[PlanetCCRMA] question about the freeverb algorithm

[Julius Smith]

Hi Arun,

The notation is defined in the figure caption.

I have not seen a version of freeverb that adjusts delay length as a
function of sampling rate.  Therefore, sampling rate effectively
scales room size.


On Fri, May 26, 2017 at 10:25 AM, Chandra, Arun
<arunchandra1954 at gmail.com> wrote:
>
> hi,
>
> I'm trying to implement the freeverb algorithm for my students, and I've got
> a question about the magnitude of the variables.
>
> In particular, I'm referring to the web page:
> https://ccrma.stanford.edu/~jos/pasp/Freeverb.html
>
> for each of the eight low-pass/comb filters, the variables are :
>
>         LBCF .84, .2 1557
>         LBCF .84, .2 1617
>         [etc]
>
> I'm guessing that .84 refers to the gain on the comb filters, and the 0.2
> refers to the gain on the lowpass filter, and 1557 is the length of the
> delay line.
>
> Is this correct?  and, if 1557 is the length of the delay in samples, for
> what sampling rate was this length chosen?
>
> Thanks for your help,
>
> Arun Chandra
> arunchandra1954 at gmail.com
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>
>



-- 
Julius O. Smith III <jos at ccrma.stanford.edu>
Professor of Music and, by courtesy, Electrical Engineering
CCRMA, Stanford University
http://ccrma.stanford.edu/~jos/