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Re: Hiraga on Feedback

There is a paper in the AES preprint 'INTERMODULATION DISTORTION IN TAPE RECORDING' Robert Z Langevin, Ampex Oct . 1962. This paper shows that the IM generated by the same non-linearity as that that produces either 2'nd or 3'rd harmonic distortion will still be coincident to the music being played. Basically, if the order of harmonic distortion is low, the IM products will generally be OK in the musical selection. It would seem to me that higher order IM products would be just as bad as higher order harmonic products, but even more obvious in many cases.


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