The song was written by the band's guitarists Stuart Braithwaite and John Cummings and bassist Dominic Aitchison prior to the 1997 Mogwai Young Team recording sessions.
[2] "Tracy" received mostly positive reception from music journalists, with album reviews praising the song's quiet dynamics, the usage of varied instrumentation, and the inclusion of the sampled prank calls.
Hardie, who was in a bookmakers at the time of the call, suggests that Bulloch and Paul Savage continue mixing the song, and says he will try to contact Braithwaite.
Lee Harvey of Vox praised to the song's quiet dynamics and soft timbre, stating that it "stoutly [refuses] to rock out and accordingly [retains] a helium-light touch.
"[11] Bryan Adair of Prog Archives praised the song's individuality from the rest of the album, describing it as "slow but utterly gorgeous .
[relying] on a very different tone than the rest of the album" also comparing it to a film score, noting that it "[bore] resemblance to music from a sad movie scene.