Dionne Warwick’s first US Top 10 single, “Anyone Who Had a Heart” (1964), was written by frequent Warwick collaborators Burt Bacharach and Hal David. Burt Bacharach, in Record Collector magazine, stated “‘It’s very rich, it’s very emotional. It’s soft, it’s loud, it’s explosive. It changes time signature constantly, 4/4 to 5/4, and 7/8 bar at the end of the song on the turnaround. It wasn’t intentional, it was all just natural. That’s the way I felt it.’
According to AllMusic, Bacharach “‘never bothered counting the bars, regarding seeing whether or not there were eight bars in the first section, etc. He once said: ‘I never paid any attention to a changed time signature. I think it was Dionne who told me the turn-around bar was in 7/8. She counted it out, and I couldn’t believe it. It wasn’t intentional, that’s just the way it came out.'” (Songfacts).
The verses are in A minor; the choruses (first appearing at 0:26) are in Ab major. Similar to the unsettled meter, the modulations are anything but off-the-rack. “…more often than not, the key changes in Bacharach’s songs are so woven into the fabric of the song that the listener doesn’t even register that there is a shift in key,” (David Bennett Piano).