Ornette Coleman, a self-taught alto saxophone player who polarized the jazz world with his unconventional "free jazz" before coming to be regarded as an avant garde genius, died on Thursday morning in New York at the age of 85, according to his publicist.

Ken Weinstein confirmed the death but said he would not be issuing any further information. Media reports said the cause of death was cardiac arrest.

Coleman's motto for his music, often uttered before starting his performances, was "I'd like to go out in space tonight." He would then launch into music that broke the limits of conventional bars, keys, chord changes and harmony.