I Hear a Symphony peaked at number 8 and remained on the Billboard 200 album chart for 55 weeks While originally issued in both mono and stereo versions, several of the tracks on the released stereo edition of I Hear a Symphony were sourced from mono mixes.[4]
Expanded edition
On September 21, 2012, Universal Music Group released I Hear A Symphony: Expanded Edition, a two-disc limited edition re-release. Disc one contains the digitally remastered original mono and stereo editions of the album, with most of the stereo edition being sourced from an alternate 1966 master done in true stereo as opposed to the original stereo LP release of the album.[4] Also on disc one are alternate vocals and extended mixes, and an additional song "All Of A Sudden (My Heart Sings)," recorded for (but not included on) the original album. Disc two features a complete unreleased live show recorded at the Upper Deck of Detroit's Roostertail night club on September 26, 1966.
Chronology(The band's name history: The Primettes 1959–1961 / The Supremes 1961–1967 / Diana Ross & The Supremes 1967–1970 / The Supremes 1970 / Diana Ross & The Supremes 1970 / The Supremes 1970–)