[LAU] correct jconvolver matrix gain for convolution reverb?

Fons Adriaensen fons at linuxaudio.org
Thu Jan 31 12:40:32 UTC 2013

On Thu, Jan 31, 2013 at 02:02:26AM +0100, Jörn Nettingsmeier wrote:
> i would like to start with the "correct" reverb level and go from there.
> the initial (peak) normalisation was done in ardour. maybe i should
> have normalized the initial impulse area to unit energy rather than
> the highest peak to unit amplitude, but i'm not quite sure how to
> accomplish that. the normalization feature in aliki doesn't seem to
> do anything, or i'm misunderstanding something.

Not normalise, select the W channel only, zoom in on the direct sound
and put a marker on it. The other marker should be off. Shift-L-click
on the Gain/Norm button. The will normalise the energy in a short region
around the marker. 

Now since is this W, the level should actually be 3 dB lower. So set the
gain to 0.71 * the displayed value, and L-click on Gain/Norm. Then remove 
the direct sound etc.



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