Elka Rhapsody 610 Vintage Italian Analog String Machine Synthesizer Keyboard | eBay
The 'Clavioline' M. Constant Martin, France, 1947 – 120 Years of Electronic Music
MATRIXSYNTH: Elka Rhapsody 490 String Machine SN 2612
1975 Elka Rhapsody 610 quick demo - YouTube
Elka Rhapsody pedal: how it works? $5 at pawn shop, want use to with lap steel. ~7 Ohm Light bulb and prob a light sensor to change volume. 12 VDC not enough