Way back when the music presets on keyboards were actually stored in the analog format, as this 1970s Antonelli keyboard goes to show. Ben sent in these shots after a successful snag from ebay. The answer to the first question is, No! It does not change the speed of the record playback when keys are pressed. But it would be easy to mod that because the keys are on a resistor bus to begin with. The record player also has a 33 to 45 rpm switch and all of the circuitry looks just right for producing terrible squeaky squarewave tones. A quick vid is located here.