SOLVED - Importing IR changes phase (turned off cabinet import processing)

[ApocalypticKatana]

Edit 9/16 SOLVED

see post #11 - https://forum.fractalaudio.com/thre...cabinet-import-processing.215379/post-2706163

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For context it's an IR for room correction (phase + amp can't be changed for proper correction)

I imported in Ultra Res

I double checked in Room EQ Wizard the amp+phase after importing into the AX3 and checked it with the original and the Left side's phase is correct +/- 1 degree but the right side IR file completely changes phase!

any idea what I can do?

attached are the phase diagrams before and after importing into AX3

Don't mind the amplitude difference as I've no problem correcting for relative L/R db values compared to original.

 

[mr_fender]

If you imported it from a wav file, check your import settings in Axe Edit. Try turning off zero phase there.

 

[ApocalypticKatana]

If you imported it from a wav file, check your import settings in Axe Edit. Try turning off zero phase there.

I made sure per thread title to turn off IR Processing under Preferences>Cabinet Import>IR Processing=None

IR Output=Ultra Res

The left side IR imported properly +/-1 deg phase compared to the original in REW

I've no idea why this right side IR isn't importing properly without changing any changing settings in the creation and importing of the IR

 

[FractalAudio]

Ultra-Res is always minimum phase. Don't use Ultra-Res.

 

[ApocalypticKatana]

I see, than even in axe edit with IR processing set to None by choosing Ultra Res it still applies MPT if I understand correctly.

if that's the case I find it odd how it didn't change the phase for the Left side import as Ultra Res

 

[ApocalypticKatana]

Unfortunately the same problem still arises even with importing the Right side IR using Normal Res.

While importing using Normal Res changes the IR phase on the left side IR a bit after import its's acceptable for use

But the Right side IR is completely out of phase form the original.

see pictures from REW

 

[ApocalypticKatana]

Report

Importing my "left" and "right" room correction 40ms wav files still changes the phase importing to Normal Res

Using CabLab4 doesn't help either

 

[FractalAudio]

Report

Importing my "left" and "right" room correction 40ms wav files still changes the phase importing to Normal Res

Using CabLab4 doesn't help either

Looks fine to me. You're looking at absolute phase which is irrelevant. If you trim a couple samples off the beginning you'll change the absolute phase. The IR import utility automatically trims any leading silence. Also, the program you're using to plot the phase isn't unwrapping the phase.

 

[ApocalypticKatana]

Looks fine to me. You're looking at absolute phase which is irrelevant. If you trim a couple samples off the beginning you'll change the absolute phase. The IR import utility automatically trims any leading silence. Also, the program you're using to plot the phase isn't unwrapping the phase.

I’ve been meticulous to align the single sample impulse to align from my tests from DAW to AX3 to DAW (with IR Player off then on) to get the resulting normal res output.

Other than doing this I’m not sure what else I can do to make this work as it sounds off with the AX3 compared to using the IR on a computer.

I realize there’s a lot of variables to account for but I’ll look into unwrapping the phase in REW and trying to align things somehow.

Thank you for your time @FractalAudio

 

[ApocalypticKatana]

I had chatgpt analyze the before and after files and here's the result



And yes unwrapping the phase shows the graph matching in shape now (before offsetting)

Thank you again @FractalAudio

 

[ApocalypticKatana]

EDIT 9/16, 11:39 (gmt-4)

After offsetting/aligning in the DAW and windowing properly in REW.

I realized one of my IR's was inverted after importing in Ultra-Res so I just used the filter block to phase invert the IR.

After that there was no phase difference!

see pictures!