of Arkansas. Mother high School English teacher. Grew up in San Diego CA where father was in San Diego Symphony for 27 yrs. While in El Centro CA in 1948-9, Harry Partch, microtonal pioneer, lived with the family and introduced Jonathan to his amazing orchestra of just intonation string and percussion instruments. In 1965 Harry Partch returned to San Diego and Jonathan became his assistant, running errands and working on his instruments and in 1966, he played "Castor and Pollux" a sextet that is often performed with dancers, at Royce Hall at UCLA. Assisting Partch and developing improvizational chops with Papa John" were incredibly rewarding, as well a entering the music department at UCSD and assisting Partch there and subsequently graduating with a BA in Music. During this time he was working as a guitar teacher at La Jolla Music

After graduating I co-founded Making Music, a music school for all ages with a program for beginners, "The beginning Music Experience". This program used speech and rhythm to introduce students to music in a grassroots way. These kindergarteners learned rhythm on the bongos, melody on the recorder, and harmony on the baritone uke. During the twenty year period between 1965 and 1985, Jonathan and his father developed an improvising style on the guitar, piano and violin and viola. They made many tapes of their works, some of which are still available. It was during this time that Jonathan developed an improvising style that has served him in his music making throughout his musical life.

In 1975, Jonathan and five graduate students from UCSD, formed the "ID Project" (Improvization Development). This group performed in various venues for two years using newly developed instruments, many made of metal, balloons and wood. Some of these instruments, the wing, godzilla and harmonic cannon are used in Jonathan's current music making activities which include performing in the "Sonic Arts Ensemble" and recording projects in San Diego and Los Angeles. Jonathan has also co-produced recordings of microtonal music with members of the Xenharmonic Alliance including "Detwelvulate" a CD of music by microtonal pioneer Ivor Darreg music by the Xenharmonic Pioneers (15 CD's to date). This music was made by Jonathan Glasier, Bill Wesley, inventer of the Array Family of musical instruments and theory, Jeff Stayton, and Brian Mclaren, who edited most of the Cd's and developed the Ivor Darreg website.

In 1978, Jonathan founded the "Interval Journal of Music Research and Development". Realizing a need for a forum promote the ideas and music of a growing number of microtonal musicians, composers and instrument builders, Jonathan created this periodical and also founded "Interval Foundation", a non-profit organization to promote microtonal music and new instruments. Nineteen issues were published and are still available from this website. During the Interval years much music and colaboration was documented.

In the fall of 1987 Jonathan opened the first Sonic Arts Gallery. The hope was to garner enough support from the San Diego community to have a museum of sound and light. The instruments of Harry Partch were still in San Diego at San Diego State University, and there were plenty of people who were making instruments and playing them. The first show "Zounds" had instruments of Partch, Arthur Frick, Ivor Darreg, Tom Nunn, Jonathan Glasier and Richard Waters. There were also performances in the downtown San Diego site. After three years the site closed down and in 1993, moved to the community of Golden Hill, just East of Balboa Park where it remains today at 2961 Beech Street San Diego CA 92102. The Sonic Arts Gallery has gone through many metamorphases, and currently, with Joe Monzo and Denny Genovese, we are producing concerts here at the Sonic Arts Gallery as well as developing this site and operating an antique store which is open from Thursday through Saturday from 11am to 6pm. Also, every other Sunday we do an "Earth Chant" where we sing vocal harmonics and introduce people to Just Intonation music.