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Old 11-11-2019, 01:30 PM   #1
Birdy
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Default What's the secret of ReaDelay's filters? Why do they sound so good?

I really like the filters built into ReaDelay.
I find myself using it a lot of time just as a filter plugin (no actual delay or feedback).
Does anyone know what kind of slope do they have?
Does it change depending on the frequency or something?
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Old 11-12-2019, 03:03 AM   #2
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Originally Posted by Birdy View Post
I really like the filters built into ReaDelay.
I find myself using it a lot of time just as a filter plugin (no actual delay or feedback).
Does anyone know what kind of slope do they have?
Does it change depending on the frequency or something?
I agree. They are nice filters but it's a shame they're not in the feedback path.

As for your questions... I'm afraid I don't know.
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Old 11-12-2019, 03:06 AM   #3
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They're probably just very simple biquads. Slope is 12 dB/oct I'd say, but it also has a little bit of resonance.

Last edited by EvilDragon; 11-12-2019 at 03:15 AM.
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Old 11-12-2019, 03:24 AM   #4
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Originally Posted by EvilDragon View Post
They're probably just very simple biquads. Slope is 12 dB/oct I'd say, but it also has a little bit of resonance.
It's the same filters as in ReaEQ, it's possible to almost get them to null between each other. (The ReaDelay implementation seems to adjust the bandwidth/resonance slightly as a function of frequency.)
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Old 11-12-2019, 03:30 AM   #5
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Yep, figured as much.
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Old 11-13-2019, 12:51 PM   #6
Birdy
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Quote:
Originally Posted by Andywanders View Post
I agree. They are nice filters but it's a shame they're not in the feedback path.

As for your questions... I'm afraid I don't know.
I thought they were in the feedback loop?

Quote:
Originally Posted by Xenakios View Post
It's the same filters as in ReaEQ, it's possible to almost get them to null between each other. (The ReaDelay implementation seems to adjust the bandwidth/resonance slightly as a function of frequency.)
I tried that a few years ago and I remember it wasn't consistent so that's why I assumes the resonance changes.
But I tried it again now and I can 100% confirm.

At 13Khz, it trasnaltes to Q of 0.884 on ReaEQ, and at 9Khz it translates to 1.038.

So I guess it is a 6db/oct slope and not 12.
And yes it nulls 100%, even though reaper will round up to only 2 digits after the decimal point, it's only visual and the value you type in stays exact.

So I guess I'm gonna keep use ReaDelay as a filter because it the Q change cant be replicated elsewhere!
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Old 11-13-2019, 12:55 PM   #7
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You don't get resonance on 6 dB slopes with most filters. So it's a 12 dB slope.

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So I guess I'm gonna keep use ReaDelay as a filter because it the Q change cant be replicated elsewhere!
Sure can, with parameter linking.
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Old 11-13-2019, 12:58 PM   #8
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You don't get resonance on 6 dB slopes with most filters. So it's a 12 dB slope.



Sure can, with parameter linking.
Well, you CAN, but why? That's more work than just using ReaDelay!
And I thought the filters on ReaEQ are 6db/oct?

EDIT:
Just tested that too, they are infact 12db/oct (or close to that!)
I've been living a lie all those years...

Last edited by Birdy; 11-13-2019 at 01:03 PM.
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