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The art of Virtual Analog filter design [pdf] (native-instruments.com)
103 points by unsatchmo 5 months ago | hide | past | web | favorite | 10 comments



This is great stuff. I've also done some work in the space, and did a writeup called "A matrix approach to the Moog ladder filter", which is a pretty different perspective from Vadim's, but the concepts and principles are pretty much the same under the hood. That's the filter in music-synthesizer-for-android, and I think it holds its own, both in audio quality and (SIMD-optimized) CPU efficiency.

[1] PDF: https://pdfs.semanticscholar.org/8fba/b35e5235fa2f6006c0f889...

[2] Discussion on KVR Audio: https://www.kvraudio.com/forum/viewtopic.php?f=33&t=385262


Was this written under the auspices of Native Instruments? If so, I’m extremely impressed - they’re doing some very cool work over there.


Really really useful - good to see NI making this level of detail open and easy to access.


I think you might want to disambiguate a bit. When people say NI, they are almost always referring to National Instruments, not Native Instruments. Especially considering that both deal in virtual filter implementations.


In audio circles, NI has always been Native first. If I search for "NI Native" in google there is not a single mention of National Instruments in the first page.


Sure in music circles, but National is pretty big in DSP circles and if I just search NI in google, National Instruments is the first 5 results followed by a news story followed by Native Instruments. If you go to NI.com, that's National Instrument's website. If I search for NI DSP, NI analog, or NI filters all return National Instruments top billing.

I think it's reasonable that someone might get confused especially since the PDF (About DSP implementations of Analog Filters) doesn't mention Native.


Can vouch. If talking in music scenes, NI is Native Instruments.


Always been native instruments in my area. especially simple when commenting on a link from the native instruments website


NI is Native Instruments, has been that way since the late, late 90's in audio circles


looks great, see also Julius O. Smith's awesome DSP tutorials: https://ccrma.stanford.edu/~jos/filters/




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