Was trying to get this sound the other day. Doesn’t seem too tough but I don’t feel like I’m getting it right. Anybody out there figured this one out or something in the ball park.
Sounds very reminiscent of Billy Preston’s work with the Arp Pro Soloist. Shouldn’t be too difficult to create a close approximation on a Voyager: Single oscillator into resonant low pass filter. Pro Soloist filter may have been 2 pole (12db/oct) as opposed to Voyager’s 4 pole. Add some fast vibrato with the mod wheel and VOILA!