GEM (GENERAL ELECTRO MUSIC) PK 4900 1978 SN 0482091

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Demo in the listing previously posted here.

"Rare Italian beauty from the seventies, a great string machine/brass machine sporting a stunning mono synthesizer section with an interesting filter and portamento. Used by Radiohead on Kid A. The keyboard is in very good cosmetic and working conditions.

It includes different sections: Instastrings (strings) Polyphonic (Polytron) and preset monophonic (Monotron).

Strings section includes violas & violins. Separate outputs (stereo & mono) + sustain.

The polyphonic section includes: Brass I, Brass II, Horns, Chorus, + Vibrato & Delay effect.

Monophonic includes the following presets: Synthy Wah, Reed, Funky Solo, Jazz Pulse, Pop Synthy, Trombone, Trumpet, Pan flute, Mod, SEC, + Chorus & Auto Bender effect.

Volume control, tune & portamento section."

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Yamaha SY35

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Yamaha CS6X

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Korg Minilogue Polyphonic Analog Synthesizer

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"This Korg Minlogue unit has also a 'Custom Professional Angelic Skinned Surface'; 3M-patented adhesive allowing for secure application and safe removal."

"When it comes to traditional subtractive analog synthesis with modern sophistication, the Korg minilogue analog polyphonic synthesizer delivers. It starts with a pair of highly shapable VCOs, which you can shape with a switchable 2-/4-pole lowpass filter, and there's plenty of modulation to go around. At the same time, you can store up to 200 settings, and there are 100 killer presets onboard to fuel your creativity. There's also a built-in tape-style delay effect and an OLED oscilloscope display — something we've never seen on a hardware synth. And that's just the beginning. Between the minilogue's Voice Modes and the onboard 16-step sequencer, you'll be amazed by the sounds you can come up with."

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1984 Casio CSM-1 Digital Sound Module

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via this auction, also on Reverb

You can find an odd demo of one here, and pics of the original box here.

Preset machine. "You essentially have 3 different programmable voice slots on three seperate MIDI channels as well as a fourth for either drums or a 4th patch (yes, it’s multitimbral). The drums can actually sync to MIDI clock. You have indidividual sliders for each voice and plenty of patches to work with!"

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Roland Juno-6 Analog Keyboard Synthesizer SN 365490

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"It is in near flawless new condition. The only thing that I can see that makes this keyboard not perfect is a silver knob has broken off, which can be found on ebay for $13 to fix it. look at the pic, it is the "MODE" "UP UP & DOWN DOWN" switch....this could also be fixed by gluing a new piece on the switch, the switch still works, just needs something to flick it with...pretty easy fix if your even barely handy."

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1970s Roland SH-3A Vintage Analog Synthesizer SN 493xxx

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"Roland's first non-preset based synth, the SH-3A features two LFOs and is unique for offering five different footings with mixable waveforms, as well as both subtractive and additive synthesis. The single oscillator SH-3A has an incredible range of pure analog sounds used by the likes of Blondie and Vangelis, and with the transistorized ladder-filter, the SH-3A can achieve very Moog-like sounds.

All features of this vintage synth work as they should and the keyboard is remarkably clean. All of the original knobs and sliders are intact, barring the Release slider, and the graphics are well preserved. This particular SH-3A was produced for the Japanese market, indicated by the Roland badge with green Japanese text underneath.

The synth comes complete with the original latching lid."

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1980s Yamaha SK-20 Symphonic Ensemble SN 1210

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"This Yamaha boasts dedicated synthesizer, organ, and string sections that can be independently mixed together. Featuring a five octave range, the SK-20 also includes a Leslie simulator (with dedicated output), vibrato, attack and sustain rocker switches, a slider for 'brilliance' and a one-octave transpose switch. The keyboard was also one of the first to utilize a form of Yamaha's FM technology.

The Organ section offers a full range of stop levers from 1' to 16', percussion levers with adjustable decay, and controls for overall sustain, brilliance and decay. Very B3-esque in its tonal intent, the organ can also be augmented with Vibrato and Tremolo. The Preset String section is simple yet lush, and arguably the most desirable subset of this vintage keyboard.

The Poly-Synth section is a 7-note polyphonic synthesizer with basic filter, pitch, envelope, and portamento controls. It features two (detunable) oscillators per voice, making it ideal for thick pads. This section features a built-in sustain and the Tremolo and Ensemble chorus effects also apply to this section. Cosmetically, this SK-20 is an extremely well-kept example with pristine graphics and virtually no wear to report, retaining all of the original rubber feet, slider caps and knobs.

The original Yamaha-branded hardshell case is included."

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Smoo Synthesizer from Teensy 4.1

video upload by Bert Jerred

"I made another thing! Here's a sound demo.
And here's more things I do: chj3.com
And here's a free soundfont I made from this device: https://www.polyphone-soundfonts.com/...
And here's where you can get sounds and music for stuff: https://frozenfellow.itch.io/"

Soma Enner Synth Tutorial Lesson 6: Delay Section

video upload by EthanJamesMusic

"This is a tutorials series for anyone who wants to learn how to use the Soma Labs Enner body patching synthesizer electronic instrument. If I get a response to this series, I will try to break things down into small videos that are easy to mentally digest and apply to your own electronic music. We will be exploring both east coast tonal and west coast avant-garde uses of the synthesizer. The Enner is especially good at ambience, noise, and soundscapes for film music.
This sixth video will teach some mainstream and experimental uses of the delay section and show you some of what's possible to do only using your fingers. Please leave a comment with any questions or requests and a like if this was helpful."

EthanJamesMusic Soma Enner Synth Tutorials