One source of information on the topic is Technical Paper 3. HD Audio: 'Ringing' why it is undesirable and how to address it on the AMR website.
Dealer disclosure.
Dealer disclosure.
asymmetric apodizing filter
I have the esoteric K01 and it offers the standard filters and the newer filter designed to reduce preringing. They surely sound different. I would like to learn more.
Do the asymmetric or apodizing filters come with sonic tradeoffs or theoretical tradeoffs? Do they compromise phase linearities?
Thanks
Do the asymmetric or apodizing filters come with sonic tradeoffs or theoretical tradeoffs? Do they compromise phase linearities?
Thanks
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- 8 posts total
the ps audio pwd and pwd2 have both minimum phase filter and asymmetric apodizing filter along with other combos. i found them very helpful/noticeable with some recordings and not so much with others. am yet to determine any pattern or why. i'm thinking that's why ps audio gives you 4 choices along with an auto mode. some info towards the bottom of this write-up http://www.psaudio.com/products/audio/media-players/perfectwave-dac/ cheers |
Hi Glai - I recently uploaded an apodizing filter into my Meridian dac/preamp. To my ears, it is a remarkable improvement. FWIW, I did NOT upload Meridian's proprietary apodizing filter, although I had the option to do so. Instead, I uploaded an apodizing filter created by an independent programmer. My decision to install a non-official filter was based on multiple reports from Meridian owners who were less than overwhelmed by Meridian's proprietary filter. They felt that Meridian's filter removed some of the "air" in the recording. I'm just reporting something second hand, so keep that in mind. I mention this because it highlights the fact that there appears to be quite a bit of variation among apodizing filters. I think it would be interesting if a manufacturer offered multiple apodizing filters in a single product. Maybe that will happen at some point. Bryon |
We can talk about various advantages and disadvantages but it all comes down to your own ears. Some won't like different filters because it's just not what they've become conditioned to. Thirty years of "brickwalls" sets a de facto standard of sorts. Newer DAC chips, like some of the Wolframs and ESS Sabres, have multiple filter choices on board but the surrounding circuitry and implementation can make a large difference. Related topics, in a more analog context, might come from terms like "group delay" and "Bessel filters". |
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