[3] He recorded a dozen albums under his own name,[4] and also performed and recorded with major jazz figures such as avant garde saxophonist Albert Ayler, pianists Bill Evans, Paul Bley and Marilyn Crispell, and as a part of Keith Jarrett’s “Standards Trio” with drummer Jack DeJohnette.

[6] DeJohnette once stated that he admired Peacock's "sound, choice of notes, and, above all, the buoyancy of his playing.

"[7] Marilyn Crispell called Peacock a "sensitive musician with a great harmonic sense.

"[7] Peacock was born in Burley, Idaho,[3] on May 12, 1935;[1] his father worked as a business consultant for grocery stores, and his mother was a homemaker.

'"[9] After graduating, Peacock attended the Westlake School of Music in Los Angeles but was then drafted into the Army.

[10] While stationed in Germany, he played piano in a jazz trio, but switched to bass when the group's bassist quit.

And since I was stationed in Germany and there weren't any bass players anywhere, it allowed me to be available to play sessions with different people in Frankfurt and the surrounding areas.

'"[12] After being discharged from the Army in 1956,[10] Peacock remained in Germany, playing with Hans Koller, Tony Scott, Bud Shank, Attila Zoller, and others, before returning to Los Angeles.

"[7] His bass playing at the time was influenced by Paul Chambers, Ray Brown, and Scott LaFaro, whom he befriended.

[14] He soon established himself as a bass player, participating in sessions with Barney Kessel and Art Pepper,[10] and, in 1962, recording with Don Ellis (Essence), Clare Fischer (First Time Out and Surging Ahead), and Prince Lasha (The Cry!).

He also married fellow musician Annette Peacock (they later divorced)[10] and began a musical association with pianist Paul Bley, with whom he would go on to record nine albums.

Initially dismissive, he soon changed his mind: "It challenged that fixed position I had about what jazz improvisation should be and what the rules are.

"[7] Peacock reflected on how his thinking began to change: I can remember when I was in Los Angeles about 1959 and I noticed that I was playing less time...

I simply started listening in myself to what a bass could do and I just began to intentionally play out of time, with some notions, some glimmers of what could be done.

[16]In 1962, Peacock moved to New York,[7] where he played with Bley and musicians such as Jimmy Giuffre, Roland Kirk, George Russell, and Archie Shepp.

"[9] In 1964, Peacock briefly joined Miles Davis' quintet, substituting for Ron Carter in April and May of that year.

[15] In 1964, Peacock joined Albert Ayler's trio, which also featured drummer Sunny Murray, and went on to tour and record with him, appearing on the groundbreaking Spiritual Unity album among others.

[7] Regarding Ayler, Peacock stated: I think he brought something that was so genuine and so natural and so authentic that it was unavoidable.

[19]Peacock continued to record with Bley, Williams (Spring, which also featured Herbie Hancock, Sam Rivers, and Wayne Shorter), and others until the late 1960s, when he began experiencing health problems.

I became a regular practitioner of macrobiotics and eventually moved to Japan for two and a half years, studying the language, history, and Oriental philosophy.

"[7] Reflecting on studying the Japanese language, he stated: "There is a great lack of personal pronouns... And the effect that has... is after a time, there is a sense of spaciousness that opens up internally and externally.

"[9] By 1970, while still in Japan, Peacock began to play again,[10] recording Eastward in Tokyo with pianist Masabumi Kikuchi and drummer Hiroshi Murakami, followed by Voices the next year.

In 1972, he returned to the United States and enrolled as a student at the University of Washington, where he studied biology, graduating in 1976.

This was followed by December Poems, which features four solo bass pieces and two duets with saxophonist Jan Garbarek.

"[14] Peacock also discussed the relationship between music and his daily practice of zazen (sitting meditation): I think music actually prepared me in some ways in coming to zazen, because it was the only window in my life where I felt kind of a spiritual or religious sense.

[22]Source: AllMusic[15] Tethered Moon Trio with Masabumi Kikuchi and Paul Motian With Albert Ayler With Paul Bley With Marc Copland With Marilyn Crispell With Clare Fischer With Toninho Horta With Keith Jarrett With Robert Kaddouch With Bud Shank With Tony Williams With others