Allan Smethurst wrote this song and recorded it accompanying himself on the acoustic guitar, but it includes some sound effects, which appear to be jets passing by, and a little bit of bird twitter. Unfortunately, the studio where he recorded his dialect songs appears to have been on the flight path of Wattisham Aerodrome; in the song he laments that every time the jets fly over he has to start recording again.
The sheet music for "Sound Barrier" was published by Dick James Music at 3 shillings, and copyright 1967.
Suggestion credit: Alexander Baron - London, England, for above 2
John Lennon's lead guitar work on Yoko Ono's "Walking On Thin Ice" proved to be his final creative act. It was upon their return home after completing laying down the track that Lennon was murdered by Mark David Chapman.