WMD Synchrodyne Expand Eurorack Module

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via this auction - learn how to sell on eBay here
Perfect Circuit Audio (RSS)

"This is the WMD Synchrodyne Expand, they went a little crazy with it. But we figured that if you can grasp the original, you're the type that always wants to go deeper. So lets take this plunge together as we attempt to explain what it all means.

Concept

The Synchrodyne by itself is capable of a great deal, containing several modules in one, prepatched internally to create a vibrant range of sounds. It is designed to be powerful and extremely dynamic when minimally patched, but when patch cords start flying around to be open and experimental. You may also use many of the parts of the Synchrodyne and Expand separately in various parts of your patches. The open architecture allows it to do many jobs, even small ones.

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WMD PDO MKII MK2 Phase Displacement Oscillator Eurorack Module

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Perfect Circuit Audio (RSS)

"This hybrid VCO has all the feel of an analog VCO but with the benefits of digital waveshaping.

The PDO2 is a re-release of the WMD Phase Displacement Oscillator as a 16 HP 9 knob variant with more finger space, better Phase Input routing and reduced power consumption. This new version can also be used to upgrade existing PDOs to larger panels.

The PDO2 exists to utilize the phenomenon of Phase Modulation (PM). This allows for the relative phase difference of its outputs to be set or modulated, producing very interesting sounds. The result is similar to Frequency Modulation (FM) but affects the output to a greater degree without affecting the stability of the initial frequency.

PM has the same benefits of quadrature filters/sine wave generators and greatly exceeds their capabilities at audio rate modulations. PM is highly useful for for creating metallic and bell tones and very controlled harmonic interactions.

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Vintage Multivox Basky II Synth Bass Pedal SN 265295

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via this auction

Pics of the inside below.

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YAMAHA CS-10

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via this auction - learn how to sell on eBay here
Rhythm Active (RSS)

Sequential Circuits Prophet VS - Fully Serviced, New Sensors & OLED Screen

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via this auction - learn how to sell on eBay here

"Just been fully serviced by James Walker in Stoke, has had a stunning new OLED display fitted and new after touch sensors, also has the rare RAM cartridge that allows you to build you own waves/vector tables.

The unit is in excellent cosmetic condition with only minor makings to the edges, has the latest OS V1.2, the factory sounds uploaded and comes with a copy of the manual..."

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Roland Jupiter 6 with Europa Upgrade SN 322415

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sir_analog (RSS)

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Arp Odyssey MK1 2800 Analogue Synthesiser SN 282795

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sir_analog (RSS)

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Knobcon Rehearsal

TheSynthFreq & MsMotif6 prep.

via Suit & Tie Guy on Facebook

Knobcon starts tomorrow.

KORG Polysix "Primabella"

"(c) 2013 vintage demo track by RetroSound

all sounds: KORG Polysix analog Synthesizer (1982)
drums: LinnDrum
recording: multi-track without Midi
fx: a bit delay and reverb"

via Marko Ettlich on The MATRIXSYNTH Lounge

nonlinearcircuits Neuron - Difference rectifier (papernoise panel)

"A DIY module combining a dual analog neuron and a dual differential rectifier circuit

The Difference Rectifier has 4 inputs (two + & two -) and two outputs. The Neuron has two inputs and one output. There is a pad labelled 'ext' where extra inputs can be added if desired (use a 100k resistor attached to the jack).

All inputs for both circuits can be wired to attenuating pots if required. The two pots on the PCB are the critical Offset and Invert controls for the Neuron. The Offset is slightly modded from the previous Double Neuron PCB as it now ranges between +V and -V and its effect is halved by the 200k resistor to give greater useful range.
Schematics and demos - Difference Rectifier and Neuron
Build manual pdf"

Additional details & links on nonlinearcicuits here.