To start learning John Barry - (From Indecent Proposal) Indecent Proposal chords, build your understanding on these basic chords - G, Am, F, Dm, Am, Dm, C and Am in sequence. A good strategy is to initiate at 37 BPM and then accelerate to the track's regular speed of 75 BPM. With C Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.