Guitar & Cello
(The photo was made in Venice, California, in 1974)
Voices and range of guitar and cello are similar. This developed from piano; an “imputed” melody was expressed in the cello voice. Replacing piano with guitar allowed the cello more prominence.
Piano & Cello Version
(Photo c. 2010, Fort Bragg, California)
With a second section in response to C Minor Progression-II.
(The photo was made in San Diego, California, c. 1992)
Below, is the next iteration, a trio, adding a bass trombone voice to both polyphonic and harmonic rhythm in the piano/cello duet.