Exterior View of the
Hupfeld Model A Phonoliszt-Violina

Access doors for each roll changer (of the duplex roll changer assembly) allow for easy changes of music. The left roll-changer plays only Phonoliszt-Violina rolls, while the right-side changer plays Phonoliszt rolls (piano only). During normal operation the roll-changers alternate, playing music for violins with piano accompaniment, or alternately, just piano only.

The piano keyboard can be played like any regular upright piano when the instrument is not being played automatically.