solderdude
Grand Contributor
Sorry, I did not get your point. Claim was the pre and post ringing created by sharp filters would be audible in the form of extra bass. I suggested to record the signal with sharp filter and slow filter and see if there is any difference in bass. I am not sure I follow how differences above Nyquist would be relevant for this claim.
I'm not saying that a filter boosts the bass, the difference lies in the attack of bass or kick drums.
It won't affect the bass nor the attack of the bass which is well below 1/4 Nyquist anyway. Just stating that you cannot simulate the flawed response (only below 1/2 Nyquist) of a slow filter as that also could affect above half Nyquist which could (with some devices) perhaps alias with something or create IM products that could become audible.
When you simulate the slow filter on a DAC with a steep filter everything above it is gone so can't 'do' anything possibly sound degrading any more.
The claim was not that the filter would be audible as extra bass but that the attack would be different.
Clearly Hasan Aydin never looked at the spectrum of said instruments.
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