Recording Impulse Responses for Speaker Virtualization

[morgin]

I've converted my Hesuvi file to "normal" channel config and renamed it for ease to the same name as yours "210110-S5-M21-FC3-T500(L-R-C-LFE-LS-RS-LB-RB).wav". I then put both the wave and your filters .txt file into C:\Program Files\EqualizerAPO\config\conVT. When I deactivate everything in Hesuvi I only get the surround channels and changing the setting in EQapo doesn't make any difference. Is there something I'm missing?

 

[Xam198]

@ reter
It's typically the sound of a componant malfunctionning, not a buzzz, neither a ground loop but sort of "vvvvvum" , lower in frequency than a buzz. I've seen it in the level indicator of the zoom H5 : without any sound, the level of right channel was very very slightly moving, i recorded it with audacity and had confirmation. I tried both mic on the vxlr, swtiched the vxlr on the H5, the humm was following the vxlr+. I increased the input level of the H5 to max, perfectly clear sound on one input, "hummm" on the other. Back to the sender for a new one.

 

[musicreo]

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I've converted my Hesuvi file to "normal" channel config and renamed it for ease to the same name as yours "210110-S5-M21-FC3-T500(L-R-C-LFE-LS-RS-LB-RB).wav". I then put both the wave and your filters .txt file into C:\Program Files\EqualizerAPO\config\conVT. When I deactivate everything in Hesuvi I only get the surround channels and changing the setting in EQapo doesn't make any difference. Is there something I'm missing?

Where you put your files is not important as long as in the txt file the path and the name for the wav file used for the convolution is correct.
You should just include the txt file in the EQ APO configuration editor like in my screenshot. If you want you can upload your hesuvi wav file and your converted one. Then I can take a look if everything is ok.

 

[morgin]

Thanks I really appreciate it. Here's the link to my converted and original Hrir

https://mega.nz/folder/AEtEwCQS#pyaRjbTBDNDGXEiWUvWS5g

 

[musicreo]

Thanks I really appreciate it. Here's the link to my converted and original Hrir

https://mega.nz/folder/AEtEwCQS#pyaRjbTBDNDGXEiWUvWS5g

The files are ok and work. Is there some filter active before in the EQ APO configuration editor that may make problems? You have deactivated HESUVI in the configuration editor?

One other thing I notice is that your files go up to 0db and you risk clipping.

 

[morgin]

The files are ok and work. Is there some filter active before in the EQ APO configuration editor that may make problems? You have deactivated HESUVI in the configuration editor?

One other thing I notice is that your files go up to 0db and you risk clipping.

Yeh I deactivated everything in hesuvi from the menu. There’s no filters. The volume was louder because I think jakko mentioned surround sound need the volume

 

[musicreo]

Yeh I deactivated everything in hesuvi from the menu.

Does that mean you switched it off in the EQ-APO editor or is it still active there and included before the txt file?

 

[morgin]

Does that mean you switched it off in the EQ-APO editor or is it still active there and included before the txt file?

I deleted the original text config file to check if that made a difference and used the new txt file only with EQ-APO but it didn’t work.

I may need to delete everything and reinstall. I have to do that sometimes when the audio isn’t quite right but this time I’ll just use the new .txt file and the changed .wav. Without installing hesuvi.

Just to say you are a big help to me and helped me loads and I really appreciate you. Thanx

 

[reter]

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Where you put your files is not important as long as in the txt file the path and the name for the wav file used for the convolution is correct.
You should just include the txt file in the EQ APO configuration editor like in my screenshot. If you want you can upload your hesuvi wav file and your converted one. Then I can take a look if everything is ok.

My curve is totally red, does this affect the overall audio?

To fix, should i record my brir trying to mantaining the gain not over 0?

 

[morgin]

My curve is totally red, does this affect the overall audio?

To fix, should i record my brir trying to mantaining the gain not over 0?

I’m sure it means the audio is clipping and it looks like it is clipping on all the frequencies on your end. Ideally there shouldn’t be any red

 

[Xam198]

Still have warning FT measurement has lower delay to left ear than to right, 0,29ms, after switching mics, i don't understand, any idea ? Could it be my souncard, EMU 1820, old one (ten years i think) but good sound ?
I found the mics EM258 a bit noisy, is it the same for those of you who have them ?

 

[reter]

I’m sure it means the audio is clipping and it looks like it is clipping on all the frequencies on your end. Ideally there shouldn’t be any red

yea but i used hesuvi in two systems and boh have this problem, a lot of users have the same red graph so when i saw @musicreo graph that's almost perfect i thought he would be the choosed one to ask how to fix this damn problem i have sinnce almost two years

@Xam198 have you tried switching both mics and vxlr? i'm not expert, but i would test with another audio interface just to be sure

 

[musicreo]

Still have warning FT measurement has lower delay to left ear than to right, 0,29ms, after switching mics, i don't understand, any idea ? Could it be my souncard, EMU 1820, old one (ten years i think) but good sound ?

I guess there is some noise that is detected as signal before the sweep starts and that causes the warning.

I found the mics EM258 a bit noisy, is it the same for those of you who have them ?

I had a few capsules with lot of noise and some that were very good but it is possible that this was to my soldering.

 

[musicreo]

yea but i used hesuvi in two systems and boh have this problem, a lot of users have the same red graph so when i saw @musicreo graph that's almost perfect i thought he would be the choosed one to ask how to fix this damn problem i have sinnce almost two years

The graph is the sum of all channels in the convolution. So if all channels are close to 0db (that is very rare) you would have up to 18.4db clipping. If you just play stereo it is much less. Usually you want to have some headroom to avoid any clipping. One simple way would be to set a negative preamplification value before the convolution but then your soundcard must have enough power to drive your headphone even with larger negative preamplification.

Another problem would be if your impulse response filters are already clipped.

 

[reter]

The graph is the sum of all channels in the convolution. So if all channels are close to 0db (that is very rare) you would have up to 18.4db clipping. If you just play stereo it is much less. Usually you want to have some headroom to avoid any clipping. One simple way would be to set a negative preamplification value before the convolution but then your soundcard must have enough power to drive your headphone even with larger negative preamplification.

Another problem would be if your impulse response filters are already clipped.

I'm trying to do the negative preamp as you suggested, lucky that my jds can drive easily my 660s, but i'm not satisfied with just doing the preamplification in eqAPO, i would prefer recording a good graph and i noticed that you don't actually have a negative preamp, you only have a 8.5db on low frequency which is great, how you achieved that?