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Member of the Trade: Fidelizer Audio
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Which one is your preference and why? I prefer slow roll off with linear phase because I prefer having better impulse response with good coherent sound.
Which one is your preference and why? I prefer slow roll off with linear phase because I prefer having better impulse response with good coherent sound.
My choice is a proper FIR steep brickwall filter with enough taps not to have aliasing above the noise floor. Ringing you say, well yeah it rings in the transition frequency if there is energy there. That being between 20 khz and 22.05 khz for CD. Don't think I will hear it. Perhaps if I used metal dome tweeters (which I don't) and any recordings had such ringing going on at any high level (which they don't). So put me in the fast roll off school. Otherwise known as a properly designed filter.
Those dirac pulse plots are a signal that can never occur in an AD to DA system. Oh, and some of the stuff regarding squarewaves is where bandwidth limiting is confused with ringing. Bandwidth limited squarewaves are not going to be square.
Some DAPs have 5-7 digital filters to choose, some DACs have even tens of combinations. Asking something like this is considered a troll question now? It's harder to post in sound science forum nowadays, isn't it?
Ok, fine, some may have payed up for those DAPs and DACs, most don't. The existence of filter choices is simply evidence of good marketing, not good engineering. Why you'd put that choice in the user's hands is beyond me. I find it interesting that some of the best DAC designs do not have that feature.
But that doesn't address the core issue: Why bother messing around with different filters at the end of the line when filtering has already been done, possibly several times over, before you get to pick that final filter. There's no talking about linear phase. You need the one that works best at its task: reconstruction without aliasing. And that still doesn't answer the question because we don't know anything about the DAC itself and how the filter is implemented.
So I still don't understand the question. If you're asking which to choose on one of those DAPs or DACs with different filter choices, I'd say pick a DAP or DAC with the right filter already chosen.
I asked this questions because MOST DAPS in market today has those digital filter options (Fiio/iBasso/Cayin/etc.).
Why? I don't know.
I'm just curious what people would pick for scientifically.
If you may enlighten me, please show good DAPs that sell today without any digital filter option provided.
Maybe you should do something with your audio obsession. Seek help.
You made a claim that one should choose DAPs/DACs with right filter so I asked you which ones because you suggested me yourself to find the right ones.
Quoting every line I wrote like this is ridiculous.
You're way too paranoid.
Maybe you should do something with your audio obsession. Seek help.
Most DAPs in the market? Odd perspective. How about looking at the most DAPS sold in the market? And that would be none of those.
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Most DAPs in the market? Odd perspective. How about looking at the most DAPS sold in the market? And that would be none of those.
That's what you said and I looked into here.
http://www.head-fi.org/f/15/portable-source-gear
I'm pretty sure at least 50% of DAPs in that page has digital filter options in one way or another. I don't know how you came up with conclusion that most DAPs sold today don't have digital filter options.