SISKworks Cassettone modified tape instrument - Knobcon 2026

video upload by sonicstate

"Mike from SISKworks showed us the Modified Tape Player Prototype, a motor-controlled cassette instrument developed from his earlier "poor man's Mellotron" idea.

He explained that the original version uses one continuous tape loop with a constant tone. Five buttons trigger playback, and each button has a knob that tunes motor speed for a different pitch. The newer prototype keeps that five-key approach and adds a Daisy microprocessor for delay, reverb, filter, harmonizer and reverse grain effects.

The control knobs adjust the last effect engaged, and the filter can self-oscillate slightly. The unit also includes a step sequencer with normal, reverse, bounce and random directions. Steps can be switched on or off, and tempo, length, glide and swing are adjustable. A hold mode latches the last key for drone use.

The prototype includes gate, CV and clock inputs, and it is planned for 1V/oct tuning. It can use tape loops or full-length cassettes, but it does not record to tape. Pricing is not set, and the final version is likely to be desktop rather than Eurorack.

A lovely collection of hand made custom sound devices here:
https://www.siskworks.com/
https://www.etsy.com/shop/SISKworks"

VAV N-Wave: Middle-Out Waveshaper

video upload by Magical Synth Adventure

"Join me as I take the @control_voltage VAV N-Wave Middle-Out Waveshaper for a spin!

The N-Wave is a really imaginative waveshaper. Some waveshapers might fold over the peaks of an incoming waveform, some might rectify them - squaring things off like a fuzz pedal. N-wave keeps the peaks of waveform - like the top and bottom of a saw wave - intact, and instead lets you shape and turn up on the volume on a section in the middle of the waveform - leading to unique tones. This is especially true, as you can vary the width of this middle section!"

video uploads by control_voltage

Playlist:

1. VAV N-Wave: Step Sequenced Threshold

One fun live performance (or studio) use for the N-Wave is to connect a Step Sequencer on the Threshold CV and generate different timbres for each step in a sequence. These act as accents and add a lot of life and feel to your sequences and the feel can easily be changed on the fly using something like a Joranalogue Step 8 as your source of steps.

2. VAV N-Wave: Threshold Ring Modulation

In Part 2 of the VAV N-Wave Video Manual, we look at using the threshold control and bipolar vca cv to create new waveforms that have a mixture of normal and ring modulated (quadrature) segments.

3. VAV N-Wave Mangles a Triangle

Here, the N-Wave does quite a number on an unsuspecting triangle wave with the help of some nearby modules. N-Wave is kind of like that one kid's house where everyone hung out and cooked up weird DnD campaigns or something. But for modular signals.

"N-Wave is a novel waveshaper for the Eurorack modular format. Unlike traditional wavefolders and clippers, which operate on the peaks of a waveform, N-Wave leaves peaks intact. All you need to expand your sound palette greatly is a VCO signal and a few twists of the knobs!

Using its internal bipolar VCA (aka four quadrant multiplier, aaka ring modulator) you can apply gain reduction and polarity inversion to an inner portion of the wave slope that you define with the THRESHOLD and OFFSET controls.

All functions can also be controlled via control voltage inputs. LFOs, Audio Rate VCOs, ADSR Envelopes, 1V/Oct signals, sequenced voltages, sample and hold signals, noise, and sub octave signals are all very good choices and can produce results ranging from very musical to very strange. An external detector signal can also be applied if you don't want to trigger the detector on the waveform you're modifying.

If you like, you can also use N-Wave as a high quality bipolar VCA, attenuverter, or ring modulator with the THRESHOLD set to maximum and dynamically mute the effect by applying 0V or a negative voltage to the threshold either using a sequencer or manual control, which allows for hocketing and rhythmic effects.

N-Wave can also operate all the way down to 0hz (DC), so, in addition to audio, it can process LFOs, envelopes, 1V/octave sequences, and any other signal that varies amplitude over time (Sorry, square waves and pulse waves. Your super-sonic rise times are hard to shape in an audible way, but you do work well as control signals).

N-Wave is 10HP and uses Burr Brown op amps for the primary signal path alongside high quality Texas Instruments ICs that are carefully chosen to best fit their roles in the circuit."

Shakmat Lancer's Lash Snare Module Review

video upload by Molten Music Technology

"Lancer's Lash is all sorts of snare with all sorts of variation and hands-on control."

Index: Intro - 0:00 Overview - 4:48 Analog Model - 7:22 Slap Model - 8:41 Modal Model - 10:33 Physical Modelling Model - 12:15 FM Model - 13:45 Grains Model - 14:44 Blend Model - 17:14 Randomization - 20:23 Pitch 1V/Oct - 25:27 Other Settings - 29:07 Conclusions - 29:59

Shakmat's Lancer's Lash Charges into Battle

video upload by Metamyther

"We take an in-depth look at Shakmat's Lancer's Lash, exploring how this powerful snare module creates everything from tight techno snaps to industrial percussion to glitchy IDM rhythms. I'll demonstrate the module's sound engine, modulation possibilities, tone shaping controls, and how it plays with other effects modules. Whether you're building a modular drum machine or producing industrial techno, EBM, IDM, or experimental electronic music, this review breaks down whether Lancer's Lash deserves a place in your rack."

phase fiasco eurorack modules

via phase fiasco

Skalman

240dl

[i]

meteor shower

CLICK FOR MORE »

7555VCO 1

video upload by cirtcele

"Wide ranging sawtooth VCO with the hardest hard sync around."



via nonlinearcircuits

"Not the most exciting name, I simply wanted a 4HP sawtooth VCO to sit next to the Spectrum Shaper.

It is based on the Utility VCO in Electronotes EN67, which was based on designs by R. Tenny (Electronic Design 11/10/75), J.L. Brice (Wireless World (6/76) and others.

It tracks very nicely, turn the CV pot to max for 1V/oct, ranges from approx 10Hz to over 100kHz and supplies 10Vp-p sawtooth and square waves.

The Sync is the hardest of hard syncs around. I left out the capacitor usually used to turn sync signals into a pulse, so if you feed a gate or slow CV signal into Sync the VCO simply stops, think of it is a bonus VCA. Of course, if you use an audio rate sync signal, it works as normal.

It is a pretty easy build. not many parts. Do not mix up the BCM847 and BCM857 dual transistors, see the build notes for where to install a 1k tempco."

Meet OBSIDIAN by Vannes Devices

video upload by VannesDevices

"Jamming with the 303 sequencer and OBSIDIAN, just having fun!
#synthesizer #303 #roland #sequencer #obsidian"

OBSIDIAN - Short Demo's

Via Vannes Devices OBSIDIAN.

Forged from fast-cooling lava, this volcanic stone becomes a black mirror that, when used with purpose, awakens and channels your creative energy.

OBSIDIAN is a unique semi-modular analog synthesizer with its own characteristic sound. Its analog circuitry combines different worlds of synthesis techniques, opening space for creative sound design and composition.

Inside OBSIDIAN.

Oscillators
West-coast style oscillator section.
Waveshaper, wavefolder and cross-modulation.
1V/oct tracking across eight octaves.
Sub-oscillator for thick foundations.

Voltage Controlled Filter
Two-channel mixer with optional external inputs.
Multi-mode: low-pass, high-pass and band-pass.
Continuous modulation between filter modes.
Voltage controlled mode, cutoff and resonance (peak).
Bipolar envelope modulation.
Voltage controlled amplifier with CV inputs.

Voltage Controlled Envelope Generators
ADSR envelope.
AD(R) envelope.
Gate and velocity input per envelope.
Voltage controlled slew rates and levels.
Inverted output.

LFO · Delay
LFO
Saw, ramp, sine, pulse and random outputs.
Frequency range from 0.01 Hz up to 100 Hz.
Clock syncable to tap tempo, external (eurorack) clock and MIDI clock.
Rhythmical clock divisions (¼, ⅓, ½, ¾, 1/16).
TAPE-STYLE DIGITAL DELAY
Voltage controlled time and feedback.
Clock syncable to tap tempo, external (eurorack) clock and MIDI clock.
Rhythmical clock divisions (¼, ⅓, ½, ¾, 1/16).

Sequencer
West-coast style five-step sequencer.
Selectable 4 or 5 step sequence.
External and manual sequence reset.
Clock syncable to tap tempo, external (eurorack) clock and MIDI clock.
Patchable to oscillators, filter and any CV destination.

GEMINI 2412 Dual SEM VCF Sequencer Tweaking #eurorack

video upload by AJH Synth Official

"Some 70's-inspired tweaking with the GEMINI 2412, SAMPLE & Hold, and a Sequencer.
Video & Performance by ‪@DreamsOfWires‬
The Gemini is based on the classic Oberheim SEM filter, but with expansive flexibility, including a unifying CV and Audio mixer section between the two multi-mode VCFs. There is a shared output for both filters in 'Dual' mode as used here, but also separate shared outputs for each VCF, through which filter mode can be selected, and individual outputs for LP, BP and HP filters on each.
Also, a jumper on the back alters the behaviour of both filters individually - standard SEM resonance range, or extended high resonance setting that'll allow the filter to self-oscillate. 1V/Oct inputs are present for both filters, so each can even be used as a simple sine wave oscillator over a few octaves.

AJH Synth Eurorack modules used:
Vintage Transistor Core VCO
Gemini 2412 Dual State Variable Filters
Discrete Cascaded VCA
Dual LFO + VCA
SAMPLE HOLD + SLEW
RING SM (Moog CP3 mixer/sub bass generator/ring modulator)
DH-ADSR (looping envelope generator)

Other gear:
‪@vermonagear‬ DSR-3 Stereo Spring Reverb
‪@solidstatelogic‬ BigSix Mixer & Audio Interface
Eurorack Case by @Casa_Modular_ (Instagram, Reverb, Etsy)
Case Power by ‪@konstantlab2976‬

#modularsynth #synth"

Stupidly useful, simple & small // Low Fat VCF from AJH Synth

video upload by DivKid

"Here's a fun one and something stupidly simple, really easy to use, small, affordable but way more useful than you might think. It's the Low Fat VCF from AJH Synth, which is a 2HP non resonant (it's supppppeeeer smooth) high pass filter.

I think my favourite thing is using it to pair with low pass filters and to make a variable width band pass filter. It's also nice as a simple "clean up the mix" tool, as a pseudo spectral sidechain, multiband ducking style device or just for performance sweeping low end out of things."

"The Low Fat filter packs a switchable 6dB and 12dB slope High Pass Voltage controlled Filter into a miniscule 2HP of rack space, with a very low power consumption of less than 12mA per rail.

Sometimes there is just too much bottom end in a patch and it swamps everything else, by feeding it through the Low Fat Filter we can remove some of this bottom end to balance things up.

It also makes a great companion to the MiniMod Transistor Ladder Filter and can be placed before or after this in a patch to create a Band Pass filter with a variable passband and a choice of a softly rolling 6dB slope or a stronger 12 dB slope.

It's a great way to populate one of those frustrating gaps in your eurorack modular case with something that is deceptively usefuI.

In Depth

The LOW FAT is a new 2hp Eurorack module by AJH Synth, it's a High Pass filter, with frequency control by either manual pot, and/or external CV with attenuator. It's intended to compliment other filters, particularly low pass VCF modules, in practical tasks such as removing excessive low frequencies, for example when the bass is swamping a mix. It can be switched between 6dB (1 pole) response and 12dB (2 pole) response.

By patching a CV signal to the FCV input it can be voltage-controlled and used musically as with any other VCF. When used in conjunction with a LP filter it forms a fully customisable band pass filter, allowing the range of passbands to be cherry-picked. Feeding in a 1V/Oct pitch CV and setting the FCV pot to a suitable level allows it to track an incoming pitch CV, so the amount of High Pass filtering remains constant as the pitch of the incoming VCOs traverse up and down the frequency range. This can be particularly useful in creating percussive sounds, such as snares and hats, but also on sequenced bass lines. Since it is only 2HP it's a great way to occupy one of those frustrating gaps in your eurorack modular case with something that is deceptively useful, and adds another dimension to the classic bass monster that is the Transistor Ladder Filter."

Kenton USB Solo mk2 MIDI to control voltage review + Big Merp Cameo 😺

video upload by CatSynth TV

00:00 Introduction
00:18 Overview
00:55 MIDI-to-CV demo with note, control change, and aftertouch messages
06:49 Saving configurations as presets
07:42 Converting MIDI clock to CV for synchronization
09:45 Conclusion

"In today's demo and tutorial, we have a bit of fun with the new USB Solo mk2 from our friends at Kenton Electronics. The handy little gadget builds on Kenton's previous MIDI to CV converters, and allows one to convert MIDI from USB or 5-pin DIN to a variety of CV signals, including pitch (1V/Oct), gate and trigger, 3 aux channels for CC, velocity, aftertouch, and more. It also supports MIDI clock, allowing one to synchronize Eurorack and other analog synthesizers with your DAW or MIDI sequencer. Additional features include a built-in LFO and envelope.

Big Merp decided he wanted to be a part of this demo, too 😺"

Patreon: / catsynth | https://shop.catsynth.com | https://ko-fi.com/catsynth

introducing splines

video upload by Þ

"A first tour of the new splines eurorack module by thorn.audio out now.
For more information please visit the manual page at:
://thorn.audio/splines"

This one was sent my way via Meska.

"Splines is a visual vector curve generator in Eurorack format, with a wide frequency range and a built in quantizer, cv scope and cv processing capability.

It can be used in ways similar to a wavetable VCO, LFO, step sequencer or envelope generator.

Onboard quantizer scales, backups and firmware updates are managed as you would use an external USB drive.

It’s a small, shallow, multifaceted addition to any setup, and for touring rigs it can fill many roles in exchange for little space and weight.

in depth.
In the technical sense "splines" are most commonly used in 3d modelling, animation and vector graphics. It's essentially just a way of creating a curved path from one point to another.

In this module, you have up to sixteen user configurable points or nodes which function much like a step sequencer, where the X axis represents time and the Y axis represents voltage.

When the phase(time) reaches the X position of a node, the 1v/oct output changes to the Y position value of that node.

Each of the sixteen nodes also has a configurable trigger setting, determining if the gate output goes high when the phase crosses the X position of the node.

The nodes are connected by a spline and the shape of this spline is determined by three parameters; Tension, Continuity and Bias. The spline output gives you a voltage following this curve.

Tension changes how extreme the curve between the nodes is.

Continuity sets the angle of the spline at the node.

CLICK FOR MORE »

BUCHLA Ziggy Sound DEMO & Walkthrough — Superbooth 2026

video upload by Hispasonic

"At Superbooth 2026, Buchla unveils Ziggy: their most portable and accessible analog desktop synthesizer to date. Filmed at the Buchla booth in Berlin, this video walks through the instrument's main features and includes a full sound demo.

Ziggy distills the DNA of classic Buchla instruments into a compact, immediately playable format: complex oscillator, modulation oscillator, Cycler (envelope + pulser, à la 208c), lowpass gate and a stereo digital effects section with a brand-new ping pong delay. All modulation routing — normally done with patch cables on a Buchla — is handled through flexible assignments from the panel and the oscilloscope screen.

KEY FEATURES
Fully analog signal path + digital stereo effects True analog bypass (voltage divider) when dry is at zero "Programs" designed as a starting point, not as closed presets Fader quantization to scales (pentatonic minor, etc.) Oscilloscope screen doubles as the programming and mod-assignment display

CONNECTIVITY
USB-C (power + MIDI) plus a second USB-C dedicated to power 3.5 mm TRS Type A MIDI and 5-pin DIN MIDI
Eurorack patch points: gate, modulation, pressure and 1V/oct
Aux audio input and stereo outputs

PRICE AND AVAILABILITY
$999 street price. Available for pre-order, first units expected late summer / early fall 2026"

Get lost in Sound Effects with Nyquist Nightmare

video upload by Robots Are Red

"Nyquist Nightmare by Modular 4 the Masses
12hp Wacky FM Synthesizer designed to emulate the sounds of scanning radio frequencies and more!"

Modular for the Masses

Nyquist Nightmare

Audio Mangling Modulator/Demodulator

This module is a modulator/demodulator. The top four knobs interact with each other to take a signal and mangle it beyond all recognition, or if you're patient and lucky, let the signal come through mostly unchanged.

What is going on there? you ask. The input is used to frequency-modulate a VCO that can oscillate beyond anybody's hearing range. The resulting (possibly ultrasonic) signal frequency-modulates a second identical VCO. This leads to the kind of signal degradation you might expect from an AM radio transmission. Or a short wave signal fighting its way through a hurricane.

The rest of the knobs control filtering; high-pass to remove the truly ground-shaking rumbles the top for knobs can generate, and resonant low-pass to get the harsh high pitches out of the signal, and emphasize (for example) the frequency range of human speech, if you want to pass old movie dialogue through this.

Also included are a wet/dry control (while prototyping this module I would sometimes spend minutes looking for the perfect knob settings to allow a signal through just to realize the signal source had stopped playing), a CV input for the low-pass filter with an attenuator knob, and a effect volume knob.

Some fun things to try:

with zero input, try to get a modem sound!
connect a simple waveform and massage the top four knobs to fold the wave in surprising ways
David Lynch. Put David Lynch through this.
turn the resonance of the low-pass VCF up and use this as a VCO (not 1V/oct, I'm afraid
Turn both "Carrier" knobs all the way down, so the VCOs are stalled, and listen to the signal bash its way through

http://hivemindsynthesis.com/m4tm

Analogue Solutions Colossus AS100 Classic

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

via this Reverb listing

Additional CONTROL Listings

"Fully tested. Includes brand new set of Black 0 Ohm pins and Red 10k Ohm Pins. Shipping rates are arbitrarily set. Email or message us for crated rates, LTL shipping rates, and alternative payment methods. Dimensions of this are 62.4" W x 27" D x 25.79" H before being crated.

Some notes for this unit:

There is a panel dent in the back, above the power inlet and audio outputs.

There is a panel dent to the left side of the CV Matrix.

There is a small blemish on the right wooden end cheek.

There is a small dent on the left wooden end cheek.

There is a small blemish on the back left top wooden lid.

VCOs are calibrated for the Touch Sequencer and will need recalibration for external 1V/Oct use."

CLICK FOR MORE »

Orpho CV Note Looper – Calibration Mode Explained

video upload by HOX808

"This video shows how to calibrate the Orpho CV Note Looper for accurate pitch tracking across multiple octaves.

Learn how to enter Calibration Mode, adjust tuning and octave tracking, and match the module to an analog oscillator using the 1V/Oct standard. For this demonstration, a Behringer 921 VCO is used, along with a tuner for precise adjustment.

Calibration helps compensate for small variations in modular systems and ensures that all notes stay in tune over the full range.

For more information and to download the full manual, visit:
👉 www.orpho.de"

Orpho CV Note Looper – Quantizing 32-Step CV Recorder and Sequencer for Eurorack

video upload by HOX808

"CV Note Looper is a quantizing 32-step 1V/Oct CV recorder for Eurorack, built for flexible melodic sequencing and hands-on control. Create anything from short looping phrases to full 32-step patterns, shape them with selectable scales and root notes, and keep everything locked into a musical flow. This video shows the module in action, including pattern recording, playback, scale setup, and calibration."

https://www.orpho.de/

BugBrand Frequency Shifter

via BugBrand

"The Frequency Shifter (red) is a powerful and experimental analogue processor. This standalone design springs from my Quadrature Sine and its Frequency Shifter Expander modular designs – all wrapped up with circuitry & features to allow it to fit snugly into more regular studio processing roles.It will transform your audio streams in otherworldly ways – clangorous, tonal, phased, stereofication and swoosh.

CLICK FOR MORE »

Yuyo cmos synth - First try Attiny85 dco with analog cmos shaping and twin t filter

video upload by JIANT

"everything is from the synth to the zoom recorder, twin t drums, xor snare, pt2399, and cmos stuff.

attiny85 reseting the phase of 40106 oscilators, the digital control accepts 1voct from keysetp and go to the 40106 inputs through resistors, a little rc for filtering the pwm, and for this reason when you change the oscillator frequency you can get intervals and crazy stuff. is not orthodox but suits my need for Rich timbres. the dco goes to 40106 buffers , and then 4040 dividers, twin t filters, one for each of the two voices, one goes to env, vca, filter, delay, and the other one to clock divider and filter, to get the sub osc.

firmware super simple only for checking the conversion from filtered frecuency of the attiny85 to my 40106 non exponencial vcos.
currently is tracking 10 octaves really good, the trick is put a voltage divider in the cv in of the attiny because keystep has 0 to 10v and the attiny accepts 0 to 5v tehn the tracking inside the attiny converts o.5v oct to 1 volt oct. i dont know anything about coding but i made it with chat gpt and my design . source code will be in the coments ."

Previous videos:

CLICK FOR MORE »

Scale Snap - Eurorack Random Note CV Sequencer

video upload by HOX808

"Scale Snap generates random but scale-accurate note patterns of up to 16 steps. You choose the key/scale, root note, number of steps, and how “jumpy” the pattern feels. It also includes a chord/'Strainer' mode that locks notes to triad tones (random-only, ascending, or descending).

Connections include clock in, 1V/Oct CV out (0–5V), reset to step 1, and a random trigger/button. Controls let you set root, select from multiple scales (chromatic, major, minor modes, pentatonics, etc.), and adjust a parameter that switches between probability of change, octave range, and step count. The display shows step progress, current parameter values, root/scale name, and a scale grid with the active note highlighted."

Huge Modern Modular Filter Tones & Techniques // 3 Patches for Ceremony & Sigil from Nekyia Circuits

video upload by DivKid

"Here we have a 3 Patches series video with the character oozing CEREMONY, a low pass morphing to twin peak band pass filter packed with modern features and lots of CV options and SIGIL a compact function generator for envelopes, LFOs, slews or other function generator tricks! Check out the patches and skip around below."

"If you'd like to support work like this and the wider range of what I do, considering heading over to Patreon at https://bit.ly/DK-patreon and supporting for as little as $1 a month to gain access to the DivKid Discord community, plus lots of exclusives such as PDF patchbooks, videos and more. https://bit.ly/DK-patreon"

*TIMING INDEX // CHAPTERS*

NOTE // sub bullet points are points of interest within each section/patch, for those that might be looking for a specific detail to skip back to.

INTRO

00:00 Hello & previews

01:16 Sigil feature run down (function generator)

CLICK FOR MORE »

SWITCHTRIX ELECTRONICS KS SEQUENCER WITH INTERFACE/ARP ODYSSEY

video upload by SWITCHTRIX ELECTRONICS

"Our recreation of the classic KS sequencer using the output interface to connect to an ARP ODYSSEY.

This allows the KS to connect to 1V/oct synths or MK1 EMS Synthi/VCS3

For more info contact

mail@switchtrix.co.uk"

Red version in previous posts here.