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.
https://valhalladsp.com/blog/ On Tue, 12 Mar 2019 at 12:02, Alexandre Torres Porres <[email protected]> wrote: > thanks everyone for all the "reverberation" > > > Em qui, 7 de fev de 2019 às 09:23, Dario Sanfilippo < > [email protected]> 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: >> https://ccrma.stanford.edu/~jos/pasp/Prime_Power_Delay_Line_Lengths.html. >> > > awesome > > >> 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? > > >> Ciao, >> Dario >> > > Tchau, obrigado > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list >
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