brendan mccloskey

https://cycling74.com/forums/cymbal-synthesis-in-gen/

And in my own gen~ learning pursuits, I am recreating the [reson~] object in gen (I'm trying to build a PeRColate-type synth). It's relatively simple, and follows the equation revealed in that object's help file.

My question is, how do I implement the familiar ringing sound of the [reson~] object? The gain coefficient ('g') in the equation does control the resonant peak, but in my version it raises the amplitude of ALL frequencies, and quickly distorts. I'll readily admit that my maths is a little weak, but my interpretation of the equation is correct, as far as I can see anyway. Here's a simple demo patch (attached).

Hallo all
in relation to this recent thread:

feedback-factor-missing-from-my-gen-resonator

https://cycling74.com/tutorials/gen-tutorial-1-the-garden-of-earthly-delays/

'damp' function in your feedback path? feed the filtered sound back?

i've found the best results using multiple stages of feedback and 'compression'/'soft clipping' etc.

the part i've never really gotten a handle on is function(s) to map 1 interface element to keep everything internally scaled in working/out of exploding range. (so maybe this isn't the way to go about it... ) oth, you can get some nice sounds that way - the most interesting sounds to me are usually 1 step under exploding - have to really stretch out those flonum boxes. :)

i've found the best results using multiple stages of feedback and 'compression'/'soft clipping' etc. 

the part i've never really gotten a handle on is function(s) to map 1 interface element to keep everything internally scaled in working/out of exploding range. (so maybe this isn't the way to go about it... ) oth, you can get some nice sounds that way - the most interesting sounds to me are usually 1 step under exploding - have to really stretch out those flonum boxes. :)


well it's not so helpful, but this is pd reson~ port if that helps brendan

both suggestions are valuable, for different reasons. If I get time to walk myself through Gregory's tutorial, it might reveal a solution.

@achzo, thanks for this. Do you know what "1e-20" and "?" translate to? I should be able to decipher and realise the rest of the code myself

Subjectively, at least, with a gain coefficient of < 4.0 I can make it 'ring', but, as Jonah implies, there is obviously interdependence between the various coefficients in the resonator equation that give it its unique sound.

qinv = (q > RESON_MINQ ? -1. / q : (-1. / RESON_MINQ));

if q > RESON_MINQ then -1. / q else (-1. / RESON_MINQ)

qinv = (q > RESON_MINQ ? -1. / q : (-1. / RESON_MINQ));
so lets rewrite it to :

if  q > RESON_MINQ then  -1. / q else (-1. / RESON_MINQ)


Hi achzo
that's very clear! Thanks a million.

feedback factor missing from my gen~ resonator