Song X is a collaborative studio album by American jazz guitarist Pat Metheny and saxophonist Ornette Coleman.

A remixed and remastered version was issued on CD in August 2005, titled Song X: Twentieth Anniversary.

"[11] DownBeat magazine hailed the album as "a remarkable union of the true and the new, a fusion of the bedrock human sound of Ornette's alto with the sometimes jarring, mostly bracing electronic capabilities of Pat's guitar-synth".

[12] Song X was voted the nineteenth best album of 1986 in The Village Voice's annual Pazz & Jop critics poll.

"[5] In his list for 2005 Pazz & Jop poll, he named its twentieth anniversary edition the sixteenth best album of the year.