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Too long of RT's
PostPosted: Fri Mar 24, 2006 4:14 pm Reply with quote
montesound
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Joined: 05 Sep 2005
Posts: 11




I have an IR which Easera is calculating to have Octave T30's of 8 - 9 seconds below 1K.

http://img112.imageshack.us/img112/8421/amoseasera00010oz.jpg

A user of your beta software only calculates T30's at less than 1 second.

http://img113.imageshack.us/img113/288/snap12sf.jpg

I am using version 1.0.60. What is happening?

The IR is located here:

http://users.ucom.net/~montesound/ArthurLS.wav

Regards,

Amos
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PostPosted: Sat Mar 25, 2006 7:49 am Reply with quote
Peter Patrick
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Joined: 26 Apr 2005
Posts: 33
Location: Toowoomba - AUSTRALIA




Amos,
You will peobably find that all is well if you truncate the IR.
Click on the dual blue down arrow symbol in the top trask bar.
Left Mouse button at the left hand side of the IR just to the left of the first arrival.
Then right mouse click some time after the decay has finished but before a long boring record of noise takes place.
Then click on the "Copy" button in the top task bar.

Your T30 rendering is being confused by the looong tail.

Hope this helps.

_________________
Peter J. Patrick
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PostPosted: Sat Mar 25, 2006 3:17 pm Reply with quote
Stefan
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Joined: 19 Apr 2005
Posts: 167
Location: Berlin, Germany




Hi,

Peter is right, the new Beta of 1.1 (release coming soon!) only does a better job in determining and removing the noise floor from the Schroeder backward integral. However, in some cases there is still no way around manual editing, when the noise is to strong and overlays the decay.

If you do measurements with high S/N already the current RT calculation should deliver good results. Note, that you can always switch off the noise compensation to see how the pure backward integral looks like without any treatment.

Stefan
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PostPosted: Sat Mar 25, 2006 6:50 pm Reply with quote
montesound
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Joined: 05 Sep 2005
Posts: 11




Thanks to Peter and Stefan,

That does help my calulations. I will also try to get better S/N with my sound card gain settings as it doesn't seem that I am getting the best performance out of it.

Thank you so much,

Amos
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