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Lume

I'm new to gen and not a very good programmer, so was wondering if anyone would look at my patch

and see if anything could be done about the efficiency of [gen~] in this patch.

The patch is an attempt to imitate stochastic synthesis, and uses [codebox] to write sample values in a

triangular shape to a Data object. My guess is I'm missing something with regards to for() loops and

Average audio CPU usage shows 8.81% with gen taking 90.5% of that.

I'm new to gen and not a very good programmer, so was wondering if anyone would look at my patch
and see if anything could be done about the efficiency of [gen~] in this patch. 

The patch is an attempt to imitate stochastic synthesis, and uses [codebox] to write sample values in a
triangular shape to a Data object. My guess is I'm missing something with regards to for() loops and
if(), but it could be something else. 

Average audio CPU usage shows 8.81% with gen taking 90.5% of that. 

codebox-efficiency-for-loop-and-if

took only a quick look(and couldn't get sound to output?), so i could be wrong, but it seems the 'for/if' stuff looks fine, except the calculations happen every single sample(you're running the 'for' loop through 512 iterations for each sample at the audio-engine's sampling-rate), and this seems like overkill to change the wavetable of an oscillator?

i think the oscillator wavetable need only change once after each time the wavetable is read through(once every 'phasor' cycle; so maybe you could use a 'change' or 'delta' op within gen~ to detect the start of 'phasor', and then use that to trigger an 'if' condition within codebox which would then iterate through the 'for' loop, only once each phasor's cycle).

then again, maybe something i never realized about stochastic synthesis is that it IS supposed to change every sample? (...but then that seems like it would simply create a very aliasy sounding set of triangular waves...) ...anyways, just my ideas on efficiency...

took only a quick look(and couldn't get sound to output?), so i could be wrong, but it seems the 'for/if' stuff looks fine, except the calculations happen every single sample(you're running the 'for' loop through 512 iterations for each sample at the audio-engine's sampling-rate), and this seems like overkill to change the wavetable of an oscillator?
i think the oscillator wavetable need only change once after each time the wavetable is read through(once every 'phasor' cycle; so maybe you could use a 'change' or 'delta' op within gen~ to detect the start of 'phasor', and then use that to trigger an 'if' condition within codebox which would then iterate through the 'for' loop, only once each phasor's cycle).

then again, maybe something i never realized about stochastic synthesis is that it IS supposed to change every sample? (...but then that seems like it would simply create a very aliasy sounding set of triangular waves...) ...anyways, just my ideas on efficiency...


Thanks, Raja. Super helpful, I was wondering about how often the for loop is running.

You're right about changing every phase of the wave too, otherwise it leads to distorted effects which seems to be the kind of sound-world covered by this release:

https://cycling74.com/tools/db-bounce-chaotic-triangle-wave-oscillator-bank/

btw, to get audio going you need to start the Clock, move some params around and choose a fundamental... maybe.

I've change the way the patch works and UI elements have been moving around, so might not be clear

Thanks, Raja. Super helpful, I was wondering about how often the for loop is running.
You're right about changing every phase of the wave too, otherwise it leads to distorted effects which seems to be the kind of sound-world covered by this release:
https://cycling74.com/tools/db-bounce-chaotic-triangle-wave-oscillator-bank/

btw, to get audio going you need to start the Clock, move some params around and choose a fundamental... maybe.
I've change the way the patch works and UI elements have been moving around, so might not be clear
how to get sound on first use!

Average 3.36% CPU. Booyah.
Raja, you legend.


i really find this patch interesting. quick question, what is preventing me from seeing all the objects and connections. it seems like a phantom patch! would like to dissect it and learn more.

i really find this patch interesting. quick question, what is preventing me from seeing all the objects and connections.  it seems like a phantom patch! would like to dissect it and learn more.


It's in Presentation Mode, which hides the connections.

Control + alt + E on PC to switch to edit mode.

It's in Presentation Mode, which hides the connections.
Control + alt + E on PC to switch to edit mode.
Command + alt + E on Mac (from memory).


Attached the latest version. Has some improvements.

I did an update. You can draw the oscillator shape in the function (though still restricted to triangle type waves).

I did an update. You can draw the oscillator shape in the function (though still restricted to triangle type waves).
And the controls are simpler.
Thanks for the kind words.


I recommend opening 3 or 4 instances, you can get quite a thick sound.

I'll probably make a [poly~] version at some point.

Cheers. I am quite happy with it.
I recommend opening 3 or 4 instances, you can get quite a thick sound.
I'll probably make a [poly~] version at some point.


Codebox efficiency / for loop and if