No latency(no pre ringing)-linear phase eq?
- KVRian
- 965 posts since 12 May, 2019
May I ask why you'd want this? I can understand no latency but the main advantage of linear phase EQ that I'm aware is the ability to use pass filters without phase shift. For bell filters, you're just trading post ringing for preringing with the more narrow and greater magnitude producing more ringing. Every filter will ring one way or another, as far as I know based on the concept of minimum phase.Rockis wrote: Fri Feb 16, 2024 8:12 pm I don't know if this is possible technically
But i hope meldaproduction make no latency-no pre ringing-linear phase eq.....
I believe melda can do this(?)
-
MirkoVanHauten MirkoVanHauten https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=376111
- KVRist
- 456 posts since 12 Mar, 2016
No. The laws of physics too apply in the meldaverse.
-
- KVRer
- Topic Starter
- 15 posts since 25 Jan, 2024
It is just my wish or request.. i dont know deep technical side of eq.Hexspa wrote: Fri Feb 16, 2024 8:24 pm
May I ask why you'd want this? I can understand no latency but the main advantage of linear phase EQ that I'm aware is the ability to use pass filters without phase shift. For bell filters, you're just trading post ringing for preringing with the more narrow and greater magnitude producing more ringing. Every filter will ring one way or another, as far as I know based on the concept of minimum phase.
I just think no pre and post ringing would sound more clean. And if it is possible, it would be kind of innovation. But even if melda team succeed in removing only the latency in linear phase eq, it would be still amazing.
-
- KVRian
- 1281 posts since 3 Jan, 2020
You can get linear phase when you run the audio twice through your analog EQ - backward and forward. That way, the phase shift is cancelled while the EQing is doubled. That doesn't work for real-time obviously. There's a Dan Worrall video out there, where he explains it, I think.
If someone found a way to filter a signal without phase shift or latency, it would be a pretty big discovery. I don't want to call anything impossible, but with our current mathematical tools, it pretty much looks like it is.
If someone found a way to filter a signal without phase shift or latency, it would be a pretty big discovery. I don't want to call anything impossible, but with our current mathematical tools, it pretty much looks like it is.
- KVRian
- 965 posts since 12 May, 2019
Afaik you're thinking of "minimum phase" where a boost can be reversed though an identically-opposite cut but then you're left with unity gain and zero change. I'll be happy to watch the video though if you can find the link.Held wrote: Sat Feb 17, 2024 8:14 am You can get linear phase when you run the audio twice through your analog EQ - backward and forward. That way, the phase shift is cancelled while the EQing is doubled. That doesn't work for real-time obviously. There's a Dan Worrall video out there, where he explains it, I think.
If someone found a way to filter a signal without phase shift or latency, it would be a pretty big discovery. I don't want to call anything impossible, but with our current mathematical tools, it pretty much looks like it is.
"Every filter must ring" is a quote from some audio guru but I forget who. I can guarantee that all current filters ring, like Held said, and barring a huge breakthrough in math, that will be the case for the foreseeable future.
-
MeldaProduction MeldaProduction https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=176122
- KVRAF
- 14325 posts since 15 Mar, 2008 from Czech republic
Yep, very true
-
MeldaProduction MeldaProduction https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=176122
- KVRAF
- 14325 posts since 15 Mar, 2008 from Czech republic
For the record, so you can understand - imagine just a single impulse, it contains all frequencies. So you want an EQ, that would make say a low-pass, don't add any pre-ringing and be linear-phase. So it can either do nothing with the impulse, that way you'd just have an impulse again, with all the frequencies. OR it can alter the signal behind it and there you have minimum phase
. So what you want is a minimum phase EQ 
