Brooklyn Vegans Andrew Sacher said that the first side is "uneven and often disappointing", yet side two is "almost flawless". Track listing Producer credits are as noted on the original vinyl disc. Charles Manson's contributions to "Never Learn Not to Love" remain uncredited. Original vinyl 1990/2001 CD bonus tracks I Can Hear Music On December 7, 2018, Capitol released I Can Hear Music: The 20/20 Sessions, a digital-only compilation. Included are session highlights, outtakes, and alternate versions of 20/20 tracks, as well as some unreleased material by Dennis Wilson. It was released in conjunction with Wake the World: The Friends Sessions. The compilations were not issued on physical media due to the record company's wish not to interfere with the release of The Beach Boys with the Royal Philharmonic Orchestra. In 2021, I Can Hear Music was followed with Feel Flows: The Sunflower and Surf's Up Sessions. Personnel Per Craig Slowinski. This list does not include complete personnel credits for "Time to Get Alone" and "Cabinessence". The Beach Boys Al Jardine – vocals, acoustic guitar, handclaps Bruce Johnston – vocals, organ, handclaps, piano, Fender Rhodes Mike Love – vocals, handclaps Brian Wilson – vocals, piano, organ, Chamberlin, handclaps Carl Wilson – vocals, acoustic guitar, electric guitar, bass, handclaps, congas, tambourine (uncertain credit) Dennis Wilson – vocals, drums, handclaps, piano Touring musicians Ed Carter – guitar, bass Daryl Dragon – marimba, vibraphone Mike Kowalski – bongos, sleigh bells, snare drum Guests Marilyn Wilson – additional vocals on "Time to Get Alone" Diane Rovell – additional vocals on "Time to Get Alone" Additional session musicians Chuck Berghofer – upright bass Hal Blaine – drums Samuel Boghossian – viola Jimmy Bond – upright bass David Burk – viola Roy Caton – trumpet Pete Christlieb – tenor saxophone Alf Clausen – French horn Jack Coan – cornet David Cohen – guitar Alan Estes – percussion Virgil Evans – trumpet Jim Gordon – drums, timbales John Guerin – drums, woodblock, tambourine, sleigh bells Igor Horoshevsky – cello Raymond Kelley – cello Larry Knechtel – bass Fred Koyan – trumpet Willie Maiden – baritone saxophone Leonard Malarsky – violin Dick McQuary – baritone saxophone Roger Neumann – piccolo, flute, fife, tenor saxophone John Lowe – bass saxophone Glenn Lutz – trumpet Don Peake – guitar, electric bass, percussion Bill Peterson – trumpet Mike Price – trumpet Don Randi – piano, organ Joe Randozzo – bass trombone