Showing posts with label AMSynths. Show all posts
Showing posts with label AMSynths. Show all posts

Thursday, November 02, 2023

SEM vs SEM - November 2023 edition

video upload by John Schussler

"The G-Storm Electro SEM VCF arrived the other day, and I figured I'd give it a listen in comparison to what, up to this point, I think is the best SEM eurorack module: the Studio Electronics SEM VCF.

(Spoiler alert: The G-Storm gives the SE a serious run for its money)

I've also thrown in the Bubblesound SEM20 and an AMSynths Obie XA. The Bubblesound is mostly SEM, but with some MS-10 bits grafted on that makes it more aggro. The Obie XA isn't a SEM at all, different chip, but is also modeled after an Oberheim filter so I figured I'd toss it in for contrast.

VCO is a Befaco Pony, first on saw then on square. Sequencer is a Clank Chaos. Envelope is Zadar.

Be forewarned: a lot of this video is me going back, and forth, and back, and forth, and back and forth between modules. Don't get seasick.

00:00 Intro
00:20 Standard gain
03:43 Gain up
06:46 Resonance up
08:56 Tight envelope
16:00 Square wave"

Wednesday, October 04, 2023

AM8122 Dual SVF (100M)

AM8122 BRIEF DEMO video upload by AMSynths

via AMSynths

"Overview The original Roland 100M (1978) has only one type of voltage controlled filter, 24dB low pass. This rather limits the range of sounds that can be created with the synthesizer and it is strange that Roland never ported the 703 2-pole OTA SVF into the 100M format. The AM8122 closes this gap and provides two 2-pole State Variable Filters in one 16HP module.

AMSynths Design The AS3320 chip is used to create the SVF, rather than the CA3080 OTA in the original 703 module. This is partly down to the limited PCB space for two filters and partly because the 3320 chip in SVF mode sounds very good, think Oberheim OBX. An alternative approach would be to build a dual Jupiter 6 SVF with AS3109’s, but this is tricky to achieve given the limited PCB space and we already produce a Jupiter 6 module – the AM8060 module.

The AM8122 circuit reuses the 2-pole SVF in the AM8325 and adds the BP mode and voltage controlled resonance. The third CV input is used as the Resonance CV input. The front panel design follows the Behringer 121 module with signal and CV input trimmers, frequency and resonance on 30mm sliders and green and red indicator LED’s.

Each filter has two outputs, with a slide switch selecting which filter output goes to which jack socket. The upper jack socket (OUT) can be set to either LP, BP or HP and the lower jack socket (REV OUT) follows the reverse (HP, BP, LP). This approach ensure the LED’s track the filter mode selected by the switch, whilst still providing individual outputs of each filter mode. The three signal inputs of the second filter are normalised to the outputs of the first filter (HP, BP and LP), so that the filter modes can be mixed together and filtered again!

Front Panels The panels use the same manufacturing process as the earlier AMSynths 100Mmodules, with a white silk screen over a dusty grey powder coated panel.

Outcome & Availability The module and panel were designed in December 2022. In 1Q23 the prototype PCB’s were debugged, with the revised LED drive and increased filter output levels so they are all the same (10V p-t-p). Production modules will be availble in 3Q23. The AM8122 will be the first AMSynths module to use SMD manufacturing processes (JLCPCB) for the PCB’s."

Monday, September 25, 2023

New AMSynths DIODE-01 Based on the Roland System 101 + 102 Extras

AMSynths, makers of various Roland clone modules is coming out with a complete desktop synth based on the Roland System 101, named the DIODE-01. Some info and pics follow.

"NEW SYNTH ALERT: Here is the aluminium panel for the AMSynths DIODE-01 analog synthesizer. It is an accurate replica of the Roland System 101 with its diode ladder filter, combined with the extra features of the 102 (Ring Mod, S&H). The prototype will be ready in October. What do you think?"

Wednesday, April 19, 2023

AMSynths 100M Module Update

video upload by AMSynths

"An update on the new AMSynths range of Eurorack modules that re-imagine the Roland 100M prototypes of 1978, and add exciting new modules and features. Seven modules are in development with release dates from May 2023. New powder coated panels with white silk screen lettering have been developed over the last few months, along with custom components."

Wednesday, February 22, 2023

New AMSynths AM8109SE Low & High Pass Jupiter 8/4 Filters Eurorack Module

"This module is replication of the Low Pass and High Pass Filters from the legendary Roland Jupiter 8 and 4. This is a 2 and 4 pole OTA design that Roland first used in the Jupiter 4 in 1980, replacing a discrete version of the filter which took up more PCB space.

This is a warm sounding filter with smooth frequency control and a resonance that gradually increases up to full resonance, just before self oscillation, a sound very reminiscent of the early 1980's. The original Jupiter 8 filter did not self oscillate, and we have retained this configuration. However the customer can set the filter to self oscillate by adjusting a PCB trimmer on the rear of the module.

The difference between 2 and 4-pole modes is not dramatic, with the 2-pole mode providing a more gradual cutoff slope and silky sound. The high pass filter provides a gradual cutoff of low frequencies.

The AM8109SE is a new version of the 2010 AMSynths design, with slide potentiometers and a skiff friendly module depth of 35mm.

Eurorack Module: 14HP wide
User Manual: AM8109 Quick Start Manual

This module is an accurate reproduction of the Jupiter 8 low pass voltage controlled filter, using the AS3109 OTA chip in the filter core, as well as the high pass filter that uses an AS662 chip. The design has been updated to use modern components with high quality capacitors in the signal path. It delivers a very warm and smooth sound.

There are front panel sliders for adjusting the Cutoff Frequency and Resonance of the low pass filter, and level control of 3x control voltages (MOD, ENV and KYBD) and 2x audio signal inputs. The high pass cutoff frequency is adjusted using a rotary potentiometer with an original Boss coloured control knob.

There are five 3.5mm jack sockets at the base of the black anodised 2mm front panel;
2x audio inputs
3x control voltages
1x audio signal output
There is an audio output jack at the top right of the module. The slope of the filter can be switched between 2 and 4 poles using a small slide switch, and the envelope CV signal can be inverted using a second slide switch.

The module comes with a set of M3 mounting screws and washers, and a standard Doepfer power cable."

Friday, December 30, 2022

AMSynths 2023 Module Plans

video upload by AMSynths

"AMSynths plan to release a new range of Eurorack modules in 2023 inspired by the Roland 100M. Thsi video provides an overiew of the first five modules that are in development. They are a combination of originals being reworked and expanded, prototypes replicated and many new ideas. These accurate designs, that use high quality components, will truely inspire new electronic music."

Wednesday, May 25, 2022

Amsynths AM1047K Kybd Percussion for Behringer 1047 Multimode Filter

video upload by O.Z. Hall

"The Amsynths AM1047K Keyboard Percussion module is a companion to the Behringer ARP 2500 series 1047 Multimode Filter. Check it out.

Here's a link to this module in the AMSynths store:"

Wednesday, April 27, 2022

AMSynths SUPERBOOTH Module News - April 2022

"Getting Ready for SuperBooth 22

We are hard at work developing new modules for launch at the best synth show of the year - Superbooth 22. We will be announcing the red faced AM8101 filter [posted here], a replica of the low pass filter in the Roland SH-101, as well as the AM8102 SH-2 style filter [below].

The AM8109 and AM8060 Jupiter filters are being relaunched - 10 years after they were introduced, with Special Edition and slim 10HP versions. AMSynths will also be announcing SH-101, Jupiter 6 and 8 VCO's to pair with these filters alongside the current Jupiter 4 VCO and VCF."

This module is faithful replica of the filter from the legendary Roland SH-2 that was released in 1979. The AM81012 is a fantastic sounding 4-pole low pass filter with that unmistakable Roland filter sound in a narrow skiff friendly, Eurorack module.

The module use an Alfa Rpar AS622 chips in the filter core (BA662 clones) and high quality polpropylene filter capacitors. The design includes buffering Op Amps to interface to Eurorack modular levels. The filter does not have Q compensation but the signal level does not decrease dramatically with higher Q settings. The resonance is smooth and controllable into self-oscillation, and the filter will oscillate from 20Hz to 20kHz.

There are slide potentiometers (with LED's) for adjusting the Frequency Cutoff, and the frequency modulation from Keyboard, LFO and Envelope CV signals, There are rotary potentiometers for adjusting the mix between two audio inputs and Resonance. There is a small slide switch to select whether the envelope CV input is Normal or Inverted.

The AM8102 is hand built with high quality components, including Wima polypropylene capacitors, Alpha potentiometers, and TR808 style control knobs.

There are six 3.5 mm jack sockets on the front panel:
2x audio inputs
3x frequency CV inputs
1x audio output
The module comes with a set of M3 mounting screws and washers, and a standard Doepfer power cable.

Thursday, March 31, 2022

New AMSynths SH-101 Eurorack Filter Module in the Works

via AMSynths

"The next new module from AMSynths will be the AM8101 VCF. A faithful recreation of the the low pass filter in the SH-101 mono synth. We expect to start shipping production modules with red anodised aluminum panels in April. #eurorack #eurorackmodular #amsynths #analog #synthesizers"

Tuesday, February 15, 2022

OB-Xa Eurorack filter comparison

video upload by John Schussler

"This is 20 minutes of me bouncing back and forth between two Oberheim OB-Xa style eurorack filters, trying to hear the differences between them. If you're not deeply interested in OB-Xa filters, you're probably better off moving along.

Still here? Ok. So, these two filters are close but not identical to the original VCF in the Oberheim OB-Xa. They have some improvements here and there, but for the most part are true to the original sound of the Oberheim. (I don't have an OB-Xa, so whether they're exactly the same or not I have no idea.)

As I go through I'm going to first try and get them as identical as possible, then listen to their less identical aspects.

In both cases I'm sticking to the 'standard' model, not the state variable option.

Sorry for the crackles here and there, my interface seems unhappy. They don't get in the way, they're just occasionally irritating."

Tuesday, December 28, 2021

New AMSynths AM8325 OBIE-XA FILTERS Eurorack Module


"The AM8325 module is a recreation of the 2 and 4 pole filters in the Oberheim OB-Xa. The filter uses two AS3320 filter chips to produce an amazing sounding VCF. The 2-pole filter is a state variable, reminiscent of the Oberheim SEM, with low pass and high pass outputs. The 4-pole filter is a classic 24dB OTA low pass.

Euro Rack Module: 14HP wide

The filter has two audio signals inputs with level control (OSC1, OSC2), frequency cutoff and resonance controls, along with two frequency modulation controls (MOD and ENV). There is also a dedicated keyboard input for controlling the filter cutoff from a pitch signal.

Front panels slide switches control whether the keyboard pitch CV is ON or OFF, and which filter mode is provided at the output:
2-pole low pass
2-pole high pass
4-pole low pass
There are six 3.5mm jack sockets mounted on the bottom of the panel;
Signal Inputs (x2)
CV Inputs (x2)
Keyboard Input
Signal Output.
The module comes with a 10-pin power cable and a set of mounting screws and washers (M3 silver)."

Priced at £140.00 ~$188.00 US

Tuesday, September 14, 2021

AMSynths at SuperBooth 2021

video upload by AMSynths

"AMSynths launch re-imagined AM8012 VCF at SuperBooth 2021"

Monday, April 12, 2021

The Prague - New Analog Mono Synth Coming from AMSynths

video by AMSynths

"AMSynths are launching a new analog mono synth called the Prague in May, and here is a video with its features."

Monday, January 20, 2020

NAMM2020 - Introducing the Behringer 2600 (Part 2)

Published on Jan 20, 2020 BEHRINGER

"First look at our 2600 Synthesizer. #NAMM2020"

NAMM2020 - Introducing the Behringer 2600 posts

Sunday, January 19, 2020

NAMM2020 - Introducing the Behringer 2600 (Part 1)

Published on Jan 19, 2020 BEHRINGER

With Rob Keeble of AMSynths


NAMM2020 - Introducing the Behringer 2600 (Part 2)

Published on Jan 20, 2020 BEHRINGER

Thursday, January 16, 2020

NAMM 2020 - Introducing System 100 - Behringer Modular Synthesizer

Published on Jan 16, 2020 BEHRINGER

"Introducing eleven new Eurorack compatible modules – all of them authentic reproductions of original “System 100M” circuitry from 1975. With ultra-fat oscillators and creamy filters the sound became famous in the early 80s used by artists like Depeche Mode, Human League, Tears For Fears but also Vangelis, Tangerine Dream and even Aphex Twin.

If you’re into super-fat bass sounds, in-your-face leads or flowing soundscapes, definitely check them out! All modules are incredibly feature rich, have tremendous patching capabilities and a lot of them come with dual function, like:

- 112 dual oscillator with 3 waveforms, PWM and two sync modes
- 121 dual filter with 3-channel mixer per filter
- 130 dual VCA, again with dual 3-channel mixers
- 140 dual envelope has 3 outputs per ADSR plus a built in LFO that can be triggered and phase synced
- 173 gates module comes even with four gates that can switch audio and 6 quad buffered multiples
- 297 has a dual portamento controller plus two independent CV mixers
- 150 brings a ring modulator, 2 noise generators, syncable LFO and a sample and hold generator
- 172 module delivers a 6-step phase-shifter, an analog delay, an LFO and a gate delay
- 305 is an output module a four-band parametric EQ, a 4-channel mixer, line and separate headphone output and even a tuning oscillator
- 182 there is a powerful analog sequencer with either dual 8 steps or 1-16 steps and tempo, portamento and gate time controls
- 110 is a complete synth voice with VCO, VCA and filter in a single module


Update: Word is this might be an AMSynths joint project. From their website:

"Behringer Partnership In June 2019 I joined forces with Behringer to design analog synthesizers that will be manufactured in China and sold to customer across the world. I am working on a number of projects which I will let Behringer announce when they are ready. AMSynths is continuing to grow with more Euro Rack modules being manufactured, as well as complete synthesizers like the SH05 and Jupiter One. In 2019 I started to restore vintage music gear, and you will see the repair stories in my Blog. I am also creating videos of my modules and the vintage synths that they emulate."

Update: some product sheet scans in in via Soviet Space Child and a note on one of the forums from Uli.

"I like to share with you the initial drafts of our M100 Eurorack Series.

These are 13 MID's or concept documents we create for every single product as part of our PLM (Product Lifecycle Management) process before we hand them over to our R&D departments for development.

We haven't decided yet which of these modules we will actually produce as it is important that we achieve a certain production volume.

As usual do we appreciate your valuable feedback which will give a better indication of validity of these products.




SYSTEM 100 182 Analog Sequencer

Saturday, August 18, 2018

SSM2044 Compared to SSI2144 at Resonance

Published on Aug 18, 2018 AMSynths

"SSM2044 VCF chip with resonance varied from minimum to maximum, so a comparison with the SSI2144 chip can be made."

SSI2144 at Resonance

Published on Aug 18, 2018 AMSynths

"SSI2144 VCF chip with resonance varied from minimum to maximum, so a comparison with the SSM2044 chip can be made."

Sunday, March 11, 2018

AMSynths AM8400 Jupiter-4 VCO Clone Waveforms

AM8400DemoMovie Published on Mar 11, 2018 AMSynths

"Quick demo of the various wave shapes from my Jupiter VCO clone, note the sawtooth waveform, is composed of curved steps."

via AMSynths:

"This is replica of the VCO in the Roland Jupiter 4, their first polyphonic synthesizer introduced in 1978. The original VCO is a unique design based around a 555 timer and a CMOS divider chip, which was not seen in any other synthesizer. The Jupiter 4 is famous for its powerful sounds and efficient controls. The constraints of microprocessors in 1978 mean there were only 16 sliders that could be memorised, which limited the functionality of the VCO to 4 octave range and 3 waveforms.

This VCO is the sound of early Human League and Depeche Mode albums.

Detailed Description

The AMSynths circuit is very close to the original except for a new Tempco based matched transistor pair rather than the obsolete heated uA726 chip, as the exponential generator and variable slider controlled Pulse Width rather than a 4-way switch.

The waveform shapes are created from the 555 timer which generates square waves that are divided down for the lower ranges. These square waves are used for the square wave output and are perfect and stable 50/50%. They are also approximated into a sawtooth which has as many steps as the range (16′ has 16 steps, 2′ has just 2 steps). The sawtooth wave is therefore not perfect and is made up of steps, this creates a different sonic shape as you change octave. The pulse width wave is created from the sawtooth rather than the square wave, and therefore has some variability in width, rather than being totally stable. Adjusting pulse width is effectively quantised by the sawtooth steps and jumps from one setting to the next rather than being smooth.

Tuesday, August 29, 2017

New Jupiter-6 VCF Eurorack Filter Clone In-Depth Demo

Published on Aug 29, 2017 gstormelectro

"Audio and Video by G-Storm Electro c.2017

In this video I do a more in-depth demo with my Jupiter-6 VCF multi-mode filter clone eurorack module. It's a very colorful filter that gets more interesting with more complex signals you feed into it. It also has an aggressive nature that comes out when the inputs are overdriven.

Two different oscillators can then be mixed together. A sawtooth oscillator is used, a square/PWM wave is used. Different filter modes can be selected: 4-pole lowpass, 2-pole bandpass, 4-pole highpass. Also, two different control voltage modulations can be mixed together to change the frequency. I run a decay envelope from the Bastl Skis along with a triangle LFO, then I use Sample-and-hold. The oscillators are coming from my Pittsburgh Modular Synthesizer Box. Recorded direct to Tascam DR-05 from my Mackie mixer, no effects, no normalization. Beware some low and high frequencies, so watch your levels while listening to the demo."

You can find additional demos here.

Tuesday, June 06, 2017

New AMSynths AM8144 "Fat Keys" VCF SSI2144 Based Eurorack Filter Module

via AMSynths

"This module uses the SSI2144 chip to provide a 24dB Low Pass voltage controlled filter. This is a new chip based on the original SSM2044 from 1980. It is a cascade filter designed by Dave Rossum and Ron Dow, and re-issued by Dan Parks at SSI. It emulates the Moog ladder filter but with improved accuracy and lower noise using current mirrors.

This is a warm sounding filter with smooth frequency control and a resonance that gradually increases up to full self oscillation, a sound very reminiscent of the mid 1980's.

There are front panel controls for adjusting the Cutoff Frequency and Resonance as well as the level of 2x control voltages and 3x audio signal inputs. We have used high quality control knobs on the AM8144, a new atheistic for AMSynths modules.

There are six 3.5mm jack sockets on the right of the front panel;
3x Audio Signal Inputs (10V peak to peak)
2x Control Voltages (0V to +5V)
Audio Signal Output"

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

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