Emulates a one row melodeon or a one and a half row organetto. There
is a choice of midi instruments and keys.

* Keys: Eb, Bb, F, C, G, D, A
* Instruments: Standard midi set, defaults to accordion
* Choice of one row melodeon layout and one and a half row organetto layout
* Choice of fascia images

Uses Sonivox midi synthesizer for midi audio output.
