Stereo Rotation Plugin

[Debutante]

Why is there no new plugin like these guys???

https://www.kvraudio.com/product/phaseb ... abugsaudio
https://www.kvraudio.com/product/phase_ ... udiocation

or is there?

...note that both these had mono and stereo versions. LOSER also had one and it was ported, but very buggy.

[bnz]

This is how I understand it not being a filter expert: "phase rotation" is to my knowledge not a technically very precise term. There are some based on all-pass filters IIR filters and some based on FIR filters.

(no order)

FIR:
https://www.voxengo.com/product/pha979/

IIR (more common):
https://www.uaudio.com/products/little-labs-ibp
https://store.solidstatelogic.com/plug- ... ve-x-phase
https://www.waves.com/plugins/inphase
https://www.airwindows.com/phasenudge/
https://x42-plugins.com/x42/x42-phaserotate
https://www.fabfilter.com/products/pro- ... er-plug-in

To my knowledge, most (if not all) phase rotators except for PHA979 are IIR all-pass filters. The difference to my knowledge is that IIR filters don't rotate totally evenly across the frequency spectrum wheras PHA does. In exchange, PHA introduces more latency wheras all-pass filters don't. So both have upsides and downsides.

I'm pretty sure the ones you mentioned are also IIR filters. So there are plenty of options the way I see it.

[TIMT]

FIR linear phase rotation also changes the impulse of sounds which might not be desired. PhaseNudge isn't IIR how it's tradtionally implemented or FIR and it's not really a phase rotator. It's using a implementation common in reverb design called a "Schroeder Allpass" which isn't really fit for purpose in what people usually use phase rotation for(it doubles up transients)

[Puduku]

Process Audio Protility is free and does phase rotation.

https://process.audio/products/protility

[Debutante]

Process Audio Protility is free and does phase rotation.

https://process.audio/products/protility

Thanks, it does, but very limited - band limited.... and I should have titled it phase.

[Debutante]

This is how I understand it not being a filter expert: "phase rotation" is to my knowledge not a technically very precise term. There are some based on all-pass filters IIR filters and some based on FIR filters.

(no order)

FIR:
https://www.voxengo.com/product/pha979/

IIR (more common):
https://www.uaudio.com/products/little-labs-ibp
https://store.solidstatelogic.com/plug- ... ve-x-phase
https://www.waves.com/plugins/inphase
https://www.airwindows.com/phasenudge/
https://x42-plugins.com/x42/x42-phaserotate
https://www.fabfilter.com/products/pro- ... er-plug-in

To my knowledge, most (if not all) phase rotators except for PHA979 are IIR all-pass filters. The difference to my knowledge is that IIR filters don't rotate totally evenly across the frequency spectrum wheras PHA does. In exchange, PHA introduces more latency wheras all-pass filters don't. So both have upsides and downsides.

I'm pretty sure the ones you mentioned are also IIR filters. So there are plenty of options the way I see it.

Which one of these does something like this? This is the kind of rotation undertaken by the plugins I mentioned.

[bnz]

Sorry, I haven't watched the whole video, just seen he uses the RX phase module.

Looking at the manual of RX11: https://docs.izotope.com/rx11/en/phase.html

It states: "When a waveform’s phase is rotated, every frequency is rotated equally."

While they don't mention anything too technical about the RX11 phase module, this reads like a linear phase shift to me which would be that RX11 works technically closer to Voxengo PHA-979. I might be wrong though. In any case, one big difference to the RX11 phase module is that it can analyze a whole waveform and determine a rotation that weighs the waveform more towards an equal phase distribution. I don't think this is easy to do without an offline analysis with normal plugins as they have a limited lookahead.

Happy to hear other expert opinions on that. That said, I don't think the plugins you have mentioned actually do those constant phase shifts. I'm pretty sure they would mention this if they did. If you look for a cheaper offline solution than RX (whch is maybe what the question is about), you might want to check whether Acon Acoustica has a feature like this. I haven't checked.

[Puduku]

Process Audio Protility is free and does phase rotation.

https://process.audio/products/protility

Thanks, it does, but very limited - band limited.... and I should have titled it phase.

And if you want full control, there is this one, Melda MFreeformPhase, which is also free. Instead of inputing a simple phase rotation value, you draw a curve of the rotation process, the frequencies delays :
https://www.meldaproduction.com/MFreefo ... qM3uZCyraZ

[jamcat]

https://www.kvraudio.com/product/360-by ... ud/details

[bnz]

Cool, this looks like a good one. Didn't know this.

[bnz]

By the way, just looked it up, Acoustica also has something similar to RX.

2025-11-28 16_50_39-Acoustica Premium Edition.png