The two albums were compiled on CD as Popcorn on the Castle Music label in 2000, omitting "Pipeline" and "Kappa Maki" from More Hot Butter and the two new tracks from Moog Hits.
"The Silent Screen (Hot Butter)" is credited to all the members except for Free, but it's actually an arrangement of the main theme of the first movement of Wolfgang Amadeus Mozart's Symphony No.
In addition to "Popcorn", another well-known track is August Msarurgwa's "Skokiaan", which was included on RE/Search's compilation album Incredibly Strange Music.
Stan Free (born Stanley Friedland) (April 12, 1922 – August 17, 1995) was an American jazz musician (pianist), composer, conductor and arranger.
Free was born in the Brooklyn borough of New York City in 1922, and received a classical musical education, studying with Alexander Siloti and also at the Juilliard School.
The Stan Free Trio played in many New York jazz clubs of the day, including The Composer, The Embers, The Living Room and Hickory House to name a few.