[PD] Help with reverb design and vanilla's abstractions ([rev1~]/[rev2~]/[rev3~])
hard.off at gmail.com
Tue Mar 12 07:49:05 CET 2019
Look up Sean Costello’s (valhalla reverbs)postings on forums and his blog.
He shares lots of things, but you have to dig for it all.
On Tue, 12 Mar 2019 at 12:02, Alexandre Torres Porres <porres at gmail.com>
> thanks everyone for all the "reverberation"
> Em qui, 7 de fev de 2019 às 09:23, Dario Sanfilippo <
> sanfilippo.dario at gmail.com> escreveu:
>> as far as I understand, the idea is to have an FDN, with whatever matrix
>> you've chosen, whose impulse response is as close as possible to white
>> noise. The filters that you put inside the network can then be used to
>> model different environments.
> cool, thanks
> There is an algorithm on the website of J. O. Smith to calculate the best
>> approximation for a desired size while keeping the coprime relationship
>> between the lengths:
>> My reverb in PD is a 16th order FDN with Hadamard matrix and 1pole
>> lowpass filters to model the absorption of high frequencies
> yeah, I saw that on the facebook group, and also that you mentioned there
> it was based on a model by "Rocchesso".
>> I found these good reads:
>> Rocchesso, D. 1997. “Maximally diffusive yet efficient feedback delay
>> networks for artificial reverberation.” In Signal Processing Letters,
>> IEEE 4 (9), 252255.
>> Rocchesso, D., and J. O. Smith. 1997. “Circulant and Elliptic Feedback
>> Delay Networks for Artificial Reverberation.” I EEE Transactions on
>> Speech and Audio Processing 5 (1):51–63.
> yup, that's the source then :) I was able to find them both online!
> Now, a question. You say it uses a Hadamard matrix, but I've realized
> it's basically the same matrix as used in [rev3~], it's only flipped
> vertically (I hope you know what I mean) and I ask if it is the same matrix
> or if this difference grants it to be another matrix that goes by a
> different name?
> Tchau, obrigado
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