1977 injection lyric, composite Gilmour solos
Clean chords open Comfortably Numb, then a vocal that sounds answered from behind a wall. The song is a dialogue between a man who cannot feel his hands and the people trying to get him back on stage. The first guitar solo asks. The second stays up: long notes with nowhere urgent to go, which is how the track makes numbness audible instead of only describing it.
It sits on The Wall, released 30 November 1979, music by David Gilmour, lyric by Roger Waters, produced by Bob Ezrin with Gilmour and Waters. Sessions moved between Britannia Row in London, Super Bear in France and Producers Workshop in Los Angeles. Waters drew the lyric from a 1977 show in Philadelphia, when stomach cramps left him unable to perform until a doctor injected him and sent him back out, present in body and gone otherwise. Gilmour wanted the track barer. Ezrin wanted orchestra; Waters sided with Ezrin, so Michael Kamen’s chart sits under a song that had nearly stayed a blues. The famous second solo was not one lightning take. Gilmour recorded five or six, charted the best bars and edited a composite. The sense of one breath is construction.
In the stage show the song is a medical scene: a brick wall, a puppet doctor, Gilmour on a tower or behind the bricks, the solo as the clearest speech the character has left. Later tours kept the solo and dropped much of the plot. Crowds still go quiet for those bars, rare in rooms that size. The lyric is about being made fit to work. The guitar refuses the treatment.
I just went out into the studio and banged out five or six solos. From there I just followed my usual procedure, which is to listen back to each solo and make a chart, noting which bits are good.
(David Gilmour, Guitar World, 1993)

The quarrel over the arrangement is part of the listening now. You hear Waters’s cold scene and Gilmour’s warmth in the same bars without full agreement. Ezrin’s strings do not soften the injection story; they widen the distance. Radio edits pushed toward single length and could not cut the second solo without gutting the track. Without those bars it is a sketch of a crisis. With them it is the crisis, survived and not cured.
What remains is a solo audiences trust more than the plot. The Wall is a prison narrative. Comfortably Numb is the moment the prisoner takes the drug and the guitarist refuses to sound comforted. Decades of covers and tributes have tried to turn it into a ballad of connection. The 1979 record keeps its clinical frame: someone is being prepared to go on, and the notes say he should not have to.