F♯ A♯ ∞ (pronounced "F-sharp, A-sharp, Infinity") is the debut studio album by Canadian post-rock band Godspeed You!

Recorded at the Hotel2Tango in the Mile End of Montreal, the album, as became common for the band, is devoid of traditional lyrics and is mostly instrumental, featuring lengthy songs segmented into movements.

[4] The re-worked version of the album included several new sections, resulting in three movements and slightly over an hour of music, nearly doubling the previous runtime.

Each track features field recordings and sampled sounds, once referred to by David Keenan of The Wire as "eschatological tape loops".

The opening track, "The Dead Flag Blues", begins with an ominous spoken word introduction, which originates from an unfinished screenplay by guitarist Efrim Menuck.

This eventually develops into a Western-themed melody, and is capped off by an upbeat section which includes glockenspiel, violin, and slide guitar.

[1] The sermon slowly quiets, and is replaced with the movement "The Sad Mafioso...", an edited version of which appeared in the film 28 Days Later.

[12] The introduction features a vox pop interviewee who references "A Country Boy Can Survive" by Hank Williams Jr.[β] The speaker is quickly replaced with a cello piece accompanied by glockenspiel, violin, and horn.

Percussion is added to the melody which peaks, and is continued by a sample of Hazel Dickens singing "Gathering Storm", written by Mason Daring for the film Matewan.

The contents included an old handbill, the album's credit sheet, a picture drawn by guitarist Efrim Menuck, and a Canadian penny crushed by a train.

Guitarist David Bryant once referred to the packaging as a "jewel-cased CD monstrosity", preferring the original handcrafted record.

Inside of the case are liner notes and images, including the "Faulty Schematics of a Ruined Machine", the hand drawn picture by Efrim Menuck present in the record.

Stylus Magazine wrote that the record was "innovative and inventive" and that it "stakes out unique territory in a world overrun with hackneyed experimentation".

[13] Montreal-based Hour magazine said the lengthy tracks "could be really pretentious but the sounds [the band] make are way too cool to be merely coldly superior".

[13] Chart Attack magazine went on to rank the two-track record as #46 on their list of the top 50 Canadian albums of all time.

[10] Magnet commented that the three tracks can be "served up as staggering psychedelia for a headphone or surround-sound context",[12] voting it number 38 on their list of the best albums from 1993 to 2003.

[citation needed] The NME called it a "genuine classic", noting the variety of sounds present in the album.