Hero Worship was Hal Crook's fifth album as a leader, and the second album he released for RAM Records.

This album was Crook's first recording using the 5-voice digital harmonizer, which connected to a microphone attached to his trombone's bell.

The harmonizer generate up to 5 additional "voices" at preset intervals, which allowed Crook to play chordal lines using an otherwise multiphonic instrument.

The early-generation harmonizer did not distinguish between major and minor intervals, which created a distinctive effect.