The Allmusic review by Stephen Thomas Erlewine awarded the album 3 stars and stated "Moon Rappin' is one of Brother Jack McDuff's most ambitious efforts, a loose concept album that finds the organist exploring funky and spacy soundscapes... It's not strictly funky -- it doesn't have the grit of early Brother Jack records, nor does it swing hard -- but it proves that McDuff was as adept in adventurous territory as he was with the groove".[3]
Recorded at Soundview Recording Studio in Kings Park, New York on December 1 (track 1), December 2 (track 2), December 3 (track 3) and December 11 (tracks 4 & 5), 1969.
