Showing posts with label Frac. Show all posts
Showing posts with label Frac. Show all posts

Monday, July 01, 2024

10.24.2018 Scrotum Lab - Tresses (testing... testing...)

video upload by batchas

"Testing and running a freshly built Scrotum Lab Tresses."

Tuesday, June 25, 2024

28 10 18 BugBrand Modular System 02x

video upload by batchas

23 09 18 Bug & Buch & SLab

video upload by batchas

Wednesday, June 19, 2024

BugBrand Weevil Module

video upload by BugBrand

"A basic walk-through of the new Weevil module for BugBrand Modular.
1) the individual oscillators, then RingMod1 + Power Starve behaviour
2) processing a static VCO
3) then using a rhythmic gate into the audio input
Support from Penrose plus, off camera, a CVCO & the ever present DDSR.

via BugBrand

"Back in the Old-Blues days, I tried to port the Weevil design into the modular format but it was a challenge.. The circuitry of the regular Weevils is really very simple & the chaos comes from circuit-bending (an unconventional approach!) – the difficulty was how to add voltage-control features to this simple circuitry (modular approaches are quite a bit more involved). So while I did a design back then which was enjoyed by bug-users (SYN1 Weevil), I never thought it quite captured the chaotic sonic worlds of the ‘true’ Weevils.

For a few years I put the Weevils to bed, but have recently come back to thinking on them – so, looking again at modular approaches, I’ve come up with something that I feel works things a bit differently and, while it still feels a bit different from more regular/simple Weevils, it offers a whole host of chaos & noise.

See the block diagram!

First off we have the power starvation core – this unfortunately couldn’t viably be voltage-controlled. Turn the Starve dial fully clockwise for regular/full-power usage. When starved, everything goes a bit nuts, everything interacts & we get to much more noise-based areas, though note that all outputs pass through circuitry to ensure they remain ‘full-strength’ (all are 0V to +10V). There is also a Stable switch which adds a little smoothing – it isn’t exactly stable, but it is more-so/different.

There are two voltage-controlled oscillators ranging from c.0.5Hz to 20kHz from the front panel (they can go slower with external negative CV). There are CV inputs with depth controls & polarity/mute switches for each Osc plus a CV Both input which affects both Oscs. The Oscs track 1V/Oct reasonably well, but are not temperature compensated, nor do they have the best high-frequency tracking. The two Oscs interact a little, especially so when starved. Each Osc has an independent banana output + LED indicator.

The basis for Weevils was a simple cymbal noise-source generator which quasi-ring-modulated square waves together for richly (en)harmonic tones. Here we have a first RM combining the two Oscs, followed by a second which mixes RM1 with an external signal which has passed through a drive/squaring circuit so that it matches the Weevil-core (inc. starvation). This audio input is quite level dependent so do play with the Drive control – you can also input gates/clocks/etc. to the input which can generate some interesting behaviours when using Starve. Note that without an input signal, the output of RM2 will appear quiet (ie. it isn’t silent, but it isn’t regular amplitude).

All in all, the Weevil Module is inherently quite chaotic compared with my other module designs – that is, I feel, its strength & interest! Experiment, feed different signals in, feed outputs back into CV inputs, etc."

Sunday, March 31, 2024

Blacet Research Frac Rack Modular Synth System w/7 Modules & SKB Rack

Note: Auction links are affiliate links for which the site may be compensated.

via this listing, also on Reverb

"Tested and functioning as intended. Includes SKB rack and owner's manuals for 6 of the 7 modules.

Modules are:
BZ2300 Binary Zone
VCA2200 Quad VCA/Mixer
MODEL2040 Mixer/Processor
FF2030 Low Pass/Notch Filter
DSC2000 Dark Star Chaos"

Wednesday, March 27, 2024

BugBrand Introduces FilterQAmp - Filter, Amp and Decay Envelope Module in Frac Format


via BugBrand

"The FilterQAmp (FQA) combines a 2-pole State Variable VC Filter with a Linear VC Amplifier and an inbuilt variable-decay Envelope Generator. It is capable both of processing and, when the filter is self-oscillating, generation of synthesised sounds such as drums.

The VCF section contains a State Variable Filter (similar to my other designs) – this offers switchable Low or High Pass responses and covers the full audio range. It is temperature compensated & tracks 1V/Oct accurately. The Resonance/Q is voltage controlled with a linear response up to self-oscillation – this creates a pure sinewave, useful for synthesis.

The VCA is linear in response and takes the Low/Hi-pass output from the VCF section. It can either be set, via rear jumper, to a clean response (gain from 0 to +1) or saturation (gain from 0 to +1 then +/-5V zener clipping beyond – unity at approx 10 o’clock rotation).

The Filter, Q and Amp sections each have a CV Modulation depth control with switchable polarity (centre off) – the Filter has an additional 1V/Oct control input. In addition there is a simple variable-decay Envelope Generator which can be fired either with the manual Trig button or via the Trig input – this has a comparator so triggers on any signal over c.+1V. Decay time is variable between approx 15mS and 3Secs with an amplitude of 0 to +10V. The envelope is internally routed to modulate the Filter and Amp sections via individual depth controls – it could be manually patched to QCV with a 0.75″ shorting bar or cable.

When Q is set to full, the self-oscillating filter makes good sound generator – it can also ring when set below self-oscillation & fed with sharp edges such as gate signals. A basic drum synth can be achieved with self-oscillation and the decay envelope opening the VCA – try varying how much the envelope modulates the filter cutoff too. You can feed the main output back to the FCV input to self-modulate, resulting in an interesting peaky waveform."

Sunday, March 17, 2024

Buchla 252e + BugBrand

video upload by Precarious333 Music

"Just got my 252e back after repair. Running through some tests to refamiliarize myself with the features. This is just a simple test with 252e sequencing 4 voices. Two are using the VCOs from Buchla 259e Twisted Waveform Generator with one through Vedic Scapes 13700 band pass filter. Then there is a kick from Bugbrand DRM2 and a drone into glitchy high hat using Bugbrand Synth Voice modules. Used lots of off-grid timing on 252e to make it a bit wonky.

The bass is 259e principal oscillator with RED cells coming from the 8 and 16 rings. The band pass voice is 259e modulation oscillator sequenced from the GREEN cells of the 6, 8, and 16 ring so some triplets in there from 6. Kick is BLUE cells from the 16 ring. High hat is ratcheted by the subdivided pulses from rings 8 and 16. Using a mixer to mute/unmute off screen to the left.

Recorded as 2 tracks into Ableton Live. Compression and FXs added in post."

Sunday, February 11, 2024

02 10 24 BugBrand & Scrotum Lab

video uploads by batchas

02 10 24 BugBrand & Scrotum Lab
02 10 24 BugBrand & Scrotum Lab (02)
02 10 24 BugBrand PT Delay feedback

No external effects added.

Tuesday, February 06, 2024

Paia 2720 + 4700 (1970's DIY modular synthesizers)

video upload by Tinfoil Cat

"I've been telling myself for too long that I should post more Paia videos. This is an old video shot before I fixed the keyboard on the 2720 (broken sample and hold as you might hear). The main part is 4700, the 2720 helps out with a fourth VCO. The spring reverb is a little noisy.

These were available as kits from Paia starting in the 1970's. The 2720 is closely related to the 2700 that arrived on the market over 50 years ago!"

Interesting side note via

"Frac rack, FracRak or Frac, from Fractional Rack, is the modular synthesizer format designed by John Simonton of PAiA. It has a mainly USA following largely through the popularity of Blacet modules.

Like the Eurorack format, Frac is considered a 3U format..."

Saturday, January 27, 2024

01 27 24 BugBrand Modular & Scrotum Lab

video upload by batchas

Thursday, January 11, 2024

Serge demo 20240108

video upload by justin3am

"I did a demonstration with my Serge+friends modular for the LA Synth Club on Monday, January 8 2024. Unfortunately, the multitrack audio didn't record correctly and the audio the camera captured was bad. Also the camera cut out after like ten minutes. :facepalm:
C'est la vie. I'm just glad we had a nice turnout."

Monday, December 18, 2023

Blacet Research 2090 Mini Wave wavetable frac rack modular Grant Richter / Wiard

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

Note auction links are affiliate links. See the site's privacy policy for more info.

"Blacet Research 2090 Mini Wave. Classic wavetable module designed by Grant Richter. Factory build. Cosmetically in excellent condition with a small amount of rack rash. Tested, working exactly as it should."

Saturday, October 14, 2023

4 beats with the Bugbrand Modular Synthesizer

video upload by Modern Fate


video upload by Modern Fate

"All sounds from the Bugbrand modular, additional stereo processing, reverb and mixing in Ableton."

Wednesday, August 30, 2023

New Bugbrand NSH - Noise, Sample & Hold & Red Phase Shifter Modules

via Bugbrand

"NSH stands for Noise, Sample & Hold – a module which features analogue Noise and a pair of Sample & Hold processors.

The Sample & Hold circuits are identical, each with Input, Output & Clock input (with internal comparator, trigger level c.+1V). The Source Input can be set to either an external signal or takes the White Noise source direct. The S&H can be run at audio rates for ‘bug-crushing’ (analogue sample-rate reduction – NOT bit-crushing).

The Noise section is standard transistor-based White Noise, with a second Filtered output which passes through a simple tilt filter around 1kHz cutoff."

via Bugbrand

"The Phase is a 6 pole, analogue Phase Shifter designed for hands-on sonic thickening. Made up of 12 All-Pass Filter stages, it features fully balanced Input/Outputs, Feedback, and Modulation from an internal LFO and/or external sources. All in a very playable design, stemming very much from the blue Phaser module.

Check the Block Diagram image. The main Input is designed for typical line level signals with variable gain up to 20dB and soft-clipping so you can add some overdrive if desired. The Feedback input stage is similar but without the variable gain – it is normalised from the Phase output & plugging a jack plug in breaks this normalisation. The buffered input signal is split off to the Phasing stages and the dry signal also passes on to the output mixer where it mixes with the Phase stage outputs. The Phase stages is also buffered to provide a pure wet output.

The magic of All-Pass Filter stages, here built around three of the ever versatile 2164 quad-VCA chips, is that they alter the phase of signals at their filtering frequency while preserving their amplitude. (With a pure sine-wave, this would look like the waveform being shifted in phase from the input – but you’ll rarely be putting in a pure sine!). When you mix together the dry & processed paths, frequencies cancel each other out to create peaks & troughs in the frequency response. The main Phase control, combined with any modulation, sets the centre frequency for the filtering and covers the whole audio spectrum.

Dialing in Feedback passes the phase-stage output back around to its input (via a normalised jack connection – allowing experimentation with further external processing) which emphasises the filtering up to the edge of resonance. The Add/Subtract switch inverts the phase output & the feedback input to give two different response modes and there is also an internal jumper that allows some subtle behavioural differences by putting the feedback into either the first or second filter stage (set as standard to 2nd stage, down position, but… experiment!).

Static filtering (ie. without modulation) can be used to highlight particular frequencies, but bringing in modulation is perhaps the more readily audible approach – give it some movement! The internal sine-wave Low Frequency Oscillator (LFO) covers traditional sweep modulation (range approx 0.08-10Hz), but more interesting usage can be found with external sources such as sequencers etc. Note that when switched on initially, if the LFO Rate is set low then the oscillations will take some time to build up to full strength, so you may want to turn the control up full until the LED indicator is clearly blinking. The LFO also has a banana output jack (+/-5V). The External Modulation input takes a CV input (typically 10V peak-to-peak) and has a convenient polarity/mute switch. See the Understanding signals & voltages and Interfacing with Bananas pages for further technical details."

Wednesday, August 16, 2023

Lunchbox Voice Prototype gets patched ! - Low-Gain Electronics | 4U Modular

video upload by LowGainElectronics

"Had a shop visit from the talented @helenastndc all the way from Spain/Sweden yesterday! We had a great discussion about synthesizers, design/diy and education. She got a little time to patch on the lunchbox voice system prototype on my test bench. We didn’t get a chance to get a proper recording of it but I fired it up where she left it and grabbed this recording of it this morning. Just turned a couple of knobs during the recording to see what sonic journey it would take! Hope you enjoy! Headphones recommend for full fidelity!"

Sunday, May 28, 2023

Spring tour 2023 pt. 3/4 // Patch Point, Hanse 3 - Dresden, Synthesizers

video upload by Kristoffer Lislegaard

"Studio session at Patch Point and playing live in Dresden"

Wall of Ciat-Lonbarde, Bug Brand & Serge systems.

Sunday, March 12, 2023

Blacet Modular System Fracrack Synthesizer System

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

Additional Tone Tweakers Listings, also on Reverb

"This is a 3 rack set of hard to find pre-assembled Blacet Modular frac rack compatible modules. Fracrack or fractional rack modules were the precursor to eurorack modulars, and some feel they sound better than the euro rack standard. Some of these modules were factory assembled and some were not. There are a couple partially cut wires in the non-factory assembled modules that we will probably remove entirely before shipping. All modules were tested individually in another system and determined to be working properly. Power supply and and rack enclosure are not included. If you need a power supply, please email us as we may be able to provide one for an additional cost.

This sale includes the following:

3 racks

Rack 1:
STG multiples
Blacet Research VCO 2100
Blacet Research Dual Filter 2420
Blacet Research Final Filtre 2030
Blacet Research EG1 2070
Blacet Research Dual Lin VCA 2410

Rack 2:
STG multiples
Blacet Research VCO 2100
Blacet Research Dual Filter 2420
Blacet Research Final Filtre 2030
Blacet Research EG1 2070
Blacet Research Dual Lin VCA 2410

Rack 3:
Blacet Research Stonz 2440
Blacet Research Window Comparator 2700
Blacet Research Dual Filter 2420
Blacet Research Klang Werk 2010
Blacet Research Time Machine 2050

15 frac rack power cables"

Saturday, March 04, 2023

BLACET Frac Synth with 10 Modules and Case

Note: Auction links are affiliate links for which the site may be compensated.
Blacet Research MD2600/2650 Module Tutorial video upload by jblacetIII

From the listing:


This selects three inputs via a control voltage and sends it to the output. Musically interesting, and you can see the YouTube video on how this one's designed."

via this auction

Thursday, March 02, 2023

Vivaldi Four Seasons, AUTUMN, On Analog Synthesizer - Look Mum No Computer

video upload by LOOK MUM NO COMPUTER

"Another #Classical Song done on my DIY #Analog #Synthesizer.
Vivaldi summer made with synthesizer based and built on an arrangement by g.pollen a prolific arranger from the original scores.
you can download wav/mp3 track here on Patreon amongst many others :-"

Wednesday, March 01, 2023

Vivaldi Four Seasons - Spring, On Analog Synthesizer - Look Mum No Computer

video upload by

"Another #Classical Song done on my DIY #Analog #Synthesizer.
Vivaldi summer made with synthesizer based and built on an arrangement by g.pollen a prolific arranger from the original scores.
you can download wav/mp3 track here on Patreon amongst many others :-"

Sunday, February 05, 2023

BugBrand Modular (Lots of Rarities - DRM1X + Scrotum Labs & more)

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"3 Frames of mostly Blues (have rack ears on frame): Scrotum Labs: Tresses (Braids), Radio Music x 2, Orgone Accumulator, Le Seq, Grilles (Grids). Bugs: DRM2, DDSR, diode director, dual divide, DRM1X, LPG & Dual Mixing x 2.

I am optionally including a set of clear acrylic end cheeks (5 frames). If you have a 2 frame synth voice going from Tom, these 3 frames will super charge your modular and you will be making dope beats, etc in no time!"


Switched On Make Synthesizer Evolution Vintage Synthesizers Creating Sound Fundlementals of Synthesizer Programming Kraftwerk

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