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I was involved in the design. It created asymmetrical sine wave output from the LPF side chain and mixed it with the pure passthrough signal. There wasn’t significant, nor “uncontrolled” odd harmonics.


I’ve got one here. I’d be happy to run some demo test material for you and provide the results.


PS. I see other chatter on this forum. We used 1537 chips in the side chain to generate the even order harmonics.


It was all very proprietary at the time so we potted the side chain but I can have a look for some schematics if that is useful for anyone.


I think I even have a spare side chain module.


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