1cm of original wire from a Ems Synthi 100 for Auction

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via this auction

"1cm of signal wire from an original EMS Synthi 100 from the 1970s!

Not working. This is approx 1cm of original wire only. Nothing else is included.
It does not work or do anything.
Various colours available on request.
I have miles and miles of spare wire if you want more."

That is Awss. Just look at it. Tiny little bit of synth awesomeness.

Plankton Electronics Releases The Earwig Rectifying Mixer Eurorack Module

via Plankton Electronics

"The Earwig is a rectifying mixer. The core of each channel are two half wave rectifiers and one full wave rectifier. There is also gain, pre and post-rectifier bias and an inverter amp. 2 CV bias inputs are provided to modulate the signal. Each channel accepts audio and CV signals. Available at the store as a modular kit or fully assembled.

HOW IT WORKS

The input signal passes through a first stage of gain and bias. This stage is used to shape the signal at the next stage, the rectifier. The bias input is very useful to modulate the signal here and create changing patterns after the rectifier. The rectifier has 4 positions: bypass, positive wave inverted, negative wave inverted & full wave inverted. With the positive wave inverted position only the signal that stays above 0 volts passes to the other side. The result is inverted. At the 3rd position, only the negative signal, everything below 0, passes through. And again it’s inverted. At the last position the positive voltage keeps the same, and the negative is inverted, so if we input a sine wave the result is an “m” shaped wave. The result is inverted again.

After this stage there is an inverter switch, so we can keep the signal as it is or invert it.

Finally we have another bias stage. This stage let’s us to move the rectified signal again to the 0 point and modulate it. The channel output is connected here directly.

The mix pots attenuates the signal and mix it between the 2 channels, summing and subtracting the 2 channels.

It’s important to understand that the module is not AC coupled. This means that it works for audio and CV signals. So when an audio signal is rectified it will be centered in the 0V range. The second bias potentiometer is useful for achieve this.

When connecting a signal to the “BIAS” inputs it is useful to attenuate it previously to avoid saturating the amp. the module does not have attenuators."

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Synthrotek 308 Eurorack Distortion Module SYNTH DEMO

Published on Nov 14, 2014 synthrotek

http://store.synthrotek.com/308_Euror...

"Get ready for the bright lights of the colosseum!

We've taken our rock-solid RAT clone, squeezed it into a Eurorack module and added CV control over Gain. The 308 will take your playing to new heights with tremolo and other distortion modulation techniques.

Features:
3 controls - Tone, Filter, and Drive - to customize your tone. Tone sets the brightness level, Filter dials in the high frequency response, and Drive determines the signal gain.
4 Diode Settings - An on-board 4PST DIP Switch selects between 4 different clipping diodes to drastically alter your sound. Turn on the stock version 1N4148s, LEDs, Germanium diodes, or none at all with flick of a little switch.
Vintage Tone - The PCB is designed from the original RAT tone IC, the LM308 single op amp.
Control Voltage CV Input
Guitar AND Modular - Adjust the input impedance with a trim pot.
Plug your guitar in using Circuit Abbey's Axis module.
4hp
Current draw: 10mA on the positive rail"

Synthrotek Eurorack 308 FULL Modular SYNTH DEMO with Drums


Synthrotek 308 Eurorack Distortion Module GUITAR Distortion DEMO

Livewire Chaos Computer, Pittsburgh Phase Shifter eurorack patch

Published on Nov 14, 2014 bigcitymusic

"A Chaos Computer pattern is generated every time the melody sequence changes.
The generated Chaos Computer pattern controls the 4ms VCA modulation matrix which determines the patches applied filter, envelope and phase shifter modulation.

Sawtooth waves to MMF-6 filter
MMF-6 filter to Pittsburgh Phase Shifter
Melody Mill to gate Livewire Chaos Computer
Livewire Chaos Computer to 4ms VCA Matrix (mod matrix)
Cwejman CTG-VC to 4ms VCA channel A to MMF-6 cutoff
4ms Quad Pingable LFO to 4ms VCA Matrix channel B to CTG-VC attack
4ms Quad Pingable LFO to 4ms VCA Matrix channel C to PIttsburgh Phase Shifter Frequency"

http://bigcitymusic.com/

STG .COM sub-octave sub-oscillator eurorack patch

Published on Nov 14, 2014 bigcitymusic

"Here’s a patch demonstrating the use of STG Soundlabs .COM as a 'PWM and Suboctave' divider network to bring out sub-octaves from a singular sound source. This .COM configuration gives the sense that multiple oscillators are being used."

http://bigcitymusic.com/

Being Boiled, sequenced on a Pi with 60FPS waveform display

Published on Nov 14, 2014 Pi Synth

"I just eliminated the iPad from my STEM kit by integrating the M3000 Oscillotron code - or a tweaked, more optimized version of it - into PIANA, so it has oscilloscope functionality."

Doepfer A105 24 dB SSM Low Pass Filter Modulation Demonstration

Published on Nov 14, 2014 Raul's World of Synths

"A continued exploration of the Doepfer A105 24 dB SSM Low Pass Filter.This time we experiment with a few modulation sources. A short demo of using the filter in self oscillation is included. Sound and Video by Raul Pena."

All parts in the tutorial series:

Arp 2600 Rare Vintage Synthesizer with 4012 Moog Filter + Keyboard

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

via this auction

"For sale is a rare Arp 2600 synthesizer with keyboard included. It's in excellent shape & FULLY FUNCTIONAL, just recently serviced by a top bay area tech, including tightening up keyboard connector cable, cleaning keyboard buss bar, cleaning sliders, etc. This is the one to get! It will serve you well for many years, don't risk paying a fortune for one in unknown condition. It also has the awesome sounding 4012 Moog Filter which later 2600's don't have as they were sued by Moog over the design. Also has original 4027-1 oscillators. All original, only modification is 3 prong power cable so you can use a standard power cable rather than the obscure oval one. Only other thing to mention is two side latches on the main module & one on the keyboard are broken, as to be expected with age. Otherwise it's complete, looks great for its age, a few scruffs/scratches/tears here & there, but front face is mostly clean & letters/graphics are crisp & easy to read. Includes power cable & keyboard connector cable. The tone on this is a monster, amazing sound like only a 2600 can have...

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Marion Systems ProSynth by Tom Oberheim

Published on Nov 14, 2014 SSM Curtis

"stepping through some patches"

Marksone by Play Cosmetology Career

"Tappin' lounge, hop, and old school noise for a mellow tip

1 synth, 1 sequencer, 1 drum machine, 2 effects, Roland SH-5, Arturia BeatStep and Korg Electribe ER1 + QuadraVerb and Synth Wah

The bass is the ER1, the distorted stuff is a Digitech Synth Wah with the ER1 & SH-5 at various levels, switching between it's effects, most of the major tone changes, especially the drastic ones are the synth wah, the sort of laid back synth parts a little past half way are the BeatStep knobs while it is paused, so silky sometimes"