Harmony Director / 1984
[ Image ] HD-81

The first model of the multi-instrument Harmony Director for instructing ensembles and brass bands.
Equipped with functions for changing tuning and transposition, switching tuning systems between temperament and just intonation, harmony training, tempo, and rhythm training.
The Harmony Director is a huge boon to instructors and musicians in brass bands, orchestras, and other kinds of ensembles and choruses.