Guy here, who programmed the C++ implementation of Operator: It was a pleasure to build the instrument together with Robert, and I learned a ton from him.
In the 2009 upgrade I replaced the aliasing wavetables with bandlimited ones, generated using IFFT, one per octave. With 2x oversampling, it became aliasing-free as long as you didn’t use FM. When adding the IFFT, the feature of drawing harmonics also became obvious.
Fun fact: The four oscillators were calculated in parallel using SSE intrinsics. It’s the only time I’ve ever been able to improve the performance of something using that particular technology.
For me personally, Operator is a pinnacle of my engineering career - It is one of the most-used synthesizers in the world, though of course, there are much better ones out there.
In the 2009 upgrade I replaced the aliasing wavetables with bandlimited ones, generated using IFFT, one per octave. With 2x oversampling, it became aliasing-free as long as you didn’t use FM. When adding the IFFT, the feature of drawing harmonics also became obvious.
Fun fact: The four oscillators were calculated in parallel using SSE intrinsics. It’s the only time I’ve ever been able to improve the performance of something using that particular technology.
For me personally, Operator is a pinnacle of my engineering career - It is one of the most-used synthesizers in the world, though of course, there are much better ones out there.