DAC filters

Thanks for the reply.
Yes, but not really talking about signal volume amplitude but rather amplification of the effect it imparts on the sound.

It doesn’t make sense to have 5 filter settings that 99% of the human population can’t detect.

OP you're either going to add, or subtract, amplification of the effect (frequency), from 0 ZERO. If you have the ability, to change the slope from 6 to 48 db, that will surely change the notch width, from VERY wide, to very narrow.

If you have 5 bands you can't hear the difference in, I'd question, what it's there for to begin with, and the quality to boot.

I'd also make sure my hearing was good. Does everyone hear the same thing, no change, with the 5 bands?

Regards

@recluse "amplification" of the "effect" of the analog filter choice is no longer the analog filter choice, but rather intentionally introducing distortion.

Which designers (and sound engineers) do, but not by trying to mimic the effect of a filter but rather by just designing the product to have distortion that is audible and pleasing (in the opinion of the designer or target customer).

As for the audibility of different filters, that's a different discussion, but there are definitely measurable impacts on the frequency response which fall within the amount of audible detection when using a filter at 44.1kHz or 48kHz sample rates, and in my experience also measurable and audible impacts on the phase response. If you know what to listen for.

Just because many people don't hear differences doesn't mean those differences aren't audible. It also doesn't mean those people couldn't hear those differences without additional education or training. You may be unaware of it, but there are both professional and consumer markets that makes experimentation into these things and implementing different features worth doing.

For consumers who don't care, they can pick whichever less expensive product is easy to use where the designer has simply followed a reference implementation and uses a traditional brick-wall linear filter. Possibly making choices based on differences in distortion. And this question doesn't even come up.