Making LFOs more complex

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dooj88
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Making LFOs more complex

Post by dooj88 » Thu Aug 20, 2020 9:57 am

what are your favorite ways of modulating/processing your simple LFOs to get more complex results? obviously you could just say 'use the CV jacks and modulate them,' but i'm interested in things you've gone back to doing. i've got wavetable lfos as well, but i want to push the simpler ones harder.

thought it might be fun to share some ideas and maybe learn a thing or two. so i'll throw out the obvious ones and add a few favorites:
-mixing two together in a mixer
-sequence into v/oct or fm inputs
-running through a modulated filter and fed back to itself
-free running lfo through an CVable offset controlled by another synced to a clock

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EASYBOY
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Re: Making LFOs more complex

Post by EASYBOY » Sun Aug 23, 2020 1:08 am

Great ideas.
Finally the pitch range of my turing machine is controlling all my LFOs

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wiggies
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Re: Making LFOs more complex

Post by wiggies » Tue Aug 25, 2020 10:18 pm

LFO into wavefolder. Then modulate the wavefolder. Maybe with the LFO.

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Re: Making LFOs more complex

Post by hawklord2112 » Wed Aug 26, 2020 4:51 am

running it and a faster attenuated/polarised lfo into my doepfer Max/Min (a massively underused module in my rack) gives a bit of a wobble at the top / bottom of the cycle maybe?
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Re: Making LFOs more complex

Post by hawklord2112 » Wed Aug 26, 2020 5:02 am

and / or running it through a bit crusher / modifier can be funtime
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Re: Making LFOs more complex

Post by lisa » Wed Aug 26, 2020 5:06 am

Run it through a filter and crank up the resonance to get a hairy version of the LFO.
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hawklord2112
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Re: Making LFOs more complex

Post by hawklord2112 » Wed Aug 26, 2020 5:47 am

lisa wrote:
Wed Aug 26, 2020 5:06 am
Run it through a filter and crank up the resonance to get a hairy version of the LFO.
oh my
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Re: Making LFOs more complex

Post by SJ900 » Wed Aug 26, 2020 2:46 pm

lisa wrote:
Wed Aug 26, 2020 5:06 am
Run it through a filter and crank up the resonance to get a hairy version of the LFO.
I would never have thought of that, but it did make me wonder what would happen if a LFO was passed through a wavefolder - the result is ... complex

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Re: Making LFOs more complex

Post by electricanada » Wed Aug 26, 2020 2:56 pm

hawklord2112 wrote:
Wed Aug 26, 2020 5:02 am
and / or running it through a bit crusher / modifier can be funtime
Lfo into A-189-1 into quantizer makes a nice sequencer.
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Re: Making LFOs more complex

Post by Keltie » Wed Aug 26, 2020 3:00 pm

+1 on min max. MI kinks works well for this.

Mixing via a mutes module so you can knock in / out various parts of the sum works nice for me too.

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Re: Making LFOs more complex

Post by yhf » Wed Aug 26, 2020 4:02 pm

I like to send two or three (often slow) unsynced square wave LFOs into a digital logic module and take the various outputs ("And", "Or" etc.) to trigger sounds, start envelopes, advance or reset sequences and so on. What you get, basically, is ever-changing time windows in which those triggers, modulations etc. can happen. I use the Doepfer A-145-4 and A-166 for this but any LFO(s) and (digital) logic modules should be fine.

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Re: Making LFOs more complex

Post by dragulasbruder » Sun Aug 30, 2020 12:04 pm

Sample-Hold feedback is fun--LFO clocks SH, SH sampling noise (or anything), SH feeds LFO CV input, take any shape for per-cycle randomized speed. This is *really* fun when you use this LFO as the clock source, especially if you have control over the amplitude of signal at the SH's sample input.

Another great sample-hold one is a "baby rungler" patch. LFO1 clocks the SH, LFO2 feeds the sample input. SH output goes back to CV inputs of the two LFOs. An attenuverter for the feedback path from SH to LFO2 is super helpful, because negative feedback acts pretty different. Even just a tiny bit of feedback gets this patch pretty spicy. Tap any signal from anywhere, they're all doing something cool. And yes, this sounds dope at audio rate.

Multiplying two LFOs with a DC-coupled ring modulator/BPVCA is really cool, sync can also helpful here. This also works great with a clock-synced digital LFO and a free-running analog one.
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Re: Making LFOs more complex

Post by dragulasbruder » Sun Aug 30, 2020 12:09 pm

SJ900 wrote:
Wed Aug 26, 2020 2:46 pm

it did make me wonder what would happen if a LFO was passed through a wavefolder
I watched this Rob Hordijk video and then started trying to pass *everything* through wavefolders. Sequences! Envelopes! basically anything but a raw square wave, gate or trigger does something inspirational.
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Re: Making LFOs more complex

Post by natureclubcassettes » Sun Aug 30, 2020 12:18 pm

My 143-9 is pretty much always patched as such:

1. Random output from 118 into CV 1 jack (the 118 random out has a built in output attenuator, perfect for this; the bipolar signal signal works great with the bipolar LFO it is affecting)
2. Inverted sine or inverted cosine patched back into CV 2 jack, attenuverted in either direction.

Lots of really wild modulation to be found in this simple quadrature sine LFO....

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Re: Making LFOs more complex

Post by Rex Coil 7 » Sun Aug 30, 2020 2:51 pm

dooj88 wrote:
Thu Aug 20, 2020 9:57 am
...-mixing two together in a mixer ...
Nope ... get funky ... mix four LFO signals together in a quad VCA/voltage controlled mixer. Then move around all four VCA outputs using a Planar2 joystick (vector control). Or go with two LFO signals into a VC mixer/VCAs and control with a vector controller ... use the unused two vector channels to control the two LFO frequencies/speeds. So the vector joystick is controlling the LFO mix and the LFO speeds both independently. I think the Planar2 actually has four VCAs in it, and can send vector control and XY control simultaneously. Pick a couple of LFO sources and plug up!

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Re: Making LFOs more complex

Post by electricanada » Mon Aug 31, 2020 5:19 pm

Nice thread. I have collected a number of patch ideas for my patch idea notebook.
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Re: Making LFOs more complex

Post by CrysWiz » Mon Sep 28, 2020 10:25 pm

Freq mod one LFO to the next to the next. Do logic manipulations. Run them through stuff like NonLinear Circuits Neuron and similar.
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thelowerrhythm
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Re: Making LFOs more complex

Post by thelowerrhythm » Mon Sep 28, 2020 10:32 pm

Hands down, Vector Space.
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thetwlo
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Re: Making LFOs more complex

Post by thetwlo » Mon Sep 28, 2020 10:41 pm

thelowerrhythm wrote:
Mon Sep 28, 2020 10:32 pm
Hands down, Vector Space.
or Wiard Jag, or NLC Let's Splosh.
Also, XAOC Samara, Plan B Model 14, Circuit Abbey Gravity Well, Horstronic Waveslicer....

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pekbro
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Re: Making LFOs more complex

Post by pekbro » Mon Sep 28, 2020 11:00 pm

I just use an envelope, and then modulate it with an LFO.

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dragulasbruder
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Re: Making LFOs more complex

Post by dragulasbruder » Tue Oct 06, 2020 8:55 pm

analog logic is your friend here too. max/min functions are really great for when you want a complex shape.
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Re: Making LFOs more complex

Post by sir stony » Wed Oct 07, 2020 2:18 am

LFO into comparator, adjust the threshold to target a specific part of the wave, and with that, trigger something else to shape the lfo waveform, could be a short fuzziness by a wavefolder, or a stuttering by a gate/vca, or a ducking/expanding dynamic effect, or... well, this is modular, just think up something ;)

a very late PS.: I find that unless you are in real need for a very particular kind of modulation like this, for example when going for the sound design for an engine kind of thing, in the musical aspect it's usually not worth the effort and number of modules needed. I was just now taking a look at what else I could do, and while there are countless ways, looking beyond the initial question of reshaping an lfo, the result is typically one that we could have had far easier by using a wavetable lfo or simply a (looping) envelope. Basically, that was my initial idea of going modular at all: get an lfo and modulate it to hell and back, using it as clock source, splitting and delaying it, slew the parts, mix them back into one, offset or inverted, add noise, add random values with s&h... and if you stop that lfo, it all dies. That was my first rack concept. :)

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