The idea that the content of the music is programmatic, or entirely a product of the everyday 1940s New York City experience, is almost always associated with the piece. According to a 1940 interview with Ellington, it was inspired by everyday noises heard in New York City, specifically the namesake,
air shaft, found between housing units. A program for
Harlem Air Shaft, published by Richard O. Boyer in
The New Yorker in 1944, was apparently provided by Ellington while the band was traveling. Yet, the narrative as provided by Ellington, while reflected in the title, is controversial; there is no evidence of a program written prior to the piece, and Ellington in later interviews appeared to embellish the details of the piece's narrative. Furthermore, there is a possibility that the piece was originally titled
Once Over Lightly, a phrase written by Ellington on the original score. ==Critical reception==