Let's Play with EG WaveShaper

Published on Oct 11, 2019 Tim Webb

"Elliott Garage's EG WaveShaper is a powerful wavetable synth with a simple interface that I really enjoy playing around in. Let's Play with it!

EG WaveShaper on the App Store: https://apps.apple.com/app/id1445356061

If you've enjoyed this series please consider supporting it by becoming a Patreon: https://www.patreon.com/discchord If you'd prefer to help on a monthly basis, instead of per video, there is a monthly Patreon campaign: https://www.patreon.com/discchord_com Or you can support me on Timmeon if you don't like Patreon: https://discchord.com/supporters#timmeon (Patrons of these campaigns get the same benefits, including Ad Free viewing on the site!)

Be sure to visit http://discchord.com for the latest music app news!"

Introducing EG WaveSHAPER

Published on Dec 18, 2018 ElliottGarage

"Download url:
https://app.elliottgarage.com/waveshaper

EG WaveSHAPER is the first synthesizer that lets you create your sound with a finger.

Draw the waveform on the screen or shape a builtin one, mix it with a classic analog oscillator and a sub oscillator and automate all the knobs with 2 drawable LFOs and 2 ENVs

HYBRID WAVESHAPING ENGINE
'Waveshaping is a synthesis-and-transformation technique that turns simple sounds into complex sounds'

2 wavetables can be designed and morphed to create unique and dynamic sounds under your finger, choosing the morph attack and release; complex spectra can be created waveshaping the oscillator and introducing non linear distortion, rich harmonics and a tube-vacuum behaviour.
The hybrid Waveshaping/Wavetable engine lets you combine a wavetable oscillator with a classic oscillator and a sub oscillator, to add additional sound layers and depth.

LFOs & ENVs
2 Lfo and 2 Envelopes with indipendent time can be assigned to virtually any of the synth parameters. They can also be graphically designed with the touch of your finger or you can choose among the builtin envelopes.

OTHER FEATURES
- Hybrid Wavetable/Waveshaping engine
- Draw your wavetable oscillator with your finger
- 100+ builin presets
- 30+ builtin waveforms to use and modify
- 2 LFOs and 2 ENVs assignable to any parameter
- FX: Reverb, Delay and EG Crush
- Detune osc to create huge unison sounds
- FM and Noise with configurble FM Ratio and Noise eq
- VCF and Reso filters
- Complete presets management with export and share
- Core MIDI: MIDI in, MIDI CC, MIDI poly aftertouch
- AU3 with full knobs parameters automation
- Universal for iPad & iPhone"

EG WaveSHAPER for iPad

Published on Dec 9, 2018 ElliottGarage

"Itunes url:
https://itunes.apple.com/us/app/eg-wa...

EG WaveSHAPER is the first synthesizer that lets you create your sound with a finger.

Draw the waveform on the screen or shape a builtin one, mix it with a classic analog oscillator and a sub oscillator and automate all the knobs with 2 drawable LFOs and 2 ENVs

HYBRID WAVESHAPING ENGINE
'Waveshaping is a synthesis-and-transformation technique that turns simple sounds into complex sounds'

2 wavetables can be designed and morphed to create unique and dynamic sounds under your finger, choosing the morph attack and release; complex spectra can be created waveshaping the oscillator and introducing non linear distortion, rich harmonics and a tube-vacuum behaviour.
The hybrid Waveshaping/Wavetable engine lets you combine a wavetable oscillator with a classic oscillator and a sub oscillator, to add additional sound layers and depth.

LFOs & ENVs
2 Lfo and 2 Envelopes with indipendent time can be assigned to virtually any of the synth parameters. They can also be graphically designed with the touch of your finger or you can choose among the builtin envelopes.

OTHER FEATURES
- Hybrid Wavetable/Waveshaping engine
- Draw your wavetable oscillator with your finger
- 20+ builtin waveforms to use and modify
- 2 LFOs and 2 ENVs assignable to any parameter
- FX: Reverb, Delay and EG Crush
- Detune osc to create huge unison sounds
- FM and Noise with configurble FM Ratio and Noise eq
- VCF and Reso filters
- Complete presets management with export and share
- Core MIDI: MIDI in, MIDI CC, MIDI poly aftertouch
- AU3 with full knobs parameters automation
- Universal for iPad & iPhone"

ElliottGarage How to synth - Escape from NY (1981 John Carpenter and Alan Howarth)

Published on May 5, 2019 ElliottGarage

"All synthesizers sounds are designed and created with iPhone/iPad EG WaveSHAPER, used as sound module inside Logic Pro X."

Additional posts featuring EG WaveSHAPER.

EG WaveSHAPER - Trailer

Published on Dec 20, 2018 ElliottGarage

Previous posts featuring EG WaveSHAPER.

Doepfer Modular A-106-1 Xtreme Korg MS-20 Filter

via this auction

"below is the manufacturers info:
[possibly the longest ever]

Module A-106-1 has it's origin in our experiments to built a MS20 filter clone. The famous original MS20 included two filters: a 12 dB lowpass and a 6dB high pass filter connected in series both with a very special design (the MS20 highpass if very often described as 12dB high pass, but this is not true). During our researches we found a way to use the same circuit simultaneously as lowpass and highpass for 2 different audio signals (a bit similar to the A-101-1 Steiner Vactrol filter that has even different audio inputs available, but with the special MS20 circuit). For this two separate audio inputs for lowpass (LP) and highpass (HP) with separate level controls are available. The sockets are normalled, i.e. the signal applied to the LP input is available for the HP input too provided that no plug is inserted into the HP input socket. The level control of the HP input is realized as a polarized input. This means that the signal can be added with the same polarity (+ range) or opposite polarity (- range) compared to the LP input. This feature enables notch (+) and bandpass (-) filter functions too. From our point of view this is the most flexible solution that enables e.g. these functions: Lowpass: the audio signal is fed to the LP input, HP level control is set to zero, LP level control is set to the desired levelHighpass: the audio signal is fed to the LP or HP input, LP level control is set to zero, HP level control is set to the desired level (in this special case it does not matter if positive or negative amplification is chosen with the polarizer control)Lowpass/highpass mix with one audio signal: the audio signal is fed to the LP input, LP and HP level controls are set to the desired levels. special setting 1: if the level controls for LP and HP are set in a way that both levels are identical with the same polarity (i.e. + range of the HP level control) and no or little distortion only one obtains ~ a notch filter (the "~" indicates that the notch is far from beeing perfect, the attenuation in the passband is not as good as for other filters of the A-100 system, look at the frequency response curves at the bottom of this decoment for details)special setting 2: if the level controls for LP and HP are set in a way that both levels are identical with the opposite polarity (i.e. - range of the HP level control) and no or little distortion only one obtains ~ a bandpass filter (the "~"

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New Doepfer A-147-2 Voltage Controlled Delayed LFO

via Doepfer, via PatchPierre.Net

"Module A-147-2 is the successor of the VCLFO A-147 but offers much more features than the predecessor. The module is made of these sub-units:

VCLFO: voltage controlled low frequency oscillator

VCA: voltage controlled amplifier, switchable to voltage controlled polarizer

VC delay unit: voltage controlled linear attack envelope (only one parameter: attack) for delayed LFO operation in combination with the VCA (e.g. delayed vibrato/tremolo)

LFO: The voltage controlled LFO has the waveforms Triangle, Sine, Sawtooth and Rectangle available and features a Reset/Sync input. Triangle/Sine and Rectangle are displayed by means of dual-color LEDs (probably red/green), Sawtooth has a unicolor LED available (probably blue). The output levels are about -4V...+4V for Triangle, Sine and Rectangle. The Sawtooth level is about 0...+8V.
The CV control can be switched to attenuator or polarizer ("CV Mode" switch). In polarizer mode the CV inputs affects the frequency in the reverse manner when the CV control is left from the center position. In the center position CV has no effect and right from the center the control works like a normal attenuator. The frequency range (without external CV) is from about 0,005 Hz (i.e. about 3 minutes per periode) to 200 Hz. In addition a ultra-low mode can be activated by means of an internal jumper. When the ultra-low jumper is set a fixed voltage is connected to the switching contact of the "LFO CV" socket. In polarizer mode of the CV control that way extremely low frequencies (up to one hour period and more) are possible.

VCA: This is a linear VCA that can be switched to "normal" VCA (i.e. kind of a voltage controlled attenuator) or voltage controlled polarizer ("VCA Mode" switch). In the "normal" VCA mode amplification +1 is achieved with about +5V control voltage. In polarizer mode the amplification ranges from about -0.5 (i.e. inverted signal with about 50% level) with 0V CV to +0.5 (i.e. non-inverted signal with about 50% level) with +5V CV. With about +2.5V CV the signal is suppressed. Details about the functioning of a voltage controlled polarizer can be found in the description of the module A-133. In this mode the VCA can be treated also a DC coupled ring modulator (similar to A-114).

The VCA of the A-147-2 has three sockets available: "In" (signal input), "Out" (signal output) and "CV" (control voltage input).

The Triangle Output of the LFO is normalled to the VCA signal input by means of the switching contact of the "VCA In" socket. If another LFO waveform (or any other signal) should be processed by the VCA the corresponding signal has to be patched to the "VCA In" socket. The VCA can be used also independently from the LFO and the Delay CV. In this case the VCA sockets In, Out and CV have to be patched accordingly. The VCA can be used also as waveshaper for the LFO signals (e.g. by patching VCA In and VCA CV to different LFO signals, if necessary via attenuator A-183-1 or offset generator/attenuator A-183-2).

Attack/Delay: The third sub-unit of the module is a simple, voltage controlled envelope generator that has only the parameter "Delay" (or Attack) available. This unit generates a linear increasing voltage that starts from 0V after each Delay Reset until it reaches about +5V. Then the voltage remains at +5V until the next Delay Reset occurs. The inclination or gradient is controlled by the manual Delay control and the Delay control voltage ("Delay CV" input). The waveform is linear, the control scale is exponential. The output voltage is displayed by a unicolor LED (probably orange) and available at the "Delay Out" socket.

The manual Delay control ranges - without external "Delay CV" - from about 5ms (fully CW) up to 2 minutes (fully CCW). By means of an external voltage applied to the "Delay CV" socket this range can be extended. A rising CV shortens the delay time (behaviour like a VCO) !

The Delay output voltage ranges from about 0V to +5V. The rising edge of the gate, clock or trigger signal applied to the "Delay Reset" sockets resets the Delay output voltage to 0 V.

"Delay Out" is normalled to the VCA CV input by means of the switching contact of the "VCA CV" socket and consequently controls the Triangle level provided that no other patch is made. A typical example is the usage of a Gate signal (e.g. from a USB/Midi-to-CV/Gate interface) as Delay Reset. That way a delayed vibrato or tremolo can be realized if the VCA output is patched to the frequency CV input of a VCO (or VCF), or the CV input of a VCA.

But the Delay sub-unit can be used also independently from the LFO and VCA, e.g. as a voltage controlled waveshaper or for other applications where a linear increasing signal with voltage controlled steepness is required."

New ELKA SYNTHEX 2 Website Launched

In case you missed it, see this post back on May 3, announcing the new ELKA SYNTHEX 2 from original SYNTHEX creator, Mario Maggi. Not to be confused with the recently cancelled SYNTHEX re-issue, the SYNTHEX 2 is all digital and has Mario Maggi backing the project. Below are the "preliminary and partial specifications". You'll find the new website here: http://www.synthex.it. Be sure to check out the ELKA SYNTHEX page for some great history.

"Preliminary and partial specifications

Polyphony
16 Voices
Versions
61-note-keyboard
Keyboard-less tabletop
1 Rack Unit expander
Portable expander
Keyboard

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Doepfer Universal AD/DA module

"The picture shows the first prototype of the universal AD/DA module. In principle this module is nothing a clocked AD/processor/memory/DA chain. AD means Analog-to-Digital converter, i.e. the analog voltage (audio or control voltage) is converted into a digital format with 12 bit resolution. The digital signal is processed or delayed by a microcontroller with a large memory and then converted back into the analog voltage by an Digital-to-Analog converter. The prototype has two AD inputs (with attenuator), two clock inputs, 2 pairs of LEDs, and two DA outputs as for certain functions (e.g. voltage controlled bit crusher or waveshaper) two voltages are necessary. The mode is selected by means of 8 buttons and a LC display.

Examples for processing (without using the delay memory): bit crusher, bit exchanger, audio and CV waveshaper, Hz/V-to-V/Oct converter and vice versa, and many more. In principle everything that can be realized by calculating the AD output using certain rules and then converting the result into a voltage by the DA converter.

Examples for processing (with delay memory): clocked audio/CV delay with adjustable memory length between 128 (e.g. for flanger or Karplus/Strong) up to one million (for long audio delays many seconds or even minutes), digital sequencer (i.e. recording/storing/plaing back a CV).

The clock input is used to trigger AD/DA conversion. For audio signal processing the clock has to be in the audio range or beyond (e.g. from a VCO or high speed VCO). For CV processing the clock can be slower.

The final module(s) will probably look different. The prototype is used as a kind of defelopment tool to find out which function are useful. As soon as we made our first experiences and have found out what is possible we will probably start a poll in the A-100 Yahoo group how many different modules with which kind of controls should be released after all. The prototype will be probably shown at the NAMM booth of Analogue Haven in January."

via sequencer.de

EG WaveSHAPER - Pads presets run through

Published on Dec 15, 2018 ElliottGarage

See this post for additional details.

Serge Modular Paperface 2.0 - Official 50th Anniversary Edition

video upload by Serge Modular | Random*Source

"Teo.Hoffmann (https://www.instagram.com/teo.hoffmann/) playing the new Serge Paperface easel - Serge's 2022 redesign of the original 1st generation Serge synthesizer from 1973. Single take recording.

The Paperface Anniversary system is a standalone, externally powered, authentic Serge synthesizer.

Panel 1 (Sequencer):
Serge Gate Sequencer
Enhanced SQP4 Sequencer / Programmer with UP/DOWN, HOLD
Serge Metronomic Clock
Bidirectional Router
Enhanced SQP4 Sequencer / Programmer with UP/DOWN, HOLD
Peak & Trough

Panel 2 (Voice):
Serge Vintage Oscillator 2022, temperature-compensated, 1V/Oct
Serge Vintage Oscillator+ 2022, temperature-compensated, 1V/Oct, with PULSE and PWM
Serge Noise
Smooth & Stepped Generator (SSG)
Dual CV-Pro
Triple Waveshaper (TWS)
Serge 1973 VCF + Balanced Output"

Serge Modular Paperface 2.0 - Rhythm & Stealth


"Exploring the rhythmic side of the Serge Paperface easel - Serge's 2022 redesign of the original 1st generation Serge synthesizer from 1973. Single take recording."

See the Random Source label below for more.

HELIOS

"The Serge HELIOS is a powerful voice panel that brings the raw Paperface oscillator sound to a new level and is the ideal basis for both tonal and experimental sound explorations. Serge's redesign of the 1973 VCOs adds temperature compensation and exceptional tracking over 6+ octaves. The Oscillator+ adds an PULSE OUT with pulse width modulation.

The voice panel comes built and calibrated in a superslim boat and is designed to be powered externally (e.g. with a mobile PSU) - PSU not included."


TEMPO DI ROMA

"TEMPO DI ROMA offers a unique combination of sequencing, programming, switching and logic, that brings Paperface to a new level. The classic GATE sequencer is no longer alone - two 4-step programmers that are also sequencers (with HOLD, RESET, UP/DOWN) can be run independently. Serge's new metronomic Clock is a precise, temperature-stable analog tempo source that can bring any of these sequencers to life. Three Bi-Directional Switches allow complex combinations of the Sequencers (or even audio signals). The bottom switch is special: it includes a Flip-Flop so that with the first trigger, the Switch is turned ON (and stays ON), until another trigger turns it OFF again. An additional FLOP output is also added. Last not least the panel contains a PEAK&TROUGH section. With logic signals, PEAK (max function) acts like an boolean OR, TROUGH (min function) like a boolean AND. However, PEAK&TROUGH can also be used with audio signals or CV.

The sequencer panel comes built and calibrated in a superslim boat and is designed to be powered externally (e.g. with a mobile PSU) - PSU not included."


PARIS-FLASH

"The Serge PARIS-FLASH combines the key Serge modules of the Paperface era, especially slopes and envelopes, into one panel. While it may look like a system primarily designed for CV-Control, it is equally strong in the audio range.

The slopes panel is to be released in SPRING 2023 and will come built and calibrated in a superslim boat and is designed to be powered externally (e.g. with a mobile PSU) - PSU not included."

https://serge-modular.com/paperface

Erica Synths SUPERBOOTH19 Announcements

"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!

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Waldorf M 1.07 RC Update Adds PPG Waveterm Transitions Replay, Additional Filter Modes & More

This one is via an anonymous reader. Full release notes below.

Regarding PPG Waveterm Transitions Reply:

"I always dreamed of PPG Waveterm Transitions replay. So there are they here in M! Now in classic mode one can use the second oscillator as a PCM oscillator and play one of the 64 transitions, saved into internal flash. They could be loaded from the SD Card to the M and used for your patch. So you can make 4 channel Drum Machine with analog and digital VCF on each channel. Or multisample layered patch. And the OSC1 stays free to play its own wavetable. So I am very curious, what you can introduce with this new feature."

"You can load up these old samples and use your M as if you had a PPG Wave + WaveTerm combo."

New filters: Notch 12dB / Oct, LP 24dB/Oct, BP 24 dB/Oct,HP 24 dB/Oct, Notch 24 dB/Oct, Sin Waveshaper + LP 12 dB/Oct, Dual LP/BP 12 db/Oct, BandStop 12 dB/Oct. Almost all of the MicroWave 2 XT's digital filters are now available on the M.

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fricko eurorack modules

Published on Jul 4, 2019 Rick Jelliffe

https://fricko.home.blog

Playlist:

1. Fricko ProPulse Eurorack Synth Module Calibration
2. Conventional ADSR/AR EG cannot do portato
3. Clean Envelope Generator from fricko - portato
4. Two fricko Blip! waveshaper modules driven antiphase
5. Double constant-breadth pulses with dual Blip! Waveshapers from fricko
6. VelocitizerAudioAnimator on scope

Pictured: ProPulse DIY Eurorack module & simulation of the logic gates for the ARP ProSoloist pulse waveform generator.

"fricko unique eurorack pcb+panels

PCB/Panel combinations for analogue synthesizer modules exploring new areas of dynamic waveshaping and dynamic performance

Unique function, new ideas, new designs, new patches, new sounds!
Friendly on rack space: 4 and/or 6 HP panels and 30 to 70 mm deep!
Convenient for DIYers: assemble in a single evening, through-hole, reasonable space between components, test points, no expensive or rare parts, all analogue
What you will get: 1 x PCB (unpopulated), 1x panel (PCB material), build information.

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Modular Synthesizer Basics - Featuring the Erica Synths Das Kleine Fusion System and Zen Delay!

Synth Diy Guy

Website: https://www.quincasmoreira.com/

Patreon: https://www.patreon.com/quincas

"Are you just getting started with modular? Or maybe there are some basic concepts you still haven't quite grasped? Here's a nice long class where I explain the basics very clearly, using the wonderful vacuum tube based Das Kleine Fusion System by Erica Synths! Also Featuring the Zen Delay!"

Index:

Start 00:00
VCO 1:01
Triangle Wave 1:37
Frequency 1:52
VCA 3:11
Audio Signals 3:58
Control Voltage 4:29
LFO 4:39
Offset 5:06
Pulse Wave 5:44
Overtones 6:16
Pulse Width Modulation 7:04
Square Wave 7:43
Saw Wave 8:53
SUB oscillator 10:46
Color switch 11:02
Detune 12:10
Tube Crunch 13:19
The Mixer 14:24
Normalization 14:39
Drone plus voice patch 16:07
Buffered Multiple 16:34
VCO SYNC 19:39
Frequency Modulation 22:15
Attenuators 22:51
Exponential FM 24:36
Expo Converter 25:00
VCO Audio In 26:16
Gate and other Logic Signals 27:30
Envelope Generators 28:19
EG Looping 29:51
Legatto 31:41
EG as LFO 32:56
VCF (Filter) 35:54
CV Recorder 42:25
VCA Waveshaper Ringmod 48:02
Ring Mod 54:43
White Noise 56:53
Sample and Hold 58:30
Generative 1:02:53
CV Decay 1:03:12
End of Cycle 1:03:20
Random Clock 1:03:43
Duophonic patches 1:05:12

4ms Shaped Dual EnvVCA, Dual EnvVCA & EnvVCA Demo

video upload by 4ms Company

"Featuring the Shaped Dual EnvVCA, Rick Batyr runs all of the EnvVCA units, along with our other new modules through the paces.
------------------
Shaped Dual EnVCA
https://4mscompany.com/shapedenv

The Shaped Dual EnvVCA is a two-channel analog envelope generator with variable waveshaping and a stereo linear VCA. Unlike conventional analog envelope modules, the waveform of each envelope can be controlled with a slider or CV without changing the envelope timing. With a wide time range from an hour to 2.5kHz, and a plethora of CV inputs and attenuverters, it can be used as an LFO, audio-rate oscillator, slew limiter, waveshaper, ASR/ADSR/complex EG, independent audio/CV VCA, envelope follower, sidechain processor, and general utility module. Each channel has dedicated linear outputs plus attenuverters and offset controls for the variable waveshape outputs, making it an ideal modulation source and stereo VCA. 100% analog, 20HP, $339

Dual EnvVCA
https://4mscompany.com/dualenv

The Dual EnvVCA is a two-channel analog linear envelope generator with two fully independent low-noise exponential VCAs. With time ranges from 30 minutes to 8kHz, it can be used as an LFO, slew limiter, ASR/ADSR complex EG, audio-rate oscillator, stereo audio/CV VCA, envelope follower, sidechain processor, and general utility module. The outputs can be attenuated, inverted, and offset without disrupting the VCA, making it a versatile modulation source. 100% analog, 16HP, $225

EnvVCA
https://4mscompany.com/envvca

The EnvVCA is compact analog envelope generator with a built-in low-noise exponential VCA. It’s a perfect companion to any VCO, whether you trigger it or self-cycle, and/or use the envelope output to modulate something else. With a wide time range from 30 minutes to 10kHz, it can be used as an LFO, slew limiter, audio or CV VCA, ASR/ADSR envelope generator, audio-rate oscillator, and more. 100% analog, 8HP, $159
------------------
http://4mscompany.com/stores.php
https://4mscompany.com/ENV
https://4mscompany.com/DEV
https://4mscompany.com/SHEV
https://www.instagram.com/rick_batyr_..."

「SLEDGEHAMMER」by SYNTHFOX ~overview~

video by SYNTHFOX Channel

"Overviewing my newest module, SLEDGEHAMMER. This is a wicked dynamics and harmonics processor with huge feedback play capabilities!"

SYNTHFOX Reverb Shop

"Meet SLEDGEHAMMER, a vactrol gate core experimental dynamics and harmonics processor. This module serves many needs, such as mixdown, wavefolding, waveshaping, distortion, VCA, suboctave generation, and much more. The three signal inputs - one with a dedicated thru-zero VCA, and four differently processed outputs provide endless tonal possibilities and a core module for creative patch-programming.

SLEDGEHAMMER is intended for heavy feedback usage. The INPUTS section mixes down three signals (audio or CV) for further processing. The first and second inputs have dedicated attenuators. The third input is special: it is a voltage controlled crossfader that fades between the negative and positive copy of the input signal. The FOLD output is normalized to input 2, and the SHARP output is normalized to input 3, so patching audio to input 1 and adjusting other inputs' volumes already creates a self-patched feedback loop.

The heart of this module is a vactrol-based dynamics processor ('gate') similar to the widely known low pass gates. It processes the mixdown of the three inputs from the INPUTS section: the big LEVEL knob, two Level CV (LCV) inputs and the PING input control both the amplitude and the slight filtering of the signal: from quiet and dark to loud and bright. The first LCV input has a dedicated attenuverter; the second one has a simple attenuator. The PING input expects a gate, and upon receiving one, will strike the gate with a sharp decay-only envelope. This input has a simple passive circuit behind it, which can be creatively exploited: for example, striking it with stepped voltages, e.g. a S&H output, will make the circuit skip some strikes, and the remaining strikes will have different velocity. The DULL / VIVID switch on the left chooses the type of the response: the DULL setting yields daker, quieter tones, while the BRIGHT setting makes the gate sound more open and loud. Both modes are useful in different applications.

Finally, the output of the gate core is passed through different harmonic processor to create the four SLEDGEHAMMER outputs: GATE, FOLD, BEND and SHARP.

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Massive Eurorack Setup for Sale

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

via this auction

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Yamaha CS80 Voice Card

via this auction

"Will also work in the CS50 and CS60 synths. These voice cards are like gold dust, contains many ultra rare custom Yamaha IC's:
1x IG00151 VCA
1x IG00159 AMP EG
1x IG00153 VCO
1x IG00158 WAVESHAPER
1x IG00150 SUB OSC
2x IG00156 VCF
1x IG00152 VCF EG"

1979 Yamaha CS20M - 15 patches demo

video by Valmont

"8 user memory slots (!!!), 2 VCOs + VCA Sine, Multimode VCF, 2 EG, 1 LFO (Up to 100Hz!), Portamento and a bunch of parallel modulations.
It shares almost all the same chips as found in all the CS Serie (From the tiny CS5 to the huge CS80). Inside you can find: IG00150 LFO, IG00151 VCA, IG00153 VCO (Pulse/Saw), IG00156 VCF (HP/BP/LP), IG00158 Waveshaper (Sine/Tri) and the IG00159 EG.
All these chips cost a fortune now, I hope none breaks (: It's not like CEMs/SSMs were you can find reeditions, these parts were specially made for the CS and there are not many anymore.
Tho my unit has a noisy VCA distortion, that's the high frequency buzz you can hear. I'll service it soon! Notice how straight and thin this synth sounds - it is extremely stable, and thanks its memories, it seems like the perfect synth for live gigs.
The filter reminds me of the Oberheim SEM, but it's less bright, as Yamaha's engineers set the max cutoff frequency to... 7500Hz. So we get the same behavior as in some Arp 2600 revisions: a restrained filter spectrum! Tho this doesn't make the synth bad at all ;)
I'll also add the fact that this synth is probably of the best build quality I have ever seen. Super heavy, big comfy controls. Inside everything is made very cleverly, top quality electronics. Yamaha also explained the whole synth circuits in the harware manual, I mean... They really described how the VCOs work, the memory encoding, etc... (http://www.midimanuals.com/manuals/ya...​)
And despite being 42 years old, it is stable as hell, just like a brand new synth from these days. Japanese engineers were really good... Too good maybe ;)

0:00​ - Fonk Bass
0:13​ - 2-Lead
0:24​ - Synth 1
0:33​ - Synth 2
0:42​ - Multimode Bass
0:54​ - Saw Lead
1:10​ - Resonance
1:21​ - Moog-Like 1
1:29​ - Moog-Like 2
1:37​ - SnH
1:51​ - BP Arp
1:57​ - LP Arp
2:07​ - PW Bass
2:19​ - Chord Lead
2:41​ - HP Lead"