Groc Granular Engine: Filter and Placement
ฝัง
- เผยแพร่เมื่อ 8 พ.ค. 2024
- One of the great benefits of working on a 4-core ARM A72 for granular synthesis isn't just producing a lot of grains, it is having the compute to do signal processing on the grains - like binaural spatialization, filtering, bit crushing and so on. In this example we show how to adjust Groc's grains filter bandwidth, center and introduce random variation per grain. We also demonstrate how to use the placement and scatter parameters to create a spinning effect and to increase the width of a sound. At the tail end we show a couple of the extra LFO parameters and then how to modulate a secondary parameter via the orange encoder.
Reserve a Groc now: www.oddment-audio.com/shop
Very tempting! The screen actually showing the grains is fantastic. 🎉
Yeah, this is getting better and better. I am used to something similar from the Tasty Chips GR-1 (which has a few shortcomings, like no audio in and a terrible file system) and I'm very happy to see a proper visual implementation on the Groc screen.
Thank you!
The ui looks super good! I can't wait to get this in hand and patch my strega units into this :)
Beautiful work John!
Thanks so much. Little by little. There are still a few big things to change and add.
@oddmentaudio5754 the bones look great, and you have a lot of time to get the UI hammered out.
Are you excited for Superbooth this coming week?!
Damn! I never heard of this until rn end clicked the link expecting to see some teenage engineering price that made me close the tab immediately 🤣 this is really badass! 🙌🔥
$795 + tax and shipping is pretty teenage engineering
Glad I got your email thanks absolutely beautiful ❤️
GROC vs TORSO S4. The S4 runs on a Raspberry Pi....whats under the hood of the GROC?
Yes, also an RPI. The amount of compute and RAM is in another world from MCUs, so they are an appealing choice for these dedicated granular products with multiple layers, polyphony and substantial signal processing.
❤️🎛🎛
How is pitch scaling implemented?
Everything is done in the time domain, re-sampling to adjust each grain's periodicity. If you have long enough grains, you will generally then get the pitch of the original sample adjusted by the resampling factor. But as the grains are shorter, the inter-grain interval (space between grain playback) strongly influences the perceived pitch. The most artifact-free pitch shifting algorithms will do pitch some periodicity analysis on the input sound to control both the grain size and the inter-grain spacing (e.g. PSOLA). We will offer this and even some more modern flavors, but at the moment, the implementation puts all the controls in the users hands with the grain size and grain overlap controls. You can achieve nice and smooth sounding pitch shifting but may find the controls need some tweaking across different samples to achieve this. The benefit is that you can seamlessly move from smooth pitch shifting to nasty ring modulation artifacts, bc sometimes that sounds awesome!
@@oddmentaudio5754 I admit need to look more into the different compensations. But I of course I know psola as is used in variphrase!! So that's exciting news!
Impeccable design, 'marketing', and pr skills, btw, cheers!
Is it possible to round robin multiple patches with each key press?
Not yet but I can definitely make it so! The (not yet shown) morph knob will morph/blend between the first two layers. Maybe there are several variations we can think of including a round robin mode.
@@oddmentaudio5754 That would be very cool. There are so many different ways to implement voicing options to achieve different kaleidoscopic textures and effects…it’s a shame more synths don’t offer more polyphonic alternatives to the usual voicing algorithms.
Currently all the grains parameters have a randomization that can be applied. All the demos I have shown apply this per grain (and a voice consists of many, many grains). We also have a mode where the randomization is done per note played. So, for example, if you randomize the grain size, the default behavior provides variation within each note, but this alternative would randomize the grain size each time you hit a note. This is the kind of thing I will work into the "secondary" parameters that you can touch via the screen.
@@oddmentaudio5754This is all great stuff and right on point. A round robin playback algorithm or two would really kick this beautiful little beast into stratosphere level👍
PS: Happy Superboothing!
will be cool if when the modulated knob is moving the light turn on and off
Hi thanks for your comment. If I understand you correctly, I think that's what we'd like to achieve - the LED of the destination parameter moves with the modulation source.I think it can be nice but also create some confusion bc the LEDs can show other things too. Let me know if I misunderstood; I think there's room for iterating on usage of the LEDs.
Is the Groc powered by Usb c?
Yes, but we are adding a DC barrel so it could be used w/o USB altogether also. In all of these demos so far I am just using USB for everything. We should have all the other jacks up and running really soon.
@oddmentaudio5754 In that case, this might be the perfect device for me. You have a buyer good sir!!
Looks neat, probably well thought out and built but presented so boring. You won't get disciplined for using grains in other ways than just heavenly ambience. So step up and and demonstrate something different, cool processing of voices, rhythms and whatnot. And not just this pling-swosh-pling swamp, like everybody else. Rock on !