1975 Elka Rhapsody 610 quick demo

video by Valmont

"A simple string machine from the mid 70s, with the usual technologies of that time: a master top-octave oscillator, and frequency dividers making each key's pitch for the 61 sound generators boards.
The voices are then summed in a double chorus: one slow delay line, and one fast - both synchronized making regular phasing cycles.
Funny thing with these octave-dividers machines is that all the notes aren't perfectly "in tune". The first models had some key-pitch variations up to 10 cents from a traditionnal tempered keyboard! The rev.2 had a better pitch division, with pitch variation up to 2 cents, witch is pretty unnoticeable for common ears.

0:02 - Strings + Piano + Clavichord
0:14 - Violoncello + Strings
0:41 - Piano + Clavichord (with phaser)
1:08 - Violoncello + Strings (with phaser)"