Granular Engine



  • This is a bit counterintuitive, but the granular node is not polyphonic so you need to use it in the monophonic slot.

    Granular synthesis normally handles multiple notes by distributing the (fixed amount of) grains across all pressed notes. So if you press one, key, 100 grains will play the single note. If you press another key, 50 grains will play the first note and 50 grains will play the second note (in a random order of course).

    However this means that you do not require a polyphonic system which contain a state for each voice.

    So:

    • put in in the FX slot
    • put it into a container.midichain node (this will make it process the midi data which is disabled by default for effects)
    • use the Position parameter to scan the waveform.


  • @Christoph-Hart Ahh... Ok... I tried a bit today and was using it in the scriptnode synthesizer module... so midi was working already... But that note distribution that you are describing thing is interesting and will prevent it from blowing up the computer I guess... I'd love to have some control over the attack and release values of the grains, but for that I'd probably have to go down the rabbit hole a bit further...

    Edit: Does GrainSize alter the chunk of audio that is being played and adjust the triggering (timer) accordingly? So it'll play more audio but less often?



  • I'd love to have some control over the attack and release values of the grains,

    Yes I also thought about adding that. I prototyped the entire node in SNEX and there you could just change the attack and release time as some internal parameters (similar to fiddling around with Shadertoy stuff lol), but that's certainly a useful parameter to expose.

    I'm currently working on multisample support for this (and the other file-based nodes) so you can drop sample maps and SFZ files in there.



  • Is this node in the scriptnode_codegen_rewrite build? I am not finding it in the current scriptnode version of Hise...



  • @crd Yep it's in the codegen rewrite.



  • What I am noticing though when using the granulator module is that CPU is hovering around 20%... But maybe I am doing something wrong here. I’d love to have a look inside this thing...



  • Yeah it‘s not optimized yet so if you bump up the grain density it burns unnecessary CPU cycles...



  • I just compiled codegen to experiment with this. It sounds interest but this type of fx would be way more useful to me applied to a sampler's sample map rather than embedded audio. I am having some success manipulating the midi into a sampler but just need to script some sort of voice stealing method to keep the number of voices down. As long as I don't play a 5 note chord everything works great.



  • @crd

    I'm currently working on multisample support for this (and the other file-based nodes) so you can drop sample maps and SFZ files in there.

    I think Christoph is working on this actually... This looks quite promising to me honestly... I mean the whole SNEX workbench thing is quite awesome I find... Not that I am on top of things yet, no, but there are tons of things you could do with it...

    I was actually also trying to look into a more controlled way to handle voice count in my engine... still working on it.



  • @UrsBollhalder

    whoops... sorry I missed that. yeah, that sounds amazing! The option of being able to work with all the DSP stuff is definitely exciting.



  • Anyone know where I can find the code for the Granulator to paste into a SNEX node? 🙂



  • @Christoph-Hart said in Granular Engine:

    This is a bit counterintuitive, but the granular node is not polyphonic so you need to use it in the monophonic slot.

    Granular synthesis normally handles multiple notes by distributing the (fixed amount of) grains across all pressed notes. So if you press one, key, 100 grains will play the single note. If you press another key, 50 grains will play the first note and 50 grains will play the second note (in a random order of course).

    However this means that you do not require a polyphonic system which contain a state for each voice.

    So:

    • put in in the FX slot
    • put it into a container.midichain node (this will make it process the midi data which is disabled by default for effects)
    • use the Position parameter to scan the waveform.

    When I do as you instructed, the granulator works just fine. As soon as I try the same thing in the scriptnode synthesizer, I get clicks and pops. Is there anything additional I need to do to make it work there?



  • @UrsBollhalder

    Where exactly are you putting the granular fx when you get it to work? I am getting crazy noise wherever I put it using a script FX or script node synthesizer using a sample map as a source.

    (Unrelated, I have been getting good results with a script to limit the voices before a timer based granular script...)



  • Have you Guys Exported Your Project With Granulator Node?

    Here Ableton Says That It Not Compatible 🤔



  • @crd I just did what Christoph said in his post... so in the midichain container basically... That does the trick. Also for sample maps...

    Screenshot 2021-06-30 at 22.18.15.png



  • @Natan said in Granular Engine:

    Have you Guys Exported Your Project With Granulator Node?

    Here Ableton Says That It Not Compatible 🤔

    No. Not yet... I am playing around with it but I am mainly using my own Midi Script Processor that I wrote for the granular stuff... which works like a charm I have to say. And also I just don't feel at home yet with the whole scriptnode thing. But working on it! So Ableton complains specifically about the granulator node??



  • @UrsBollhalder

    Sorry I should have been more clear, where are you placing the dsp script in the tree structure?

    When I put it in as a ScriptFX, I am getting silence. It also seems to be sending a bunch of DC noise to the left out...
    As a scriptnode synthesizer, it works but I am getting mostly just glitch. (Not granular glitch 🙂



  • @crd said in Granular Engine:

    @UrsBollhalder

    Sorry I was more clear, where are you placing the dsp script in the tree structure?

    When I put it in as a ScriptFX, I am getting silence. It also seems to be sending a bunch of DC noise to the left out...
    As a scriptnode synthesizer, it works but I am getting mostly just glitch. (Not granular glitch 🙂

    Right now I have it in a container -- FX -- Script FX1... so no sampler, no nothing, just the Script FX!

    Screenshot 2021-06-30 at 23.22.05.png



  • @UrsBollhalder

    Thank you.

    Importing a single note works well. Using a sample map results in nothing but glitchy noise. Something similar to the granular engine in Omnisphere using sample maps in Hise would be incredible.



  • @crd said in Granular Engine:

    @UrsBollhalder

    Thank you.

    Importing a single note works well. Using a sample map results in nothing but glitchy noise. Something similar to the granular engine in Omnisphere using sample maps in Hise would be incredible.

    I remember having the same issue sometime ago… I am not sure what’s changed. Are you on the latest commit?


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