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Just and addendum ... about digital filters discussions.

Hi and thanks a lot for the very valuable advice so far.

So i understand that digital has actually improved thorugh the years.
Because i got this feeling that the technology has evolved until the '90 and then it has gone backwards.

However i would like to add a personal experience.
Very unsatisfied with my system playing cds with a Rotel 970bx a friend of mine put his turntable in my system.
Much much better. Absolutely bearable.
So for me the problem is indeed digital.
And we were listening through a phono stage with op-amps ... so it is not the output stage.

On this basis i am pretty convinced that is the processing going on inside a dac that makes the difference ... it could be a filter issue.
For instance ... old and new Theta dacs, to name ones, are extremely praised.
Could it be that the real secret of their excellent sound is in the filters ?
I see people talking much more of multibit, output stage, power supplies.
Digital filters are not very popular in the discussions.
Maybe because it is an unknown territory ? Maybe the secret is there ?
Maybe even a cheap delta-signa, with a op-amp output stage but a very well designed and built digital filter could sound tremendous ?
I do not know.
And i am still waiting for a clear verdict.

Moreover if i understand well upsampling to dsd can allow for the use of much more "musical" analog filters.
Do the dacs that does this sound better ?
Why this approach is not more popular ?

Thanks a lot again for the very kind and helpful advice.
Kind regards,
bg

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