Jul 1 2021, Fons Adriaensen has written: ... Oh, of course. I meant with bands possibly being quite narrow or adjustable in width. What do you want I'd like to use them to process sounds in the mixing stage. Pass a bass or other sound through it. Think of modular/semi-modular filterbanks like the Moog System-55 one. Does that make sense? Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c I used to think I had the answers to everything But now I know ... :) <3 (Britney Spears)

Jul 1 2021, robertlazarski has written: ... Wow! Can I spend my holidays at yours? :) It's a lovely beast and two filters with different routing possibilities are adequate for many vowel sounds. ... I am perfectly aware of the intricacies of formant synthesis and creation from a synthesis and physiological perspective and have even created a simple morphoing formant filter in Csound. It is a fascinating field. But in this instant I was looking for a simple solution that would run immediately in my DAW, so as to minimise the breakage of flow. And I'm not really looking for a formant effect. Temporarily, I have found an acceptable sound alike using a phaser without modulation, being a not entirely dissimilar mechanism. ... Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c I used to think I had the answers to everything But now I know ... :) <3 (Britney Spears)

On Thu, Jul 01, 2021 at 02:08:45PM +0200, David Kastrup wrote: A conjugate complex pole pair is indeed almost a definition of 'resonance'. Which also corresponds to a second order linear differential equation with a negative discriminant. Such resonances occur easily in physical systems, all you need is a restoring force proportional to displacement, Then Newton's law F = m * a results in an acceleration proportional to minus displacement. Acceleration is the second derivative of displacement, so the result must be a function which has a second derivative proportional to minus the function itsef. The second derivative of sin (w * t) is - w^2 * sin (w * t), so that fits the bill. Not just then, for any transient input. The impulse response is an exponentially decaying sine wave. For a formant filter such resonances are the obvious choice, but as a filter bank meant to separate a signal into almost non overlapping bands they are not very useful. To get e.g. the IEC class I octave or 1/3 octave bands you need at least 6th order. Ciao, -- FA

Jul 1 2021, Christopher Arndt has written: ... Thanks, that might work. Even if it doesn't fulfill my current idea it sounds interesting and compelling. :) Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c All I need is time A moment that is mine While I'm in between <3 (Britney Spears)