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Forums » Products » Impulse Modeler and Deconvolver » St Nicolaes Church preset error

Creator: riderelli

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Date: Oct 29, 2007, 3:44pm

Hi Aleksey!

just yesterday, I found a very strange behaviour in "St Nicolaes Church" IM preset.

If you generate that impulse response and open it into an audio editor, you will discover a harmonically rich pitch (fundamental at 400 Hz) standing quite loud after the original "shot". You can preview it on this image:

http://www.capitoliscompagni.it/documents/St_Nicolaes_Church_wave_impulse.gif

Is it maybe a denormalising or ringing error?

Thank you in advance for your help!

Cheers,

andrea riderelli

Creator: Aleksey Vaneev

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Date: Oct 29, 2007, 6:07pm

This is not a problem that much. If you change the recepting walls a bit this will go away. This is caused by some resonance that builds up in this design. I can't tell what's it is about exactly, but changing recepting walls helps.

Creator: riderelli

Quote

Date: Oct 29, 2007, 6:27pm

Thank you Aleksey, I'll try this night and I'll let you know the result.

Thank you again,

andrea

Creator: riderelli

Quote

Date: Oct 29, 2007, 7:34pm

Aleksey Vaneev: This is not a problem that much. If you change the recepting walls a bit this will go away. This is caused by some resonance that builds up in this design. I can't tell what's it is about exactly, but changing recepting walls helps.

Ok, I resolved as you suggested.

I have simply reduced the recepting walls dimensions (probably too much large and opposing each other). No more spurious reflections.

Thank you a lot for help!

Cheers,

andrea

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