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In Reply to: RE: Just and addendum ... about digital filters discussions. posted by beppe61 on May 08, 2015 at 00:13:41
My original CD player was a 4xoversampler with a shallow analogue filter. Minimal phase shift in the audio band.
My current DAC has a choice (switchable) of 3 filters. The one I like LEAST produces a pre-ringing and just doesn't sound good.
Too much is never enough
Follow Ups:
Hi and thanks a lot for the very valuable advice.
I am not at all an expert but i think that to design a good sounding digital filter after all these years should be not that difficult.
If we agree that the processing carried-out in the digital filters is what makes or breaks the sound all other things become immediately secondary. Important of course but secondary.
Dac chip used, power supply, output stages, and so on ...
Even the Upsampling per se could be not a bad thing if this allows for the use of much better sounding analog filters.
For instance there is now a big interest for the new TOTL dac from Schiit Audio.
Even the designer puts the focus mainly on the actual dac chip used and its excellent performances.
What instead if the real secret of the dac excellent sound is in the actual filter used ?Moreover why not build dacs with the possibility to update the firmware (and so also the digital filter) like it is normally done with computer bios ?
In this way the differences introduced by different digital filtes would be extremely evident and it would be possible to update the filter when something better sounding comes available.
A good dac in this way could become a dac for life (an idea that i like very much indeed, like for cars. I do not like at all to change something still working).
I cannot understand these doubts after 30 years of digital sound.So i decided to stop buying them owning now:
1) Cambridge Audio Dacmagic and Dac 3
2) Apogee Rosetta 200 and MiniDac
3) Benchmark Dac 1 (1st edition)
4) EAD Ovation (pre processor)
5) Hegel HD11
6) Abrahamsen dac (the smaller one)
and a bunch of other chinese things with 1543, es9023 ... etc.
I will cool down a little.Still i am very optimistic.
Sooner or later there will be a cheap and good sounding dac. I am sure of this. Completely.
Thanks a lot again.
Kind regards,
bg
Edits: 05/08/15 05/08/15 05/08/15
It ISN'T easy to design and impliment a 'good sounding' digitial filter. Each type has a compromise/limit.
There are several types and some guy with imagination is probably working on a different one right now.
I have the DacMagic+ which has the 3-way selectivle filter.
Here's the AudioKarma thread which discusses these filters.
Too much is never enough
Hi thanks again.
I understand that digital filters have a strong impact on sound.
This is fine. I have also a CA dac (see picture) with 3 filters and they sound different one from the other.
Actually i am trying to understand if the filters used are the real issue with digital.
Another thing is quite clear to me. No traditional measurement can show if a dac sounds good or not.
The only way is to listen.
Dacs with so so measurements (even very bad) sound fantastic.
And viceversa !!!
If we agree that filters is where the sound is made or broken this is very important to me because i narrow down the problem.
Thanks again.
Kind regards,
bg
Edits: 05/08/15
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