2021 BUILD PHOTOS

Grumble

A Flanger with a twist: FlangED

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Blue Hell · Posted: Fri Jan 08, 2021 8:08 am Post subject:

Ah the new thread is up - happy new thread Exclamation

It'd flange with the proper modulation .. but .. what is the twist?

With the slow changes used in the demo it's like Karplus Strong Cool

Grumble · Posted: Fri Jan 08, 2021 2:04 pm Post subject:

The twist is that I use an attenuverter to control the feedback.

Blue Hell · Posted: Fri Jan 08, 2021 2:23 pm Post subject:

Ah, ok, had seen that before .. for the Nord Modular G2 I think .. checking .. yup G2.

AlanP · Posted: Fri Jan 08, 2021 8:19 pm Post subject:

Is that a 3d printed panel? How well does that work?

Grumble · Posted: Sat Jan 09, 2021 7:04 am Post subject:

Yes, it’s 3D printed and it is working really well,
First I start printing the panel and as soon as the printer starts to print the characters which are about 1.5 mm high, I pause the printer, change the filament to another color and resume printing. So you need to keep an eye on the printing progress.
I learned that 3mm thick panels is a good thickness but also that it needs more than one attachment screw for top and bottom fixture because else it would bend too much when plugs are pulled from the panel.

Grumble · Posted: Sat Jan 09, 2021 7:05 am Post subject:

Grumble · Posted: Mon Jan 18, 2021 3:48 pm Post subject:

https://electro-music.com/forum/topic-72453.html

4 channel quadrature LFO.

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AlanP · Posted: Sat Jan 23, 2021 9:58 pm Post subject:

L-1 PSU, Elby rails, wood from an old TV stand. Dead simple.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

And already mostly full Cool

PHOBoS · Posted: Sat Jan 30, 2021 8:28 am Post subject:

yeah I think you're going to need a bigger case alan Shocked

here's a circuit bend video switcher (V-Guard VA-203) for some CV controlled glitchyness and it has 2 build in LFO's to use instead of a CV. shakng2

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Psynth · Joined: Jul 18, 2018 Posts: 22 Location: UK Audio files: 5

Turing Machine (MKII) with integrated Volts and Pulses expanders and a few mods.

Be interesting to compare this with the CGS Infinite Melody and the Klee.

(For some reason, the images have been rotated in posting...)

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And the rat's nest

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Front panel

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Skrog Productions · Posted: Tue Feb 02, 2021 12:16 pm Post subject:

Nice Flanger and Lfo Grumble Smile

Handy new diy box Alan Smile

that looks great Pho Smile

Nice panel & turing machine Psynth Smile

is that a rivet pattern on the panel art, looks great

Dave

Psynth · Joined: Jul 18, 2018 Posts: 22 Location: UK Audio files: 5

Thanks, yes it's an image of the side of a shipwreck; wooden knobs when I get round to making them complete the look.

Psynth · Joined: Jul 18, 2018 Posts: 22 Location: UK Audio files: 5

Slightly off topic, but I did a comparison of various sequencing modules as I suggested above, and here is the audio file.

Just a sawtooth driven by the CV output of each module in turn, after passing through a quantiser, with a simple envelope.

0-1min is the Klee in 8 step and Random mode with white noise as the random source.
1-2min is the Turing Machine in 8 step fully random mode, then from 2-3.5min I adjust the mode knob slowly towards lock - in the intermediate positions the sequence changes progessively less frequently.
3.5-4.5 min is the Infinite Melody in Random mode
4.5-5.5 min is the Infinite Melody in 1/f mode.

They all of course have lots of other features that distinguish them and make them all useful, but to my ears, the Klee is very random, the Turing Machine exhibits more runs on notes, and the Infinite Melody in 1/f is the most melodic with more passages.

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Psynth · Joined: Jul 18, 2018 Posts: 22 Location: UK Audio files: 5

Waveform Animator, based on the ETI waveform multiplier, with a number of mods:
Dual unit: two separate animator sections, driven by a single set of modulating LFOs;
Input Type control, permitting use of either 0-10V inputs or +/-5V inputs;
Modulation section provides six animating waveforms, in two banks of three (Mod#1-3 and Mod#4-6), with four-way Modulation Speed switches for each bank to select between Slowest, Slow, Normal and Fast;
Mod#1 can also be switched to an External source;
Outputs modulated by subsets of the modulators: Mod#1 only, Mod#1-3, Mod#4-6 and All Mods.

Nice for beefing up a single oscillator, or two oscilators tuned a fifth apart.

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Grumble · Posted: Tue Mar 30, 2021 9:51 am Post subject:

6 voice 4operand YMF262 Midi controlled player.
Soundchip is the Yamaha YMF262, the processor is a BluePill STM32F103, programmed using the Arduino IDE.

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