From Bob's Linkedin page:
"DSP design work for the Prophet 12, Pro 2, Prophet 6, OB 6, Feedback Module, Prophet Rev 2, Prophet X, Pro 3, and Prophet 5. Designed and implemented all anti-aliased subtractive, additive, and noise based waveforms for the P12, Pro2, Prophet X, and Pro 3. Designed all effects in the Prophet 6 and forward."