Abstract: A manually played electrical musical instrument of the electronic type in which simultaneously with selection and playing of a melody tone (note) a predetermined pattern of harmonies are also selected in such manner that at least five of the harmonies selected for the appertaining tone are mutually different. The instrument also includes generation of rhythm sound effects which permits programming of predetermined rhythm patterns defining the times of occurrence of predetermined rhythm sounds in a sequence of a predetermined number of beats, and generation of different bass tones according to a sequence of notes.