On Thu, Mar 22, 2012 at 02:05:55PM +0000, Fons Adriaensen wrote: > On Thu, Mar 22, 2012 at 09:35:48AM -0400, S. Massy wrote: > > Hello, > > > > I'm attempting to test some new IRs using jconvolver. I read the > > instruction on the config file syntax and it seems straightforward > > enough, and I am also using the hybridreverb.conf as a base template. My > > problem is that the IRs I want to test are *much* louder than the > > hybrid_reverb ones and are causing distortion when convolved. So far, I > > went by ear and adjusted the gain to about 0.01-0.03, to a point where I > > don't hear any distortion, but that got me wondering. Is there a better > > way to estimate what gain setting to use from, say, the mean and peak > > levels of the file? Is there such a thing as a preferred amplitude > > range/peak for an IR? > > The 'normal' gain for a reverb IR would be such that the direct sound, > if it were part of the IR, would have an RMS level of 1.0. On condition > that the IR was taken with a source to mic distance that produces a good > direct/reverb ratio. > > Another way to get reasonably good levels is to measure the gain > using pink noise. Measure input and output with a RMS meter such > as jkmeter. Note the difference, and adjust the gain in the config > accordingly. Thanks, that turned out to be the quickest and most effective way to do it. I unfortunately don't have an equivalent to jkmeter on the console, but ecasignalview made a reasonable enough job of giving me a hint. Cheers, S.M. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
