Airproofing

It is the sixth track of the 1976 album at 2:19, and opens the 2003 Blue Note compilation The Instrumentals: The Best of the Chrysalis Years at 2:18; Discogs, per a search summary, lists about 2:16 on one pressing. It was significantly reworked as "Airproofing II", or "Air Proofing Two", at 5:10 on A Shout Toward Noon. Which of the four studios cut the track is not documented, and we found no artist statement about it.

WNYC's New Sounds Vaults episode on Kottke, first aired on April 12, 1994 and hosted by John Schaefer, includes a live "Airproofing". Search results also show it opening the first set of a May 10, 2013 show, which we could not confirm. We do not know whether our upload is the original, the reworked version or a live take, and found no covers, samples or setlist.fm play count.