Sleep recorded "Dopesmoker" in 1996 at Record Two Studio in Comptche, California, with producer and engineer Billy Anderson, and the physical limits of that process are not incidental to what the record sounds like. They are the record. A reel-to-reel tape holds 22 minutes. A 63-minute song requires three reels. Guitarist Matt Pike recalled that "there was so much to memorize for that album, and we had to do it in like three different sections because a reel-to-reel only holds 22 minutes." The band went in for a month, went home to rehearse, and came back for another month. The seams that process left in the music, the slight shifts in density and momentum across the song's arc, are not flaws. They are the record breathing.

The band that walked into Record Two was Al Cisneros on bass and vocals, Matt Pike on guitar, and Chris Hakius on drums. No guests. No session players. The trio that had made "Sleep's Holy Mountain" in 1992 on Earache Records, toured Europe with Cathedral and the United States with Nik Turner's Hawkwind, and spent the intervening years writing a single hour-long song in motel rooms and at soundchecks. Billy Anderson, who had already worked with Neurosis and the Melvins, produced and engineered the sessions. He has described the album as "such a struggle and achievement," and the clarity of that pairing is the most honest thing anyone has ever said about it.

The guitar tone on "Dopesmoker" comes from a specific configuration that Anderson has documented in detail. For basic tracking, he used a Green Matamp with a Green 4x12 cabinet, mic'd with an SM57 and a Beyer M88. The main guitar signal ran through two full stacks: one driven by a Green Matamp, the other by a Green Matamp Combo amp on the front end with a Slave Unit power amp behind it. The amplifiers were built to be so loud that no one from the band could be in the same room while they were running. Anderson placed more than half a dozen microphones around them to capture the sound waves filling the space. For texture and dimension on certain passages, he added a third rhythm track recorded through a Pignose amp, opened halfway, with an AKG 414 in figure-eight pattern inserted into the open cabinet. Clean guitars went through the Matamp combo at low volume with a ribbon mic close and a room mic at distance. The result is a guitar sound that occupies physical space rather than a frequency range, a mass rather than a tone, and every mic placement decision Anderson made is audible in the way the riff seems to come from all directions at once.

The sessions were difficult in ways that went beyond the technical. The song kept changing. Pike noted that the band ended up with two or three different versions. The song had been developing through live performances since at least 1994, worked and reworked through years of touring and rehearsal, and in the studio it continued to move. Pike described the process: "the song was getting slower and slower and then it got weird. We started tripping out and second guessing ourselves." London Records had signed Sleep after "Holy Mountain" with the promise of complete artistic freedom and a six-figure advance. That advance went largely toward amplifiers and cannabis. When Anderson and the band completed the 63-minute single-track version and delivered it, London refused to release it. The label commissioned a remix from producer Dave Sardy and demanded edits. Sleep refused to compromise. The band dissolved. The unauthorized 1999 "Jerusalem" release, put out by The Music Cartel and Rise Above Records, ran 52 minutes and split the composition into six identically named sections. The band considers it unauthorized.

What London heard as a commercial liability was in fact the only honest outcome of the production choices the band and Anderson had made. A 63-minute song recorded in three tape sections, through amplifiers too loud for human proximity, in a studio in the California hills, with a producer who understood that the heaviness Sleep was after was a matter of physical presence, cannot be cut into radio-friendly pieces without ceasing to exist. The version of the record that finally came out on Tee Pee Records on April 22, 2003, is the only version the band considers authorized. Cisneros, who had felt the record should not have been released at all, acknowledged that the 2003 Tee Pee version was "the closest one that's come out of the four." Pike's position was simpler: "We did all the work so why leave it sitting around?" The 2012 Southern Lord reissue, remastered from the original studio tapes by Brad Boatright of From Ashes Rise, brought further clarity to what Anderson had captured, and Mojo gave it five stars, calling it "a benchmark by which all that dares call itself stoner rock must surely be judged."

The production philosophy behind "Dopesmoker" is indistinguishable from its compositional one. The tape format forced the band to internalize and perform a 63-minute piece in discrete sections, which demanded a level of structural commitment that most bands never approach. The amp configuration removed the players from the sound source, which means what you hear is the room's response to the guitar, not the guitar itself. The decision to record to analog tape rather than digital meant every splice was physical, every edit a commitment. Anderson and Sleep were making a document of a specific, extreme, fully realized idea, and the production choices they made were the idea. When Matt Pike left to form High on Fire with drummer Des Kensel and bassist George Rice, and Al Cisneros and Chris Hakius continued as OM, the music each took forward was shaped by what they had learned in Comptche. The weight, the patience, the refusal to resolve early. "Dopesmoker" sounds the way it does because the people who made it understood that some things cannot be shortened without being destroyed.