It is feasible to design electronic musical instruments based on these principles. If implemented in a keyboard fashion, such instrument will require a small set of keys for a single octave or a couple of octaves only. The keys will correspond to a pre-defined instrument scale. A common 7-tone scale will suffice for most purposes, resulting in a 7-key keyboard. But even simpler 4-6 key instruments could be useful for playing basses or for less sophisticated game oriented devices. A transposition control for such instrument can be implemented in a separate key, knob, touch-pad, or similar.

Figures below provide examples of possible instruments using dynamic transposition.





Even simpler implementations can be based on two joysticks each equipped with several buttons. In this case one joystick can be used for playing the musical tones and another for dynamic transposition.