"I Bought a Flat Guitar Tutor" is a song by 10cc

10cc

10cc are an English art rock band who achieved their greatest commercial success in the 1970s. The band initially consisted of four musicians -- Graham Gouldman, Eric Stewart, Kevin Godley, and Lol Creme -- who had written and recorded together for some three years, before assuming the "10cc" name...

 appearing on their 1977 album, Deceptive Bends

Deceptive Bends

Deceptive Bends is an album released in 1977 by rock band 10cc.The departure of Kevin Godley and Lol Creme in 1976 to form Godley & Creme almost ended 10cc. However Eric Stewart and Graham Gouldman kept the group alive as a duo...

.

The song is quite short and often thought of as a novelty piece

Novelty song

A novelty song is a comical or nonsensical song, performed principally for its comical effect. Humorous songs, or those containing humorous elements, are not necessarily novelty songs. The term arose in Tin Pan Alley to describe one of the major divisions of popular music. The other two divisions...

 amongst fans. The lyrics to the song are all puns for musical terminology. Whenever Eric Stewart

Eric Stewart

Eric Stewart is an English musician, songwriter and record producer most known for his tenure with The Mindbenders in the 1960s, and 10cc from 1972 to 1995....

 or Graham Gouldman

Graham Gouldman

Graham Keith Gouldman is an English songwriter and musician who is a long-time member of British band 10cc.-Early life and 1960s pop career: 1946–1968:Gouldman was born in Broughton, Salford, England...

sing the name of a chord the chord is played as part of the music to the song. The chart below attempts to explain the complex idea.

• I bought A = A major (A C♯ E)
• [A] flat = A Flat major (A♭ C E♭)
• [A flat] diminished = A Flat diminished (A♭ Cb E♭♭)
• Responsibility (responsibilitE)= E Major (E G♯ B)
• You're de ninth = D9 (D F♯ A C E)
• Person to see = C Major (C E G)
• To be suspended = Bsus4 (B E F♯)
• in a seventh = A7 (A C♯ E G)
• [a seventh] major catastro- = A Major 7th (A C♯ E G♯)
• phe = E major (E G# B)
• It's a minor = A minor (A C E)
• point, but Gee = G major (G B D)
• [but gee,] Augmented = G augmented (G B D♯)
• [Gee, augmented] by the sharpness of your = G sharp augmented (G♯ B♯ D♯♯)
• See what I'm going through (C) = C Major
• A (A) = A Major
• to be (B) with you = B Major (B D♯ F♯)
• in a = A Major
• [in a] flat = A flat
• by the sea = C Major