AMSynths May 2013 Newsletter - AM8044 Cascade VCF &VCA & More

"Newsletter May 2013
Latest News
Spring has arrived at last in the UK with at least one sunny day! At AMSynths we have been busy launching new modules and catching up on the backlog of reservations. Here is the latest news, check our web site here:

Module Plans
The popular AM8012, AM8075, AM8071 and AM8109 filter modules are in production and shipping to customers, along with the AM8328 Miarge Filter which we launched in January. The AM8044 VCF and VCA has now been launched with stock in the webstore. This module uses the SSM2044 chip to produce a very smooth filter and a simple VCA has been added after the VCF, which can either be used as a final level control or a 10V positive going envelope generator can be patched in.

The Dual ADSR AM8140 is the next module to go into production during May, along with the AM8060SE Dual State Variable Filter - with plenty of back orders to fill. The testing of the AM8027 Dual VCO has completed and the next stage is to build some production versions in June before we officially release the module for customer shipments.

PCB's and Panels
We launched PCB's and panels for customers that wish to build their own modules back in March, and they are proving very popular. We have a growing inventory in the web store, covering most of the Eurorack range. We have online Project Notes with BOM's and guidance on building and setting up.

E-mu Modular
One of the AMSynths projects for this year is to build an E-mu Systems Analog Modular synthesizer using panels from Exclusively Analogue, with some original E-mu PCB's and some re-designs that I have completed. You can read more about the project as it progresses over the next few months on our Blog."

Modular Tracks 2 - Tussilago

Modular Tracks 2 - Tussilago from Joris Menten on Vimeo.

"Finally something which resemble a track. Three sequences from the oberkorn playing. The slow bass note is the Livewire AFG with a litle bit of harmonic variation through a Sea Devils filter with cut-off modulated by the E350. High sequences are two sines from the Hertz Donut through an AMSynths JP6 filter. The plucky sequence is the Make Noise DPO through the QMMG. Lot's of delays (Pittsburg, Syntesis technology Mini delay, AS Echo)."

Amsynths, snowfall am8071

Published on Mar 16, 2013 heodesalciphron·91 videos

AMSynths March News Letter

"Newsletter March 2013
Latest News: At last a new AMSynths newsletter after nearly 6 months! We can only say we have been really busy....here is the latest news and plans for 2013.

Xmas was a busy time and we shipped over 25 modules to customers and completed the design of the AM8328 Mirage Filter - which has been shipping since early January. Customer demand has increased in 2013 , so we are we have restarted our sales to the SDIY market with panels, and blank PCB's now in stock and on sale in the online store. We have also added a free online reservation system here from the web store, so customers can be sure they will get a module. Production volumes have slipped back in February due to various holidays and a busy day job, but March and April will see more modules shipping and new products arriving.

Module Plans
The popular AM8012, AM8075, AM8071 and AM8109 filter modules are in production but there is a queue of reservations to satisfy before they will appear in the online store in large volumes. The new AM8328 Miarge Filter will see another 10 modules built in March, along with the arrival of the AM8044 VCF & VCA which has cleared testing and is going into production. It is the first module we have implemented with both a filter and final stage VCA, so all it needs is a dual ADSR and dual VCO to create some fantastic sounds. A special Dave Rossum tribute VCF, the AM8040 will be launched as a PCB sets for the SDIY market initially. It will have both 2 and 4 pole modes, and can use either a rare SSM2040 chip or the HM2040 replica. If there is sufficient customer demand it will be introduced as a completed EuroRack module based on the HM2040 chip, it will have the same panel design as an AM8109 JP8 VCF and provides the sounds of the SCI Prophet 5 early models as well as the original E-mu Systems Audity 16 voice synthesizer.

The versatile dual SVF filter, the AM8060SE, is completing it's first production PCB build this weekend and if this goes ok we can start manufacturing modules for a 24 March 2013 launch. I have put some photos of the prototype on the web store, and I will add some new demos soon. The Dual ADSR AM8140 is the other product launch for late March, with a first production build to check everything is ok. Then there is the AM8005 Diode VCF to finalise on 12V and get into production, I know alot of customers are waiting on this module, so it is top of the list!

The dual VCO's remain in development with the ARP version (AM8027) about to go into a final production stage, the reason for the delay is we had to find some switched vertical jack sockets that fit the design, which we now have. The JP8 Dual VCO is at design stagee with a few more months work to get all the extra features loaded, such as the quantiszed picth knob (using a PIC) and the in-built analog LFO. The VCO designs have been switched to dual rather than single to reduce the overall costs of 2 VCO's, which everyone needs.

A set of new modules planned for 2H2013 are waiting on the arrival of the right log response vertical pots from Small Bear. This includes a dual linear and expo response VCA (AM8164) and the AM83272 Ambient VCF (using the CEM3372). The AM8706 LFO can now more forward with the right vertical jack sockets, so expect this module and the AM8019 ARP style VCA to appear by mid 2013.

Customer Feedback
AMSynths really appreciates customer feedback and ideas. Just send an email to me at sales@amsynths.co.uk. The recently launched AM8328 Mirage Filter was all down to one of our customers, Adam, asking us to make this module using CEM3328 chips. This had led onto the idea of a Key Track pot on some new modules (AM8040) which enables filter cutoff to be varied up or down by the note played on the keyboard. So do let me know of the features and modules you would like to see. For example we have new ideas floating around at AMSynths HQ, for an audio mixer, ring modulator and noise source module, which kinda replicates the middle of an Roland SH-5 (AM8002) and a programmable ADSR with 64 patches which can be voltage controlled (AM8056). And if anybody on the list writes coolt DSP code, we would love to launch a Z-plane digital filter.

Future Plans
Our biggest problem is manufacturing enough modules to meet the increasing customer demand, and that is before we do any press marketing or shows! So we are completeing reaseach into larger scale assembly and manufacturing for some modules, to see what it does to the margins and retail prices. AMSynths have launched a partnership with SynthCube, where you buy my designs in MOTM, FracRac and other non-Euro formats. The AM4023 2 pole OTA filter is the first SynthCube module to hit production, but many more will follow in 2013. The web store will move to a new platform in late 2013 to provide a better presentation and more features. We will continue to operate 2 web sites, one as a secure store and one as a blog and information portal. And Finally, many thanks to all our customer for purchasing AMSynths products and your patience in trying to buy more. I will get more newsletters out this year, timed with product launches."

Left: "AM8328 VCF PCB Set

This is a PCB kit for the AM8328 Mirage VCF which enables you to build a EuroRack Module with a 16-pin 12V Doepfer Bus power connector. It may also work on 15V but I have not tried it out.

The AM8328 is a 4 pole Low Pass Filter that uses the CEM3328 filter chip to produce a amazing sounding VCF.

Project Notes:

Kit Components
The AM8328 PCB kit contains:
AM8328 POT PCB (ROHS compliant, blue solder mask).
AM8328 VCF PCB (ROHS compliant, blue solder mask).
You can also purchase Pot Brackets (x7), Jack PCB and an AMSynths factory AM8328 EuroRack panel.
Kits EXCLUDE the CEM3328 chip. You will need to locate one on eBay. An Ensoniq Mirage has 8x inside."

Above: "AM8328 The Mirage Filter

This module is based around the CEM3328 4-pole Low Pass Filter chip that was released in 1984, as one of the last filter chips and with some great features. It has differential signal inputs, an accurate exponential scale over 14 octaves and voltage controlled resonance. It has a unqiue feature, the signal level is automatically increased as the resonance goes up, thereby avoiding the usual signal level dropping off as resonance comes in. The CEM3328 was late onto the analog stage, just before digital filters appeared, so it only made it into the BIT01 and Ensoniq Mirage (and a few drum machines). So this chip has never really seen action, and was never under analog pot control, just lonely digital parameter access! In the Mirage it was not even allowed to oscillate…..We just love giving it a new lease of life in a new analog module!"

AMSynths AM8705 Dual ADSR Based on Roland 100m & System 700

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

via this auction
"This module is a Dual ADSR similar to the envelope generators in the Roland 700 and 100M modular analog synthesizers.
The AM8705 contains two identical traditional ADSR format envelope generators with variable Attack, Decay, Sustain and Release.
The module uses 30mm travel slide potentiometers and has toggle switches to switch between 2 different set of timings - slow or fast.

Detailed Description
This module contains two envelope generators each with 3 timed stages: Attack, Decay, Release.
The Sustain control adjusts the level to which the Decay time reduces to. Both ADSR’s are triggered together by an internal gate signal from the standard Doepfer 16 pin bus, or a front panel push button (MANUAL GATE), or individually via a gate signal connected to the front panel Gate jacks (GATE1, GATE2).
The standard duration of each stage is 10 seconds, but each ADSR can be switched using the TIME toggle switch into a fast timing 1/10 the duration.
This enables fast envelopes to be generated. Two identical control voltages are available for each ADSR, making it easy to patch an ADSR into both a VCF and VCA simultaneously.
The gate signal is displayed for each ADSR via a dedicated LED. Each ADSR generates a control signal from 0V to +10V."



The seller also has a Tiptop Audio Z3000 listed here.

AMSynths AM8705 Dual ADSR

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

via this auction
"This module is a Dual ADSR similar to the envelope generators in the Roland 700 and 100M modular analog synthesizers. The AM8705 contains two identical traditional ADSR format envelope generators with variable Attack, Decay, Sustain and Release. The module uses 30mm travel slide potentiometers and has toggle switches to switch between 2 different set of timings - slow or fast.

Detailed Description
This module contains two envelope generators each with 3 timed stages: Attack, Decay, Release. The Sustain control adjusts the level to which the Decay time reduces to. Both ADSR’s are triggered together by an internal gate signal from the standard Doepfer 16 pin bus, or a front panel push button (MANUAL GATE), or individually via a gate signal connected to the front panel Gate jacks (GATE1, GATE2).

The standard duration of each stage is 10 seconds, but each ADSR can be switched using the TIME toggle switch into a fast timing 1/10 the duration. This enables fast envelopes to be generated. Two identical control voltages are available for each ADSR, making it easy to patch an ADSR into both a VCF and VCA simultaneously. The gate signal is displayed for each ADSR via a dedicated LED. Each ADSR generates a control signal from 0V to +10V.

There is a Red gate LED for ADSR1 and a Blue gate LED for ADSR2. The toggle switches have colour coded caps (Blue and Red) and the single gate switch is a Red push button button."

Prokofiev's 'Dance of the Knights' for Analog Modular Synthesizer

Published on Dec 11, 2012 by justwaving

"This is the intro to 'Dance of the Knights' done just using the Modcan Touch Sequencer. There are 4 rows of 8 x 8 note sequences driving Modcan & Bubblesound VCOs. The filters used are the Intellijel Dr Octature, AmSynths JP8 and Doepfer A-106-5. This will be the last of my classical videos as I am busy on a new project. Some new material coming soon."

AMsynths Snowfall VCF filter

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

"So, this lush sounding filter is based upon the EMS Synthi / VCS3. It self oscillates, can track approx 1v/oct (with CV slider set centre), has switchable 18dB and 24dB slopes and switchable CV lag which sounds pretty special Genuinely, a fantastic sounding filter."

AMSynths AM8012 ARP 2600P & AM8005 Mult-mode Diode Filters & More

"Latest News: Over the last few weeks we have been been bringing new modules into production ready for launch in September. The first new module is the AM8012 Low Pass Filter with a traditional transisitor ladder design, customer shipments commence on 17th September. The second new module is the AM8005 Mult-mode Diode Filter [render below], which in complete contrast is a diode ladder and has 3 modes, low, high and band pass. Sound demos are now online on our web store. http://www.amsynthstore.co.uk/

Alongside these launches work continues on developing new modules, including the AM8027 VCO which has an improved sync feature and the addition of a sine waveform output. This module will be in production by the end of 2012, along with the 15 filter mode AM8372 Ambient Filter, and the AM8044 module which will now include a VCA as well as the SSM based VCF. The AM8075SE Athena filter sold out very quicky and another batch will be available soon. In the web store we have for sale the AM8109 JP8 VCF and AM8705 Dual ADSR, and a growing range of bare PCB's and component packs for SDIYers."

AM8075SE Athena VCF

AM8075SE Athena VCF Demo by AMSynths
via AMSynths
"Back in the 2004 I replicated the ARP 4075 VCF module using exactly the same design and sold a few PCB's to customers as the AM4075. I also licensed the design to Bananalogue, and you can still buy these modules on eBay all these years later. The licensing deal enabled me to buy a new PC and greatly speeded up my design work, which is all done in Eagle CAD. Whilst the filter sounded good, I wanted to improve and simplfy the design when I started up AMSynths. I also wanted to use slider potentiometers and introduce a HPF - the idea of a Special Edition version (SE) was born.

Athena The AM8075SE filter is the first module to be launched as part of a complete modular analog monosynth. VCO, VCA, ADSR etc will all follow. Athena is the greek god of inspiration.

The Special Edition At the end of 2011 I had a new prototype on the test bench, implemented with matched transistor pairs, reworked LM3900 power supply and cut out the rejection trimming circuit as this was no longer needed with matched transistors. Op Amp buffers before and after the filter core were added, as the one complaint from the original AM4075 was that it was rather quiet as it had no buffer circuits and worked best on 10V audio signals.

I added a 1-pole high pass filter based on the classic Roland OTA circuit rather than the awful design in the Odyssey. Slider potentiometers are used through out and after some adjustments to work on 12V power the VCF sounds fantastic! The matched arrays make a great improvement along with using high quality filter capacitors. The slider caps are the same as in the Odyssey Mark 1 and 2, and they will appear through out the Athena synthesizer (and yes I do have pink caps!).

The moudle went into production in July 2012 and the first batch sold out quickly. Further batches will be manufactured, as there are no rare parts to find.

AMSynths Panel The panel is professionally manufactured in 1.6mm thick alumnium in Germany with black lettering. The module is EuroRack sized and fully compatible with many other EuroRack modular synthesizer systems such as Doepfer."

Modular Tracks 1 - Tanacetum

Modular Tracks 1 - Tanacetum from Joris Menten on Vimeo.

The first real "track" here. I wanted to do something summery like Roedelius or so. Not sure if it is the Belgium weather but it didn't end up that summery.

No full explanation of the patches this time, but some info:
- main sequence is from the oberkorn: 2 16 note sequences, each played twice, using a clock divider and sequential switch
- these sequences are played by the Livewire AFG through the AMSyths JP6 filter
- then through my Korg PME4: 3 analoge delays+flanger
- baseline is from the 3rd channel of the oberkorn, played by a doepfer VCO through the AS multimode filter
- the "strings" are the could generator controlled by an SQ8 sequencer through the AMSynths JP8 filter (clocked at 1 step for each 16 steps on the oberkorn), through a Boss DD20 delay
- everything is transposed by a second SQ8
- all notes are quantized using 2 doepfer quantizers
This is recorded in one run. Then I added two tracks whit some random noises from a noise source through an AS "EMS" filter, an AS echo module and the korg PME40X pedal board.

The mandolin was not used ...

Jupiter 8 Filter by AMSynths

Jupiter 8 Filter by AMSynths by Point Source
"Just a small demo of this great filter by AMSynths."

Modular Acid

YouTube Published on Jul 7, 2012 by bdufdiskc

"909 sets the drums, OSC303x2 + STG .COM into AMSynths JP8 filter into Blue Lantern ninja VCA, controlled by a bunch of other stuff for sequencing and modulation (154/155, MakeNoise PP+Brains, 4MS PEG, Topobrillo Quantimator, TipTop Z3k, etc). Mmmm, acid."

Modular Tracks 1

YouTube Published on Jul 6, 2012 by pjoris2

"The first real "track" here. I wanted to do something summery like Roedelius or so. Not sure if it is the Belgium weather but it didn't end up that summery.

No full explanation of the patches this time, but some info:
- main sequence is from the oberkorn: 2 16 note sequences, each played twice, using a clock divider and sequential switch
- these sequences are played by the Livewire AFG through the AMSyths JP6 filter
- then through my Korg PME4: 3 analoge delays+flanger
- baseline is from the 3rd channel of the oberkorn, played by a doepfer VCO through the AS multimode filter
- the "strings" are the could generator controlled by an SQ8 sequencer through the AMSynths JP8 filter (clocked at 1 step for each 16 steps on the oberkorn), through a Boss DD20 delay
- everything is transposed by a second SQ8
- all notes are quantized using 2 doepfer quantizers
This is recorded in one run. Then I added two tracks whit some random noises from a noise source through an AS "EMS" filter, an AS echo module and the korg PME40X pedal board.

The mandolin was not used ...;"

AMSynths AM8109 JP8 Low Pass VCF & June 2012 Newsletter

via AMSynths

"This module is replication of the Low Pass Filter 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 self oscillation, a sound very reminiscent of the early 1980's.

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.

EuroRack Module: 14HP wide
User Manual: Download PDF

Our Price: £125.00

Stock Status: New Stock in mid May
Availability: Reservations being taken now."



You might remember this one from this video back in September of 2010.

Via the June 2012 Newsletter:

"Latest News: We have had a busy few weeks shipping modules and completing the design of the AM8075SE Athena VCF and the AM8005 SH-5 VCF ready for launch in June. Stocks of the AM8705 Dual ADSR and AM8071 SnowFall VCF have run low, but we will have new stock in June. The AM8109 JP8 VCF consistently sells out but we have enough parts for another 20 to be shipped in 2012.Initial shipments of the AM8319 Diode Array VCF have started and a new iPad catalogue has been launched along with more SoundCloud demos. Work continues on completing the AM8027 VCO and AM8047 UAF, and a new online store will be launched later this month to enable customers to purchase straight from stock and with automatically calculated shipping."

AMSynths Update & AM108 Jupiter-8 / Jupiter-4 Filter

I just received the AMSynths newsletter. The latest news is that the AM8319 Ring Wraith will be in production in early January, and the AM8005 Filter Cube, AM8047 UAF and AM8027 VCO will follow. The newsletter also mentioned their current modules which you can find on their website.

The one module I realized I haven't posted yet is their AM108 Jupiter-8 and Jupiter-4 filter pictured here.

"This module is replication of the Low Pass Filter 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 self oscillation, a sound very reminiscent of the early 1980's.

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."

Other modules in development include:

AM8012 ARP2600P transistor VCF
AM8027 ARP2600P VCO
AM8044 Cascade LPF and HPF
AM8047 ARP2500 Universal Active Filter
AM8475 Odyssey VCF and HPF
AM8706 Titan Modulation Source
AM8280 CS80 Dual SVF
AM8104 Roland JP VCF + HPF"

AMSynths AM8705 Dual ADSR Envelope & AM8060 JP6 Multi-Mode VCF

via AMSynths

"This module is a Dual ADSR similar to the envelope generators in the Roland 700 and 100M modular analog synthesizers. The AM8705 contains two identical traditional ADSR format envelope generators with variable Attack, Decay, Sustain and Release. The module uses 30mm travel slide potentiometers and has toggle switches to switch between 2 different set of timings - slow or fast."



"This module contains two envelope generators each with 3 timed stages: Attack, Decay, Release. The Sustain control adjusts the level to which the Decay time reduces to. Both ADSR's are triggered together by an internal gate signal from the standard Doepfer 16 pin bus, or a front panel push button (MANUAL GATE), or individually via a gate signal connected to the front panel Gate jacks (GATE1, GATE2).

The standard duration of each stage is 10 seconds, but each ADSR can be switched using the TIME toggle switch into a fast timing 1/10 the duration. This enables fast envelopes to be generated. Two identical control voltages are available for each ADSR, making it easy to patch an ADSR into both a VCF and VCA simultaneously. The gate signal is displayed for each ADSR via a dedicated LED. Each ADSR generates a control signal from 0V to +10V.

There is a Red gate LED for ADSR1 and a Blue gate LED for ADSR2. The toggle switches have colour coded caps (Blue and Red) and the single gate switch is a Red push button button."


"This module is a replication of the Jupiter 6 voltage controlled filter which comprises two 2-pole OTA filters in series, and was launched in 1983. Each 2-pole filter can be switched into either Low Pass or High Pass modes providing three VCF modes all with variable resonance:

24dB Low Pass Filter
24dB High Pass Filter
12dB Band Pass Filter

This voltage controlled filter has a more aggressive sound than a simple 4 pole OTA based filter, along with a lot more flexibility...

This module is a multi-mode voltage controlled filter with front panel controls for adjusting the Cutoff Frequency and Resonance as well as the level of 2 control voltages and 3 audio signal inputs. There are six 3.5mm jack sockets on the right of the front panel; the filters audio output, 2 control voltages and 3 audio inputs. The filter topology can be adjusted using two front panel latching push buttons.

The filter has two 2-pole OTA filters in series, and the blue and grey push buttons select from 4 filter modes, each sounding different:

24dB Low Pass Filter - Blue and Grey OUT
24dB High Pass Filter - Blue and Grey IN
12dB Band Pass Filter - Grey IN and Blue IN
12dB Band Pass Filter - Grey OUT and Blue IN"

See http://www.amsynths.co.uk for more.

AM8071 Snow Fall VCF

via AMSynths

"This module is a traditional diode ladder low pass filter similar to that in the EMS VCS3, Roland SH-3, System 100 and the PE Minisonic 2. The filter has a 4-pole ladder with an 18dB like response, thanks to the characteristics of diodes. A fifth pole can be switched in to give a steeper 24dB response using the Slope switch. The control voltages can be smoothed out using the Lag switch, to give a more fluid modulation.

The filter has adjustable Cutoff Frequency and Resonance, along with a resonance CV input, 2x Signal inputs and 2x Frequency Cutoff CV inputs. The panel design is a mix of rotary and slide potentiometers. The filter was developed during the heavy snowfalls across the UK in February 2010, hence the name."


via the AMSynths blog: "Back in the late Winter of 2009/2010 there were heavy snow falls in south east England for the first time in many years. During this "white out" I designed a diode ladder voltage controlled filter similar to the ones that appeared in a number of analog synths in the 1970's, and named this new module "Snow Fall". In 2009 I had already built a number of prototype 4-pole diode filters from the EMS VCS3, Roland SH-3 and the Practical Electronics Minisonic 2. I improved the designs with modern components and added a fifth pole and slew delay on the CV input. This AM8071 protptype was very sucessful and delivered a great sounding and flexible VCF.

During Summer of 2011 the prototype was worked up into a production design using the new AMSynths panel design which has a mix of rotary and slide pots, with momentary push buttons. The production units were launched on 20 September 2011 and this EuorRack module is available to purchase from AMSynths web site."

AMSynths JP6 Multi Mode Filter Demo AM8060 (JP 6 - Filter)

Demo AM8060 (JP 6 - Filter) by Sägezahn-smoo
"Lowpass -no reso, Lowpass reso, Highpass, Bandpass, then the same without FX at all."

via sequencer.de

Snow Fall - EMS VCS3 Filter Clone

via AMSynths

AM8071 Module - "Snowfall" Diode Low Pass Filter

"During the exceptionally snowy weeks of early 2010 I built a redesigned version of this classic filter which was used in the EMS VCS3 and AKS synthesizers in the 1970’s. With snow falling and the wonderful bubbly sound of the filter, I named this module - Snow Fall. It was a 4-pole diode ladder low pass filter using all discrete and rather old components. The Roland SH-3 filter (AM8003) and PE Minisonic 2 (AM8050) filters are close copies of this legendary design.

EMS originally (in 1970) described the filter as Low Pass and with a cutoff rate 12dB for the first octave and then 18dB per octave thereafter, with band pass filter response at medium Resonance levels and a maximum Q of 20. From early 1974 EMS updated the filter with an extra capacitor at the base of the diode ladder to provide a steeper 24dB per octave response, this appears to have changed the character of the filter. The filter frequency response is stated as 5Hz to 10kHz.

In terms of electronic design the standard filter is 4-pole but the characteristics of diode ladders makes this sound more like 18dB, and the 24dB version is really 5-pole. No matter, the filter sounds fantastic....

Visit the AMsynths web site for the full story here..." You will find samples there as well.
Be sure to see the rest of AMSynths for more DIY clones and projects.
via VICMOD