Korg X-911 Guitar Synthesizer SN 271522

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via this listing

Additional Perfect Circuit listings

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Bristronica 25 - Circle Instruments - the Circle Guitar & MIDI Controller

video upload by Stromkult

"Join us at Bristronica 2025 as we explore the innovative Circle Guitar with Anthony from Circle Instruments. Discover how this self-strumming, MIDI-enabled guitar opens up new creative possibilities ."

https://circleinstruments.com/

"The player can sequence the wheel's movement with a DAW or MIDI controller such as the Morningstar MC6 Pro and MC8 Pro. All external MIDI-enabled devices and effects can be synced to the wheel's speed to adjust dynamically together."


video uploads by Circle Instruments

Playlist:

1. Circle Guitar at Distillery 2 - Episode 2 - Medley
2. An introduction to Circle Guitar
3. Circle Guitar at Distillery 2 - Episode 1 - Theme Tune
4. Circle Guitar - Promo

Introducing Ghosts by Kintone

video upload by Kinotone

"Ghosts is a 6-voice physical modeling effect and instrument."



via Kintone

Ghosts

$399

Chordal Resonator

Ghosts is a 6-voice physical modeling effect and instrument.

Excite high-fidelity strings, tubes, and bars to conjure resonant objects and acoustic environments: a blooming cello, a playful xylophone. From organic realism to spectral fantasy.

Retune the voices to preset chords — including custom chords and microtonal scales. Connect a MIDI keyboard for polyphonic play and the full spectrum of its synthesis engine.

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TronixSynth SpaceAxe Guitar-Like Synth With Touch Sensor Fretboard

video upload by TronixSynth

"Play it like a guitar with touch sensor fretboard and photocell light-Theremin.
Pitch knob, change keys, select scales and octaves."

EMS Synthi Hi-Fli - The Coolest Guitar Pedal Ever?

video upload by foleytronics fx repair

"EMS Synthi Hi-Fli with Dan:" The Rarest Guitar Effect Ever: EMS Synthi Hi-Fli

Roland GR-500 GS-500 Guitar Synthesizer External Synth With ARP Odyssey

video upload by WayneJoness

https://gr300.com/GR-500.html

"Roland GR-500 GS-500 Guitar Synthesizer External Synth With ARP Odyssey

This video details using the Roland GR-500 guitar synthesizer with the ARP Odyssey analog synthesizer."

Extraterrestrial guitar thing

video upload by Love Hultén

"Extraterrestrial guitar thing made for a client"

Casio DG-20 Digital Guitar Synthesizer + Controller

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via this listing

Additional Perfect Circuit listings

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Korg X-911 Analog Guitar Synthesizer Effects Unit w/ Original Box & Japanese Panel Overlay SN 273695

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

via this eBay listing

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SynthAxe Demo - Full Video #sythnaxe #guitar #synth #music

video upload by natr0n

via Wikipedia

"The SynthAxe is a fretted, guitar-like MIDI controller, created by Bill Aitken, Mike Dixon, and Tony Sedivy and manufactured in England in 1985. It is a musical instrument that uses electronic synthesizers to produce sound and is controlled through the use of an arm resembling the neck of a guitar in form and in use. Its name comes from the words synthesizer and axe, a slang term meaning a guitar in rock music. The system was developed as a joint venture funded by Richard Branson's Virgin Group.

The SynthAxe itself has no internal sound source; it is purely a controller and needs synthesizers to produce sound.[1] The neck of the instrument is angled upwards from the body, and there are two independent sets of strings.

The fretboard is continuously scanned and sends signals to synthesizers which produce the sound. The left set determine the pitch played, through contact with the frets on the neck and by sensing the side-to-side bending of the string. The right set of strings are velocity sensitive; these strings can be plucked, strummed or damped in the same manner as a guitar. A keyboard made up of nine keys can also be used to trigger notes instead of the strings.[2] Design of the key toggles was done by the late David Fowler, at the time trading under BJ Hopkins Injection and toolmaking, in Littleworth, Oxford.

An electronic tremolo bar (the 'electronic wang arm') can be used for standard whammy bar effects, or can be redefined to produce different MIDI output such as filter cutoffs or volume.[3]

When originally produced, the SynthAxe was priced at £10,000[4][5] (approximately $13,000) and eventually sold for about £6,000. The instrument was built from aerospace and military grade hardware, and was such a sophisticated and expensive piece of machinery that few were sold, making it difficult to keep the company afloat. In or around 1986, Virgin Games took over the distribution but let it go after a couple of years.

Fewer than 100 SynthAxes were made,[6] and it is difficult to locate used units. Most musicians who desire a MIDI guitar controller often use other alternatives, such as Roland or Axon systems that can convert a guitar's output to MIDI via 13-pin cables and outboard devices or older systems such as the Roland GR-500."

12 String Guitar Drones | Make Noise

video upload by MAKEN0ISE

"Making a guitar drone Reel with the Landscape Ferrous!

Download the Reel here: https://freesound.org/people/makenois...

Send sounds made with this Reel to walker at makenoisemusic dot com if you would like them to be integrated into a continuing iterative music project!

Ferrous is a collaboration between Landscape and Evicshen:
https://www.landscape.fm/ferrous
https://evicshen.com/
/ ch4p9qcdmei

http://www.makenoisemusic.com"

WoFi Jam 09 – Live Looping with Guitar & WoFi FX (by Ilian)

video upload by Kiviak Instruments

"Ilian picks up where he left off, turning the WoFi into a live looping station once again. Direct guitar input, sliced and rendered through the WoFi’s internal tools. He plays with sequences, sound layering, and FX tweaking in real time.

This one’s all about feel, gesture, and reactivity — showing how the WoFi can reshape even the most familiar sounds into something new."

WoFi Jam 08 – Guitar Textures & Live Tweaks (by Ilian)

video upload by Kiviak Instruments

"In this jam, Ilian plugs his guitar straight into the WoFi and explores long release envelopes, subtle textures, and evolving layers.
No synths — just six strings, a bit of dirt, and the WoFi’s raw sampling power.

More than a sampler, here the WoFi becomes a live looper, a sound design playground, and an ambient companion.
Minimal setup, maximum vibe."

Korg X-911 X911 Guitar Synthesizer SN 271636

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

via this eBay listing

"The Korg X-911 is a very underestimated synth. What it was intended to be, was a stand alone guitar synthesizer. What it now represents, in these enlightened times, is an all analog, quite unique, signal processor/effects unit. Whereas a true guitar synth really requires its own dedicated pickup arrangement, this unit simply accepts a standard 1/4" jack input. Just patch your guitar, microphone, or other instrument into the X-911 and play one note at a time."

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Meet the Cyber G: Not a guitar, but a New Way to Play

Note: links to listings are affiliate links for which the site may be compensated.
video upload by Cyber G Guitar

Spotted this one via this listing, some pics capture below. See this review on Reddit for notes on the MIDI support.

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The Guitar of the Future | Casio DG-20, 1987

video upload by David Hilowitz Music

"Last week, I got to borrow a Casio DG-20 from ‪@maxdoes_‬ . Really cool instrument!

Download the FREE DecentSampler library: https://www.decentsamples.com/product..."

Inside a Casio DG-20.

The Synths Behind Don't You Want Me

video upload by Alex Ball

Check out Peahix's cover here, and a few others here.

"A complete recreation of The Human League's biggest hit, Don't you want me, using as many of the original instruments and techniques as possible.

0:00 Intro
0:30 Detective Work
1:49 Bass Line
4:16 A Problem
6:45 Drums
9:09 System 700 Perfect 5ths
9:57 System 700 16th Pattern
11:00 Secret instrument
13:21 System 700 verse diads
14:39 System 700 chords
15:13 The chord of whoops
16:13 System 700 ostinato
17:05 String Synth
18:47 Poly Synth
19:22 Summary
20:32 Full Remake"

#NAMM 2025: String Armonica from Merkaba Electronics

video upload by CatSynth TV

A demo of the String Armonica, an electro-mechanical synthesizer by Merkaba Electronics. It has 12 tuned strings, which are resonated by a custom internal synthesizer, and can be played via a MIDI controller.

To find out more, please visit https://soundstone.co/products/the-st...
_________
Please consider supporting this channel to help us bring you more synthesizer tutorials and other content.
Merch: https://shop.catsynth.com
Patreon: https://www.patreon.com/catsynth
Ko-Fi: https://ko-fi.com/catsynth"

"The String Armonica: A New Class of Synthesizer

The String Armonica has been upgraded with several key improvements and new features to expand its capabilities. This version includes adjustable string height with redesigned bridges and custom-polished steel pickup plates for improved tone and performance.

Each unit comes with a custom hard shell case.

New built-in modes:
• Staccato Mode: Adjust note duration for sharper, more defined sounds.
• Harp Sweeping Function: Use the pitch wheel to sweep seamlessly across strings.
• Arpeggiator: Choose from five patterns for dynamic, rhythmic sequences.
• Envelope Mode: Notes automatically fade in with adjustable timing for smooth, expressive playing.


We’re producing 50 units in this initial run, with the first 10 available for purchase next week."

NAMM 2025: Circle Guitar's New Rhythmic Possibilities

video upload by sonicstate

"At NAMM 2025, we caught up with Anthony, who presented the *Circle Guitar*. This innovative instrument features a wheel with plectrums that dynamically strum the strings, offering possibilities beyond human capability. Anthony mentioned the latest firmware update, which now leverages MPE MIDI for controlling wheel speed more dynamically.

The guitar's design incorporates a multi-channel pickup, allowing you to isolate each string's volume. Two modes are available: a Player mode for real-time expression with tap tempo, and a Producer mode using MPE MIDI to enable complex rhythms and programmable gate patterns for creating arpeggios.

Anthony expressed hopes to start with a limited batch release by mid-year, with the vision of making the instrument more accessible through potential licensing. Priced at £9,995 plus VAT, the Circle Guitar is aimed at redefining sonic exploration and expression for a diverse range of guitarists.

More Info:

https://circleinstruments.com/"

SQRL-01 - Custom synth guitar - Indoor demo

video upload by Love Hultén

"C&G Pocket Piano
Walrus Fundamental Reverb
Overengineered-drawbridge-nut-dispenser"