-Voltage Controlled Oscillator based on AS3340 with sawtooth, triangle and pulse waveforms -Voltage Controlled Filter with lowpass and highpass options, Drive control, Sweep control which attenuates amount of Release CV -Release generator with CV input for voltage control of release time. Option for sustain via jumper on rear panel. -Voltage Controlled Amplifier
Together they form a pre-patched super versatile analogue synthesiser voice.
Additionally, each section is fully modular in it’s own right, so there are patch points for:
-1V/oct CV input -PWM CV input – attenuator doubles as manual pulse width when no external signal is present -Gate input for Release or Sustain/Release -Release CV input for voltage control of Release time -VCF audio input with attenuator, for introducing external audio -VCF CV input with attenuator (1V/oct CV is normalised to this input) -VCA audio input (VCF is normalised to this input) -VCA CV input (Release CV is normalised to this input) -Release CV output -VCO audio output -VCF audio output -VCA audio output"
"101-VCO Version 2 Roland SH-101 Oscillator Adaptation + RD-6 [Demo 1 No Talk]
Audio + Video by G-Storm Electro c. 2023
101-VCO has returned to the fold: the same great sound, simplified and improved tuning, and having all the individual outputs without need for an expander module. All in 12HP Headphones or good monitors recommended.
Check my Reverb store for 101-VCO availability.
Oscillator | GSE 101-VCO Filter | GSE JU60-VCF VCA | GSE 2xVCA LFO | Feedback LFO10 Output | Pittsburgh Outs Drum Machine (off camera) | Behringer RD-6 Recorded direct, no other mastering or effects.
"The 101-VCO has been re-tooled in 12HP! Version 2 continues its authentic realization of the Roland SH-101 Oscillator adapted to Eurorack: that lovely Sub-Octave Generator, that snowy Noise Generator, an integrated Mixer section to bring all the waves together.
Now in revision 2: Improved tuning stability using power rail voltage references. Simplified tuning via coarse/fine tune knobs. Individual waveform outputs without need for any expander module.
101-VCO expands the original SH-101 features to reveal more potential of the 3340 chip: Triangle wave and exponential FM. And 2 flavors of Linear FM: Lo Range to find those vibrato sweet spots, and Hi Range for full-on Linear FM madness. Expand the palette of original sounds using an external CV signal for Pulse Width Modulation that is summed against the initial Pulse Width amount. While the initial PW amount can go right up to the edge of vanishing, PWM can take the Width right down to 0% up to 100% for complete cancellation.
Great care was taken to keep the 101-VCO fully analog circuit as close to the original as possible. Featuring an Alfa AS3340 re-issue chip at the core of the design, surrounded by eight 20mm slide pot controls. With the conventional coarse/fine tuning knobs it will provide full audio range, whether using the v/oct input or not.
Every 101-VCO is meticulously hand-crafted in limited quantities, not mass-produced, and ready to rock your modular world. Includes 16-pin-to-10-pin power connector cable.
Coarse Tune Knob | Initial oscillator frequency
Fine Tune Knob | Initial oscillator frequency, +/-6 semitones range
FM Slider | Amount that an external signal will modulate the frequency
FM TYPE Switch | LO for vibrato, HI/EXP for more dramatic frequency modulation
PULSE WIDTH Slider | initial Pulse Width amount
PULSE WIDTH MODULATION Slider | The amount that an external signal will affect pulse width
SOURCE MIXER Sliders | Adjusts the amplitude amount of each waveform going to the MIX output
"The Covid Kid is back with his 90th video, 30 minutes in length(!), and 3rd round of Covid. I seem to only find time to make videos when I have some downtime due to Covid. Please excuse my flagging voice.
00:10 start of Audio Demos 07:39 start of Technical Overview and Features 08:07 AS3340 & AS3345 chips 08:20 What the 2AT isn't: not e-series and not based upon Buchla designs 09:38 The 4 main sections of the module 09:53 Common Control (Master Pitch in and offset knob) 10:33 Mix Out section with optical clipping 11:22 LFO Swarm based upon their Electric Dompteur h-seriers 1/2 space module. Genius! 13:35 LFO Swarm waveforms 14:15 the weird LFO shapes 15:05 8 octave range with rotary switch 16:08 mixer per oscillator 16:28 3 varieties of sub-octaves 17:39 FM normalling and routing 18:16 0-10V properly biased modulation outs on banana jacks 18:50 scoping out the modulation outs 19:50 shorting bars 20:00 listening to the various forms of oscillator sync 23:30 FM showcase. How it sounds and how the routing works. 28:00 3 Operator FM with 223e arpeggiator 29:21 Adding clocked LFOs and VCA mixing 30:14 fini!
The 2AT is an incredibly feature rich module: It tracks over 8 octaves 3 oscillators with four waveforms each. Each waveform has an individual mix level control via knob and banana jack Rotary switch for selecting the octaves 3-stage sub oscillator Selectable Waveforum Mod CV (0-10V) out Scalable FM and CV control Full PWM control Attenuverters wisely employed where they make sense FM inputs normalled to the outputs of anther oscillator and the routing can be changed on the back Sync I/O via shorting bars Each oscillator's waveform outputs are mixed internally and are present at the MIX OUT if no single out is used Optical clipping stages are present at each OSC, and again at the Mix Out stage
Clocked or Free-Running Swarm LFO The 8 frequencies (the 8 outputs) can be offset in phase or frequency, always based on the master frequency. It can go down to 0 Hz and freeze the levels at their present state Each output has its own attenuator
It’s feature rich! (12 VCAs, syncable & offset-capable LFOs of various waveforms, 4 optical clippers: 3 x each osc and one on Mix Out, 3 sub-oscillators, multi-waveform oscillator sync, and so much more.)
It’s the Northern Light Modular Model 2AT Animated Tricillator. https://northernlightmodular.com/prod...
This thing is nuts but also very well thought out. The master stroke is adding their Electric Dompteur H-Series module ( https://northernlightmodular.com/prod... )right on board. With so many modulation destinations, it makes perfect sense to add 8 syncable, freezable, offset-capable, and multi-waveform LFOs to complete the package and animate the entire show. Each LFO output also features its own attenuator, thus providing subtle movement as heard in this video.
I’m planning to do a full walkthrough of the module as soon as time allows."
The oscillators are built on the classic circuit used in the 80s by Roland, Sequential and others. The new AS3340-HYP VCOs give us that silky smooth 80s feeling back again and take care of the pitch drift the classic CEM shows It tracks fine over all 8 octaves.. All four waveform levels are CV controllable There is a rotary switch for selecting the octaves, a 3-stage sub oscillator and a front panel jumper selectable Mod CV (0-10V) out , scalable FM and CV control and of course full PWM control , all attenuverted The 2AT has the FM inputs normalled to the outputs of the other oscillators and the order can be changed on the back The sync inputs can be connected with shorting bars to the adjacent mod outputs conveniently The 3 separate oscillator outputs are mixed internally and are preset at the MIX OUT if no single out is used. Optical clipping stages are present at OSC and MAIN stage
The left side of the module is a swarm LFO One master frequency, set by a knob or an external input, is re-used 7 times with variations The 8 frequencies can be offset in phase or frequency, always based on the master frequency. It can go down to 0 Hz and freeze the levels at their present state And every output can be adjusted directly at the output without the need for attenuators
There is also a shared pitch input with a 4 octave offset and level LED on the lower left side. The upper left corner is the collective clipping and gain control.
8 linked true zero LFOs Sine, triangle, rising and falling ramps , square , pulsing and frozen random available
V2 offers new Midi clock sync multipliers and a MCU controlled phase/spread button
Offset in phase up to 180 degree Offset in spread based on sub harmonics of the master frequency Frequency range from 0 to 300 hz 8 Outputs can be adjusted from 0-10V individually Cv controlled frequency up to 2x and down to 0hz
The h series modules require a h bracket to be mounted in a 1U space
"A little video demonstrating the Ion, a digitally controlled analog monosynth that I built a while ago. All the music in the video was created using the synth only (sequenced from and recorded into Ableton Live).
I started sketching the concept for the synth nearly 10 years before I began the build, but had a great deal to learn about analog and digital electronics before I was capable of actually building it. I arrived at the final design around mid-2020, began the build late 2020, and completed it a few months into 2021.
The synth is controlled by MIDI over USB. I used a PJRC Teensy 3.1 microcontroller and several DAC ICs to generate control voltages.
The Ion has 3 VCOs, each producing a slightly different selection of waveforms, and a noise source with its own state variable filter. Each VCO can produce a pulse width waveform, and each has a dedicated LFO to control PWM. There are two main resonant VC filters, each with continuously variable responses between LPF, HPF, BPF and notch. The filter configuration can be continuously faded between series and parallel.
The synth has a main VCA with dedicated envelope generator, and each VCF has a dedicated EG controlling cutoff frequency. A dedicated LFO can control the frequency of one or all three VCOs. Three other modulation sources, an EG and two LFOs, can be routed through the modulation matrix, a two channel matrix with 7 sources and 8 destinations available on each channel. Each VCO output can be also used as a mod source, as can the noise source. The matrix destinations include VCO pitch, VCF cutoffs, and AM of one of the VCOs and the main VCA.
The synth uses a Doepfer DIY synth board, which provides one of the VCOs, one of the VCFs and its envelope generator, the main VCA, the pitch modulation LFO, and the slew limiter used for the glide control. All the remaining modules are either completely discrete or make use of dedicated synth chips.
The design of VCO1 is adapted from Thomas Henry's astoundingly good VCO-1. The second VCF derives from Thomas Henry's beautiful VCF-1 design. VCO2 uses the AS3340 clone of the classic CEM chip. One of the mod source LFOs is based on a very elegant Ray Wilson design, and the other mod source LFO and envelope generator (as well as the main EG and the EG modulating the other VCF) are build using the fantastic modulation chips designed and supplied by Electric Druid. The noise source is also based on the Electric Druid noise generator IC.
In practice, the synth architecture is predominantly subtractive, but the mod matrix means it's also possible to do basic FM, although that's fairly limited by there being only two mod matrix channels (mod matrices are difficult and expensive to implement).
The synth cost about 5 months of spare time, more money than I have the courage to calculate, and some intense stress and frustration in getting it to work properly. Debugging hardware is much more difficult than debugging software.
It was an amazing journey of learning, and I'm one step closer to knowing how not to build a synth. It also gave me an even more acute and humbling appreciation of just how astounding is the work done by the synth electronics pioneers, and indeed contemporary designers. I stand, diminutive, on the shoulders of many giants.
"In this video I discuss a new design for a full analog polyphonic synthesizer. It will have voice cards with all important components on it and should be easy to scale."
Specs of the voice card:
- AS3372E for VCF, VCA and waveform mixer
- AS3340 as VCO
- AS3310 as ADSR
Specs of the mainboard:
- Holds 6 voice cards
- Microcontroller for voice control and MIDI input
- i2c DACs/ADCs/demultiplexer for parameter/pitch control
- Control and user input
"Everything is analog (except the FX) and built by me from scratch.
0:00 - Intro
0:10 - Sync Lead
0:47 - Ambient Pad
1:22 - Bass
1:48 - FM Bells & Noises
2:35 - SuperSaw
3:14 - LFO-Octave Bass
3:42 - Triangle Lead
4:18 - Lasers, Kicks, Snares
4:55 - Weird noises
5:42 - Walktrough of features
9:45 - Pictures"
Some additional details from the comments:
On parts: "My best estimate is around $180 USD, ~70 of which was the Keystep that I used for the keyboard."
On design:
"I built everything myself, but took inspiration from exsisting schematics. The filter is based on Mortiz Kleins vactrol VCF, the envelopes are based on Thomas Henrys 555 envelope and the VCOs are built around the AS3340 chip!
The effects are the only part I didn't build myself, Search for 'dsp 100 reverb' on aliexpress!"
Homemade analog Synth-Guitar!
0:00 Bass sound
0:50 Saw Lead
2:18 Ambient Lead
3:07 "Guitar" Lead
4:04 Walkthrough
"Fully analog, fully homemade guitar-synth
Built from scratch, based on a few different schematics aswell as a few own designs for some of the functions.
The pitch is controlled by two soft-pots tuned a 4th apart, just like a guitar.
The body is mostly made of stained plywood and the knobs are made of dowels that i cut and sanded to size!
The synth is accompanied by a couple of beats I made on my digitakt!
1. How to use the Self Tuning Eurorack VCO Synthesizer
2. The Worlds First Self-Tuning Eurorack VCO (Demo & How To Use)
3. Blinding Lights - The Weeknd (DIY Modular Synth Performance) | DUSKWORK
4. Do I Wanna Know - Arctic Monkeys (DIY Modular Synth Performance) | DUSKWORK
5. Take On Me - Aha (DIY Modular Synth Performance) | DUSKWORK
New maker. This is the first post to feature Dustwork.
"This listing is for the kit version of the Self-Tuning VCO module. It includes a PCB & panel – the panel is made from a strong and ethical material at a 1.6mm thickness; the same as the PCB. The PCB is populated with all SMT components apart from the AS3340. You can find a bit more about what’s involved in the build guide down below"
"!!! available at syntaxis.com.pl !!!
Last time I showed some sounds from Syntaxis micromodules system. Now it's time for more musical demonstration. Very old and overused track, but it's great for presenting capabilities of our synth.
Every sound, except drums comes from synth in the same configuration as in the second demo from my channel."
"micromodular starter kit
This is a set of components for building a basic but complete analog synthesizer on a breadboard. Although it might not have professional look, you will be surprised with its professional sound.
The kit includes:
μPSU·112·A power supply unit
μVCO·3340·A micromodule
μVCF·3320·LP4·A micromodule
μVCA·3360·LIN·A micromodule
μADSR·3310·A micromodule
μLFO·3340·A micromodule
a breadboard, 3x3 units (3 x EIC-16020, 6 x EIC-16010), E.I.C, Taiwan
jumper wires 340 pcs, Wisher, Taiwan
20 potentiometers B10k(*), Alpha, Taiwan
rotary switch, 3 positions, Alpha, Taiwan (VCO wave selection)
rotary switch, 4 positions, Alpha, Taiwan (LFO wave selection)
3 breadboard connectable 3.5mm jack mono sockets
6 connection wires (power connection)
laptop charger, 20V, 3A with 2.5/5.5 plug
2.5/5.5 DC socket with spring contacts
connection diagram
"Hello all.
today I patched WFM oscillator from LA67 and Rebach VCO-A, VCF-A ADSR. I added a traingle wave to FM IN in WFM and pulse waves from WFM to PWM IN in VCO rebach.
as you can see nice nice analog sound when i open more and close the filter.
This is a nice combination for me because the WFM is based on the old 1970 KOBOL oscillator and the rebate VCO based on the AS3340 so it gives a great character,
I tried to subtly add FM and open the filter for a musically working sound."
"!!! Available immediatelly at http://syntaxis.com.pl !!!
Today I have something very special to show. In this video you can see and hear synth made from Syntaxis Micromodular set. Instrument is assembled from basic set of micromodules (uVCO, uVCF, uVCA, uLFO and uADSR), but it sounds quite versatile. User is able to assemble synthesizer on it's own, in modular way, but much cheaper and without necessity of use dedicated multipliers - breadboard does it already! Usually building subassemblies of synths on breadboard makes circuit unreliable in longer term. But with Micromodules it works like it was soldered together - you can assemble you own synth, get plywood, drill holes for potentiometers, screw them in place and carry your own synth around for gigs."
"This is a set of components for building a basic but complete analog synthesizer on a breadboard. Although it might not have professional look, you will be surprised with its professional sound.
"An analog, triangle core voltage controlled oscillator based around CEM3340/AS3340 VCO chip. Available as PCB/panel set. The single row case used in the video was made by NONO: http://nonomodular.com"
PRICE (excludes shipping):
PCB set: 30€
matte black panel: 10€ (aluminium panels will be available later this spring)
Please order via e-mail: info@doboz.audio
"Here's a project that I've been working on for a long time now. It has two AS3340 based VCOs, outputting either ramp or square wavefroms that can be mixed together the latter of which having a pulse width control knob, which can be modulated as well.
Other circuits include a simple VCA and an envelope with attack and decay controls, a resonant VCF and an LFO with sine, triangle and square waves. I also included a real tube distortion running at 120 volts B+ (non of that starved plate BS) to add some more harmonics to the sound. As a final touch I added a third 555 oscillator which can hard sync both VCOs for some more fun.
PWM, filter cutoff and the hard sync oscillator all can be modulated to make some absolutely crazy sounds.
Here's a patch I threw together with the Korg SQ-1 and some reverb coming from the Zoom MS70-CDR.
"Erica Synths have prepared a lot of new products to present at this years Superbooth in Berlin. 13 new modules and... a new system! You read it right.
And this isn't even all that we have planned to release in the rest of 2019
Reminding that you can find us at the first floor lobby, booth E245.
Just look for all black everything!
"Fusion VCO2 is a full analogue sound source with lots of distinct features.
The core of the module is highly stable AS3340-based VCO with three simultaneously available waveforms, transistor-based suboscillator and detune function – two BBD delay lines that make frequency shifter that is mixed back to the principal oscillator in order to emulate two detuned VCOs. Tube crunch – distinct tube overdrive - is added on the top of the mix. Furthermore, Audio input mixes an external audio signal with the principal oscillator which results in crazy sonic experience. Fusion VCO2 is exactly what you need, if you wish to get really low frequencies and have a sound that sets your modular system apart from mass!
Features:
Full analogue design
Great tracking over 8 octave range
Detune function for thickening the sound
-1 oct transistor based suboscillator
Tube overdrive circuit
External audio input
VCO synchronization
Simultaneous waveform outputs"
"It works! Well one voice does on breadboard.
Up and running are 2 oscillators (CEM3340 based, but using AS3340)
These go to a 4066 switch then the waveforms are mixed, so you can switch on all of them on both oscillators.
The oscillator is based on the Prophet 5 circuit, the voice chip is a CEM3372, which was £35 but worth it, as it has everything, 2 inputs voltage controlled mixer, a low pass filter with cutoff/resonance and a VCA
Then an envelope generator to control the filter and amp (test just the amp)
So one full voice will need
2x oscillators
1x Signal processor
2x Envelope generators
1x CV mixer for the envelope and cutoff (filter only) and LFO CV
Microcontroller will feed SPI DACs that will be the voice and control CVs, but then all the voice circuits are analog."
A few new CEM and SSM chips for the DIYers out there.
First we have Latvian CEM Synth IC clones from ALFA:
AS3310 Voltage Controlled Envelope Generator. CEM3310 pin-to-pin compatible
AS3320 Voltage controlled filter. Improved CEM3320 pin-to-pin compatible
AS3330 Dual Voltage Controled Amplifier (VCA). Improved CEM3330 replacement.
AS3340, AS3345 Voltage Controlled Oscillator (VCO). CEM3340, CEM3345 pin-to-pin compatible
AS3360 Dual Voltage Controled Amplifier (VCA). CEM3360 pin-to-pin compatible
AS16M1 Serial Controlled, 16-Channel SPCO Switch
Next, Coolaudio [Behringer] announced they are working on new SSM chip clones (news via Soviet Space Child):
"Now that we have successfully cloned the famous Curtis 3340 and 3320 synth chips, we are now looking into reviving the great sounding SSM2044 and SSM2033 chips."
For previous posts including some with demos, see the corresponding labels below.
This post, like all posts, is an FYI that this all exists. It's up to makers and DIYers to decide where they get their chips. This post is worth reading.
