Within these individual differences, some people are drawn to rhythm, others to melody, and others to lyrics. Some people know every nuance of a drum part but not the subtle filigrees and ornaments of a melody. My wife Heather can identify a song from the first few notes of the melody, or the chord progression, but has difficulty recalling the lyrics. Many performing musicians can play thousands of songs from memory, but need to have the lyrics in front of them on an iPad—even when they wrote the lyrics themselves.

