axers fall

In this video series,I will show you how to design waves in gen~ for some LFO modulation and wavetable synthesis position control(or you can make that just a sound wave).

If you don't mind my bad English and no explainations with human voice(I only write comments),My channel sounds like a good choice for you.(and I recommend you 2x speedLOL)


Series Link : https://www.youtube.com/playlist?list=PLbr98814z14qn-7OPn55kj7GdeNrOuatO 
Please check out my youtube channel for more Max/MSP sound design tutorial!!!!!!THANKS!!! 
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In this video series,I will show you how to design waves in gen~ for some LFO modulation and wavetable synthesis position control(or you ... 

sharing-sound-design-ideas-design-waves-in-gen-series

[sharing sound design ideas] design waves in gen~ tutorial series

Please check out my YouTube channel for more Max/MSP sound design videos!!!
Like,share and subscribe : https://www.youtube.com/@axersfall369 


Please check out my YouTube channel for more Max/MSP sound design videos!!!
Like,share and subscribe : ... 

sharing-sound-design-ideas-gate-and-route-random-probabilities-in-gen

Thanks. I actually caught the end of this live yesterday!

will check out your solutions more deeply.

[sharing sound design ideas] gate and route random probabilities in gen~

HighHarmonics

Does anyone know of a way to do timestretch in gen~?

MSP has [stretch~] based on Ztx, and timestretch options in [groove~]. 

It would be useful to do these or something similar in gen~. 

Does anyone know of a way to do timestretch in gen~?
MSP has [stretch~] based on Ztx, and timestretch options in [groove~]. 

timestretch-in-gen

The timestretching algorithms in stretch~ (and groove~ -- it's the same underlying code) using the ztx library from Zynaptic (http://www.zynaptiq.com/ztx/). Because this is licensed technology, it can't be simply embedded in a code export capable context like gen~.  

Working within gen~ you would be wanting to 'roll your own' timestretch algorithms. Some of the simpler approaches include pitch-synchronous overlap add (PSOLA), which is pretty straightforward granular processing (and there's a basic example of this in the gen~ examples folder), or phase vocoder based stretching (which can be patched in a gen~ embedded within a pfft~). 

Better timestretching will take into account properties of the audio being stretched, responding separately to transients, working with fundamental & harmonics, and so on.  That would be a fun project to work on, and it certainly would be useful!

(FWIW ZTX appears to use a wavelet based approach according to their website.  It would be an interesting project to try and develop wavelet methods in gen~ but it probably isn't easy to do.)

The license restriction with Ztx makes sense, I didn't think about that. 

In the Examples, I see gen~.pitchshift and gen~.slicer that both use overlap-add. I'll dig into these. 

I would love to work on something like this, but it is probably beyond my level right now. 

timestretch in gen~ ?

Blair

I found this allpass filter in the form of matlab code. Its a special filter used to create inharmonicty in strings waveguides. I was wondering if anyone would be willing to help me port it to genexpr?

I am unsure where something like a history operator fits in, where the actual input and output signal go, 

also little things like the periods which are in some lines, I heard it might be something to do with an array? 
another confusing thing is the colons on this line, which i heard is like a counter?phik = pi*[1:2:2*nap-1];

function sos = adf(f0,B,df,beta)
% adf.m
%
% Allpass dispersion filter design  
% J.S. Abel, V. Valimaki, and J.O. Smith, "Robust, Efficient Design of
% Allpass Filters for Dispersive String Sound Synthesis," IEEE Signal
% Processing Letters, 2010.
%
% Parameters:
% f0 = fundamental frequency, Hz
% B = inharmonicity coefficent, ratio (e.g., B = 0.0001)
% df = design bandwidth, Hz 
% beta = smoothing factor (e.g., beta = 0.85)
%
% Examples:
% sos = adf(32.702,0.0002,2100,0.85);
% sos = adf(65.406,0.0001,2500,0.85);
% sos = adf(130.81,0.00015,4300,0.85);
%
% The output array sos contains the allpass filter coefficients
% as second-order sections.
% 
% Created: Vesa Valimaki, Dec. 11, 2009
% (based on Jonathan Abel's Matlab code)

%% initialization

% system variables
fs = 44100;		%% sampling rate, Hz
nbins = 2048;	%% number of frequency points

%% design dispersion filter

% period, samples; df delay, samples; integrated delay, radians
tau0 = fs/f0;   %% division needed
pd0 = tau0/sqrt(1 + B*(df/f0).^2);  %% division and sqrt needed
mu0 = pd0/(1 + B*(df/f0)^2);
phi0 = 2*pi*(df/fs)*pd0 - mu0*2*pi*df/fs;

% allpass order, biquads; desired phases, radians
nap = floor(phi0/(2*pi));
phik = pi*[1:2:2*nap-1];

% Newton single iteration
etan = [0:nap-1]/(1.2*nap) * df;  %% division needed
pdn = tau0./sqrt(1 + B*(etan/f0).^2); %% division and sqrt needed
taun = pdn./(1 + B*(etan/f0).^2);
phin = 2*pi*(etan/fs).*pdn;
theta = fs/(2*pi) * (phik - phin + (2*pi/fs)*etan.*taun) ./ (taun - mu0);
% division needed

% compute allpass pole locations
delta = diff([-theta(1) theta])/2;
cc = cos(theta * 2*pi/fs);
eta = (1 - beta.*cos(delta * 2*pi/fs))./(1 - beta);  %% division needed
alpha = sqrt(eta.^2 - 1) - eta;  % sqrt needed

% form second-order allpass sections
temp = [ones(nap,1) 2*alpha'.*cc' alpha'.^2];
sos = [fliplr(temp) temp];

I found this allpass filter in the form of matlab code. Its a special filter used to create inharmonicty in strings waveguides. 

how-do-i-convert-this-obscure-allpass-from-matlab-into-gen-code

as there's this line ->     nbins = 2048;	%% number of frequency points
it may mean it's an FFT type of treatment.
the array would mean what you need to do on each bins
maybe ?

i don't think its FFT because in the whitepaper this filter is based on they don't mention it, however someone told me that the filter is moreso based on an array vs sample by sample. so i am kind of just more confused now :')
https://www.researchgate.net/publication/224106863_Robust_Efficient_Design_of_Allpass_Filters_for_Dispersive_String_Sound_Synthesis

>An efﬁcient allpass ﬁlter design method is introduced to match the dispersion characteristics of vibrating stiff strings. The proposed method designs an allpass ﬁlter in cascaded biquad form directly from the target group delay, placing the poles at frequencies at which the group delay area function achieves odd integer multiples of π

So this is essentially an array of allpass filters, and the paper describes a method of spreading out their phases and frequencies, if I'm reading it right.

So we're basically looking at a resonator/reverb with a TON of allpasses. using "odd integer multiples of Pi" is a common method of avoiding unwanted resonances building up from harmonics inside reverbs/diffusion.

First time I heard software using this sort of process creatively has to be the GRM tools  and Soundhack? 

For getting into this, have a sniff in the help examples: Examples->Gen -> gen~.karplus_strong_strange 

I think you'll find interesting shades of that paper inside that gen~ file in this patch. 

soundhack was fft only and if i am not mistaken the grm plug was more like reson~ than a "normal" feedback loop.

i find the idea very interesting to use the same feedback loop (think tapin~) for loops of different sizes at a time - no matter if with allpasses, the teeth object, or with yet another tapping buffer inside the feedbackloop. less objects, less connections, less CPU. and be prepared for some suprising results.


got this far with the help of a tutor, but he couldn't figure it out in the end. we are 90% there but its not working yet. maybe one of you guys want to take a peak? :))


How do I convert this obscure allpass from matlab into gen code

I'm getting this error with my gen~ patch. Any clue about how to debug/attempt resolution would be much appreciated. 

I did make a change - I added a gen subpatch taken from GSOT Ch 9 (wavetable_sincmipmap_sample.max.pat). But I've used this exact gen subpatch before with no issues. 

697-failed-to-compile-genpatcher

I found the problem. The gen~ patch was missing the declaration of a 2ndary buffer.  Once it was added genpatcher compile errors went away. 

It would be great to have better error messages coming out of gen. 

697: failed to compile genpatcher

soundyi

Hi there,
I stumbled upon this weirdness of code generation issue, where an essential else block is dropped … most probably as the value set inside the else block is not directly part of the jit.gen codebox outputs.

If you run the attached patcher it works as expected, as I added a workaround via a variable called dummy.

If you open the jit.gen patch and also the „code“ sidebar, watch what happens if you comment out line 41 with the else block surrounding it : it disappears aka its optimised away.

And executing the patch leads to wrong results - as the logic depends on the boolean flag reset in this else block.

It took me quite a long time, to encircle the cause … and by the way I also stumbled upon the issue that assigning 1-plane vectors to the outputs via „out1 = vec(42)“ leads to a non interpretable compiler error and has to be done in a scalar fashion „out1 = 42“ … weird too, especially as this error is not hinted in the codebox, but only if one executes the parent patcher.

I can image some „code work“ to substitute the dropped boolean logic … but why shall I ???

To some extent its recognisable that the else block gets optimised away, as there is only 1 variable changed inside and this does not directly contribute to the output … BUT if this kind of thinking really rules, we end up in a assembler programming style … and if I am forced to develop software (and especially pieces of art, which should be a joy !) in this mind boggling kind of thinking, I am better off beaming myself back into stone age ;-).

Why do you drop into the darkness of codebox in the first place, you may ask? Stay in the joyful field of operators patching in a „normal“ jit.gen patcher and everything is fine, you may argue ;-).

Yes, I really would like to do so … but I need the sweet sugar of „loops“.

As an example : scanning matrices (or textures with jit.gl.pix) in rows or lines, or the surrounding area of a pixel is very easy to do with a for loop.

So patching generative art in the style of „nature of code“ (flow fields, boids flocking and alike), its a great option to have the codebox and its for & while loop features.

JitGen Code Generation Optimization Issue.maxpat

Hi there,
I stumbled upon this weirdness of code generation issue, where an essential else block is dropped … most probably as the value ... 

codebox-in-jitgen-code-generation-issue-essential-code-gets-optimised-away

Codebox in Jit.Gen : code generation issue - essential code gets optimised away

Let's create dark experimental industrial drone texture with gen~ process!!!!!!
If you like this type of content,please press like on this video and subscribe to my youtube channel!!!
THANKS!!!

Let's create dark experimental industrial drone texture with gen~ process!!!!!!
If you like this type of content,please press like on this ... 

sharing-sound-design-ideas-create-dark-industrial-texture-with-gen

[sharing sound design ideas] create dark industrial texture with gen~

Live Patching ambient sound design with mc.gen~ and mc.2d.wave~.
If you like this type of content,please subscribe to my YouTube channel for more Max/MSP sound design videos!!! THANKS!!!!!!

Live Patching ambient sound design with mc.gen~ and mc.2d.wave~.
If you like this type of content,please subscribe to my YouTube channel ... 

live-patching-ambient-soundscape

[Live Patching video] ambient soundscape

polyrhythmic ambient sound design with mc.gen~.
Max/MSP sound design videos : https://youtube.com/@axersfall369
Please subscribe to my youtube channel if you like this type of content,thanks!!!


polyrhythmic ambient sound design with mc.gen~.
Max/MSP sound design videos : https://youtube.com/@axersfall369
Please subscribe to my ... 

sharing-sound-design-ideas-multichannel-polyrhythmic-ambient

[sharing sound design ideas] multichannel polyrhythmic ambient

C Hausch

i want to generate dynamic hadamard matrices for a fdn reverb on the fly. i found a usuable code here https://www.geeksforgeeks.org/generate-hadamard-matrix-of-given-order/ 
and managed to replicate this in javascript inside of max.

now to actually use this i need to somehow put the code inside of a gen~ patcher, as feedbacks will be mandatory.

so the question is: can i generate codebox code inside of a gen~ patcher with javascript from outside of it?

any help would be highly appreciated!
thank you!!! 



hi everyone,
i want to generate dynamic hadamard matrices for a fdn reverb on the fly. 

dynamically-generated-code-possible

Check out the gen~.dynamicexpr.maxpat patch in the examples folder for gen~ 

👍 just what i was looking for! 
thank you very much!
☺️


Cycling '74 Forums

In this video series,I will show you how to design waves in gen~ for some LFO modulation and wavetable synthesis position control(or you ...

Thanks. I actually caught the end of this live yesterday! will check out your solutions more deeply.

Yes, maybe!

got this far with the help of a tutor, but he couldn't figure it out in the end. we are 90% there but its not working yet.

I found the problem. The gen~ patch was missing the declaration of a 2ndary buffer. Once it was added genpatcher compile errors went away.

Hi there, I stumbled upon this weirdness of code generation issue, where an essential else block is dropped … most probably as the value ...

Let's create dark experimental industrial drone texture with gen~ process!!!!!! If you like this type of content,please press like on this ...

Live Patching ambient sound design with mc.gen~ and mc.2d.wave~. If you like this type of content,please subscribe to my YouTube channel ...

polyrhythmic ambient sound design with mc.gen~. Max/MSP sound design videos : https://youtube.com/@axersfall369 Please subscribe to my ...

👍 just what i was looking for! thank you very much! ☺️