Dave Smith Instruments Evolver Desktop Synthesizer SN 00699

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Futuresonus Parva Polyphonic Desktop Synthesizer

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Malekko Manther Desktop Analog Synthesizer + Sequencer

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Simmons SDS EPB Eprom Blower Burner

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"This item has been fully serviced and tested. Use this device to burn samples onto EPROMs for your Simmons SDS7 SDS1 SDS series drum synths and possibly other EPROM based drum machines. If you've used this successfully with other drum machines, please let us know. EPROMs not included.

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Vintage Heathkit Audio Scope AD-1013 Quadraphonic Oscilloscope and Oscillator (1970's)

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via this Reverb listing

Pic of the inside below.

"Heathkit AD-1013 Quadraphonic Oscilloscope | Rare 1970s Vintage | Fully Functional & Beautiful

Up for sale is a rare and stunning Heathkit AD-1013 quadraphonic oscilloscope from the 1970s. This piece is fully functional and in remarkably clean condition, especially considering it’s over 50 years old.

The AD-1013 is a unique vintage unit designed for visualizing sound in both stereo and 4-channel quadraphonic modes—perfect for adding immersive, retro visuals to your synth setup, studio, or hi-fi system. It also features a built-in sine wave oscillator (20Hz to 20kHz), making it useful for testing or generating signals right out of the box.

Functionally:

• All features tested and working flawlessly

• Bright, sharp CRT trace

• Stereo + quadraphonic display modes

• Built-in sine wave generator (20Hz–20kHz)

Cosmetically:

• Front panel is clean and vibrant with no major wear

• Chrome accents are shiny with only minimal spotting

• Original knobs are in fantastic condition

• Wood cover has a few light marks but is smooth and attractive

• Reticule and brand sticker are bright and intact

• Black side panels complete the sleek vintage look

This is an incredible and rare unit that delivers both function and serious retro vibe. Whether you’re after vintage test gear, synth visuals, or a killer display piece for your studio, the AD-1013 is the real deal."

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Korg MS-20 Mini Semi-Modular Analog Synthesizer SN 009643

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Roland Jupiter 6 Polyphonic Analogue Synthesizer w/ Hard Case

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Waldorf Quantum 61-Key Hybrid Synthesizer

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Studio no. 2 on Stereo Dyads | Performance breakdown with Francesco Gennari

video upload by Frap Tools

"In this new episode, ‪@francescogennarimusic‬ plays his new étude for Eurorack synthesizer and breaks it down. It is focused on "stereo dyads", i.e., chords of two notes only that are spaced across the stereo field. In this video, he will guide us through his compositional approach (which begins on the piano) and the techniques he used to bring it all together, which include using filters as oscillators and modulating stomp box effects through the USTA sequencer."

Time stamps:
00:00 Introduction
00:32 Modular Performance
04:16 Piano Performance
06:00 Track Structure
06:33 Usta in Song Mode to repeat patterns.
07:07 First voice: NTO + Cunsa playing the upper melody.
08:49 Second voice: Stereo Dyads with Cunsa
10:22 Distorted Layer
11:05 Third voice: Bass
12:08 Effects: triggering the Empress Zoia through the Usta sequencer.

808 Kick + | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to patch a clasic 808 style kick drum and then make it weird, all within the Angle Grinder."