FFT Effect Modules

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circuitburst
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FFT Effect Modules

Post by circuitburst »

I thought I'd start a new topic dedicated to FFT Effect modules, since there doesn't seem to be one and we are entering a new frontier in terms of FFT capabilities in Eurorack. I got inspired after watching the recent interview with Paul Schreiber of Synthesis Technology discussing the E520

Initial list (newest to oldest):
E520 Hyperion Processor [Synthesis Technology]
Panharmonium [Rossum Electro-Music]
Clouds (Spectral Madness mode) [Mutable Instruments]
ADM15 Spectre [Audio Damage]

These two I'm not sure about, but I'm guessing they should be included?
Odessa [Xaoc]
Super Signal Processor (SSP) [Percussa]
"make the events occur that you want to occur" - the black dog

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circuitburst
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Post by circuitburst »

Also just for reference, this is where we were 4 years ago...
viewtopic.php?p=1982167&highlight=#1982167
Regarding Clouds' spectral mode: it was what the module was designed to do originally (it wasn't even called Clouds), but I ditched it because of the latency. You can't have low latency with (FFT-based) spectral processing.
"make the events occur that you want to occur" - the black dog

https://soundcloud.com/circuitburst
https://www.modulargrid.net/e/racks/view/295055
:boat: World Map of Eurorack Module Manufacturers: https://www.google.com/maps/d/u/0/viewe ... 9IMDP34-ao
World Map of Eurorack Module Physical Shops: https://www.google.com/maps/d/u/0/viewe ... gfSeJ6wVIG
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lohacker
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Post by lohacker »

I don't have it but probably Nebulae can load some FFT patches written in PD
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lohacker
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Post by lohacker »

Similarly Salt by Rebel Tech
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xaoc_tech
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Post by xaoc_tech »

Just to clarify, Odessa does not use FFT, because that would cause latency and would not allow realtime audio rate modulations. Odessa does all the hard work in time domain, running thousands of individual oscillators and updating their parameters in real time, sample by sample.
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circuitburst
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Post by circuitburst »

For those curious about the FFT details in the upcoming E520...
https://synthtech.com/eurorack/E520/
Spectral effects are processed in the frequency domain using the Fast Fourier Transform. All spectral effects in the E520 use a 1024 point complex FFT to provide two 512 point real transforms at a rate of 2.7ms which provides a good compromise between time and frequency resolution, while allowing full stereo processing for most effects. Frequency resolution is 512 bins of 48Hz each.
Currently, there are 5 Spectral algorithms: Spectral Crusher, Spectral Time Machine, Spectral Delay + Pitch Shifter, Spectral Delay, and Variable-Band Spectral Vocoder
Audio demos of these can be found here (scroll down half way down the page):
https://synthtech.com/eurorack/E520_DEMO/

Also here's the E520 thread:
viewtopic.php?t=221337
"make the events occur that you want to occur" - the black dog

https://soundcloud.com/circuitburst
https://www.modulargrid.net/e/racks/view/295055
:boat: World Map of Eurorack Module Manufacturers: https://www.google.com/maps/d/u/0/viewe ... 9IMDP34-ao
World Map of Eurorack Module Physical Shops: https://www.google.com/maps/d/u/0/viewe ... gfSeJ6wVIG
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