MATRIXSYNTH

Extended Easel

Published on Jul 7, 2019 Todd Barton

"exploring extensions to my Easel: Makenoise Morphagene, Intellijel Planar 2, TC Electronic Ditto x4 . . ."

MS-101, Moog One, Prophet Xl, OMD Electricity

Published on Jul 7, 2019 Sounds From The Shed

"Sequenced this one with the Squarp Pyramid. 101 - Bass. Mono Station - Arp/lead, Prophet Xl Moog one Strings, Techno System and DJS-100 percussion."

Custom KORG Polysix - Vintage Analog Synthesizer

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This one was spotted and sent in via M Me.

"Panel seems to be a polycarbonate film."

One of the newer sticker type panels found on some new synths. Likely the original panel was scratched up.

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Quadrature Modulator, analog synthesizer module 3rdWorldRack

Published on Jul 7, 2019 Sbranvlztronics

"The Quadrature Modulator comprises a Quadrature VCO (Yusynth VCLFO) and a "Dome Filter" (from J. Haible's Frequency Shifter)

The VCO portion has 3 potentiometers (coarse and fine frequency tuning and modulation CV attenuation), one CV input, 4 outputs and 4 LED indicators.

The dome filter section has one input and two outputs. The outputs are 90º phase shifted from each other. The video shows the waveforms from the VCO and Dome Filter on oscilloscope.

Differences from Yusynth Quadrature VCLFO are the capacitor value (1nF instead of 10nF), and changes in the freq control (fine tuning pot, reduction of the CV input resistor value).

It can operate at audio and sub audio ranges (0.2 to 4000 Hz approximately), but 1V/8ª tracking is only marginal (~2 octaves).

There is no significant differences in the dome filter circuit.

Some examples shown in the video:
Quadrature VCO controlling 4 VCOs, 1V/8ª CV for the Quadrature VCO input coming from the CV Quantizer.*
Frequency Shifter patch using the Quadrature Modulator and two Ring Modulators.*
Adding FM CV to Quatradure VCO (from the Arduino Clock Divider Logic Thing Octal DAC).*

Thanks for watching"

Sequential Circuits Prophet 600 SN 4532

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"The successor to the venerable Sequential Circuits Prophet V - the lighter, leaner, preset-weilding, MIDI capable Prophet 600! Seen here in clean, original condition and just back from a fresh servicing.

All keys works perfectly alone with all the pots, switches, wheels, and jacks. The only detectable "issue" on this bad boy is the no. [4] button on the membrane needs to be pressed harder than the others. The rest of the membrane works fantastically well. New membranes are available and cost about $80. Aside from a little superficial cosmetic corrosion on the casing screws and MIDI plug rims, it's ready to go!"

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Yamaha CS-70M (vintage analogue polyphonic)

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Yamaha CS-01 Vintage Analogue Mono Synth SN 35600 w/ Original Owners Manual

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Skookum Anookum Mutable Instruments Anushri Monosynth & Drum Synth

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"Anookum Analog Monosynth and built-in drum machine. Clone of Mutable Instruments Anushri. Excellent condition. All metal case construction. Faceplate is compatible with Eurorack cases. Can be modded to fit by removing rear MIDI/Audio plugs from PCB. Supplied with power adapter.

Anushri is a monophonic synthesizer with an all-analog signal path, paired with a lo-fi digital drum synthesizer. These two sections are controlled by an on-board sequencer/arpeggiator, featuring generative drum pattern sequencing. Anushri is open to the modular world thanks to its analog patching area."

Desktop port of eurorack. See this post for the grey faced eurorack version.

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