[Csnd] Lumped modeling and wave digital filters
| Date | 2008-09-19 15:17 |
| From | Darren Landrum |
| Subject | [Csnd] Lumped modeling and wave digital filters |
I originally sent this out on the Faust mailing list, so apologies to those of you who might also subscribe there. I've tried googling around and I've been reading through some of Dr. Julius Smith's textbook on the subject, but I was hoping someone might know of a web site or paper or two on the implementation of wave digital filters and lumped modeling. Some code examples would be really nice. I found an interesting paper (along with some sound examples) on using WDFs to model guitar amplifiers, and I was impressed with the results: http://lib.tkk.fi/Diss/2008/isbn9789512292431/article4.pdf Here are the sound file examples: http://www.acoustics.hut.fi/publications/papers/icassp-wdftube/ One of the questions I really should ask is whether there are any patent issues with using this knowledge in an open source project. The earliest paper I can find on WDFs dates back to 1986, so if a patent was filed at about that time, it should be expired by now, right? Thanks for the help! Regards, Darren Landrum |
| Date | 2008-09-19 15:37 |
| From | Bruno Degazio |
| Subject | [Csnd] Re: Lumped modeling and wave digital filters |
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Hi Darren You may want to check out Yamaha's patents for the VL1 and VL70 synthesizers, which employed this technology. You can find a few of them at my website: I believe Julius's site lists a lot more of them. There are also a number of research papers by Woodhouse and McIntyre which explore waveguide modelling of string instruments. These predate Julius Smith's work, I believe. I have a few of these on my site as well. Bruno ------------------------------------------------- Bruno Degazio, B.Mus, M.Mus. Academic Advisor Professor, Animation Sound Design School of Animation, Arts & Design Sheridan College, Oakville, ON 905-845-9430 x2603 On 19-Sep-08, at 10:17 AM, Darren Landrum wrote:
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