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Acceptable-Exit-9212 OP t1_jd6z9qb wrote

I tried many different audio sources etc. and the problem persists. So, the issue is tied with the DAC. Typically such EQs are implemented with IIRs. My quess is that they are using something like CM6533 . Samplerate matching control loop could cause this. (I don't think there is FT anywhere in this part of chain.)

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