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"This is a unique opportunity to buy a monster synth, that is also a piece of synth pop history. Two cabinets plus the original keyboard, all lids, interconnection cables and original manual included. The first cabinet is a Roland System-700 Lab is one of the rarest and most sought-after modular synthesizers ever built. Introduced in 1976 as part of Roland’s legendary System-700 series, the Lab version was designed as a compact, self-contained modular laboratory for advanced sound design, research, and education — but with the same discrete analog circuitry, massive sound, and build quality as the full studio system.
This one was owned by Bill Vorn, keyboardist of the synth-pop band Rational Youth, used in the following albums dated 1981 to 1983 : Rational Youth, Saturdays in Silesia, City of Night and I want to see the light, as reported in the certification signed by Bill Vorn himself, provided in the item. The second one is another original SYS 700 one, connected and internally cabled to the main one by means of the original cable, with the super rare modules that you see in the picture: an additional, multimode filter, the great output module and… a professionally custom module with a perfect ARP 2600 VCF clone… plus other stuff.
All the best Sys 700 modules, featuring the iconic vintage Roland tone — warm and incredibly dynamic — and offers an extraordinary range of sonic possibilities thanks to its flexible patch architecture. Perfect for collectors, professional studios, or synth enthusiasts looking for a centerpiece instrument with historical and musical significance. The system sports a comprehensive modular architecture with 3 oscillators, 2 filters, 2 VCAs, 6 envelopes (!), mixer, phaser, spring reverb (HUGE) and …utilities.
Legendary System-700 sound — powerful basses, evolving textures, experimental tones. What to say more? Fully functional and in very good cosmetic condition with minor signs of use. You will never find another in such condition. Last call…"
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"Thoroughly serviced ready for this auction, a classic Mono/Poly in its original un-molested condition. It is US voltage, but comes with a little transformer for UK use. Serial number 376385. The fake wood endcheeks have typical minor damage, but everything else is very nice indeed. Packing at VEMIA: 15GBP."
"The Moog Opus 3 is a vintage polyphonic synth that combines string, organ and brass sounds in a four-octave keyboard, along with flexible controls for shaping each sound.
One of the coolest things about the Opus 3 is that it has a classic Moog four-pole filter that the brass and organ can be run through. The filter has the sound Moogs are famous four, and it can be run into self-oscillation.
The synth also features a three-phase chorus effect that uses the famed Reticon bucket brigade chips, as well as stereo and mono outputs.
Here are details about the unit for sale:
The old, deteriorating foam that sat below the control panel has been removed from this one, so you don’t have to worry about it.
All of the sliders, switches and rotary controls — except for the master volume — were changed out for New Old Stock replacements. All the slider caps and control knobs are New Old Stock as well. Everything works smoothly, with no noise or issues.
The master volume has very minor crackle at the top end of its range while it’s being moved. It is otherwise noise-free during normal operation. I would have had it changed out but it wasn’t possible to source an original replacement.
One of the three original Reticon chips in the chorus effect was replaced when an original failed. All three are working, and the chorus sounds great.
The original red LED in the Modulation section was swapped out for a new bright blue LED.
I wasn’t able to test the sustain jack on the unit’s front panel. Moog chose an unusual size jack here— it’s slightly smaller than a 1/4-inch input. It would be easy to swap it out with a proper 1/4-inch jack if you choose to do so.
The physical condition is very good. Note the scratches to the wood and some minor marks on the faceplate.
All of the notes sound as they should, and all controls and functions work as they should.
HELPFUL NOTES Although its functions are basic, you’ll need to understand the signal routing in the Opus 3. These are spelled out in the owner's manual (which is available online), but knowing the following will help you get your head around it.
For example, the chorus effect operates on the strings and organ, not on the brass. This is by design and is noted by an arrow on the control panel.
The Moog four-pole VCF can be used on the organ and brass, not the strings. Again, this is by design and is noted by an arrow on the control panel.
Frequency Modulation works on all sounds, but VCF modulation only works on the organ and brass because these are the two sounds that can be run through the VCF (see the point immediately above). Again, this is by design.
The length of chorus delay is set by using the delay fader in the Modulation section. This too is by design.
Two other noteworthy points:
• The pitch wheel has a firm detent (the point at which it sits at pitch). Other owners have noted the same thing about their units in online forums. It’s not difficult to work, but it’s firmer than on other synths I’ve owned.
• All of the electronics, aside from those mentioned above, are original and working fine. Electrical components can fail or become damaged with time and/or misuse. Always be sure you are connected to proper voltage, and note that ground loops can introduce hum."
"Trance Foundations Two by Techtronix transforms your Novation Circuit Tracks into a complete uplifting trance production machine — 128 synth patches, 64 drum samples, and 16 ready-to-play sessions at 140 BPM.
Designed to capture the emotional intensity and driving energy of both modern and classic euphoric trance, this pack delivers everything you need to craft festival-ready tracks directly on your groovebox — no DAW required.
The 128 synth patches cover every trance essential: 40 deep driving bass patches with that characteristic trance punch, 40 soaring lead patches built around epic supersaw stacks and emotionally charged melodic lines, 32 lush evolving pads for that signature wall of sound, plus 8 gated synths and 8 chord stabs for rhythmic movement and harmonic punch.
The 64 club-ready drum samples are purpose-built for trance production — punchy kicks, cymbals, crash and impact FX, and 24 bass stab samples organized in F minor across 3 rows, plus specialized trance vocal cuts and FX for authentic club energy. The 16 professionally sequenced demo sessions at 140 BPM round out the package, giving you instant inspiration and performance-ready templates from the moment you load the pack.
⚡ Triple Pack Savings: Add any 3 or more Techtronix products to your cart and save 20% automatically at checkout!
This firmware update is recommended for all users and adds new features:
1. New Span Mode: Binary Counter! See updated section in manual (or the video above this description!) for more information.
2. Conforms Spread CV range to the same voltage standard used by MultiWAVE
3. Improvements to N.U.S.S. timing logic
4. Minor enhancements and performance improvements
Been working on this for a while and it's finally at a point where I want to share it.
*Tresse* is a standalone polyphonic synthesizer built around Mutable Instruments' Plaits DSP code, running on an ESP32-S3 with a custom PCB. Three voices of polyphony, 38 synthesis engines, USB, DIN/TRS and Bluetooth MIDI, and perhaps Ableton Link and our upcoming stack (VMB) Våld Modular Bus, expected to ship this summer, and which will a new wireless comms protocol with negligible latency, auto discovery and machine mesh capabilities (to be released soon). Also enough knobs and encoders to actually play the thing without menu-diving, and a battery for when you're bored outside of your studio.
*The core idea:* take the full Plaits engine library — all 24 algorithms — and make it polyphonic in a self-contained hardware instrument. Then keep going and add 14 more custom engines on top. There are hundreds of options similar to this in modular systems and i thought why not bring all these god-level creative tools to bedroom, desktop producers who don't have the money or the space (or will) to mingle in the modular space, and bring them one contained box with all they need.
What's inside
*ESP32-S3* doing all the DSP across both cores (voices 0+1 on Core 1, voice 2 on Core 0, parallel render) **PCM5102A DAC**, 24-bit output, 32kHz sample rate *4 pots + 4 rotary encoders* through CD74HC4067 mux and MCP23017 I2C expander *OLED display* (128×64) for patch info, engine select, preset browsing *USB MIDI + BLE MIDI* — works with everything, no adapter needed for wireless Custom PCB, all through-hole friendly
38 engines
The first 24 are straight from Plaits — East Coast, Phase Distortion, all three DX7 variants, Terrain, String/Chords, Chiptune, Wavetable, Speech, Swarm, Particle, the Rings modes, the three drum engines, etc.
Then 14 custom engines built from scratch:
*Karplus-Strong* — proper physical string modeling with excitation morphing (noise → impulse → tonal) *ByteBeat* — 8 classic formulas with pitch-tracked rate, gets wild *CZ Phase Distortion* — Casio CZ-style, three distortion shapes *Supersaw* — up to 7 detuned saws with PWM, the obvious one but it needed to exist *Formant* — vowel synthesis with 3 bandpass resonators, gender shift control *2-Op FM* — clean FM with 13 ratios and operator feedback *Wavefolder* — sine/tri/saw/square source into a proper folder with bias *Noise Drums* — SVF-based with pitch envelope, covers kicks through metallic hits *Modal Resonator* — 8 tuned bandpass partials, morphs from harmonic → bell → bar inharmonicity, with a bowed excitation mode *Sympathetic Strings* — 3 coupled Karplus delay lines with controllable coupling and interval ratios *Comb Resonator* — 4 parallel comb filters with spread control *Drawbars* — organ-style additive with 8 Hammond-ratio partials *Complex Oscillator* — FM into wavefolder, Buchla-adjacent territory *Grain Noise* — granular noise with smoothing, good for textures and pads
Controls
Three parameter layers accessible via toggle buttons:
*Normal* — Timbre, Morph, Harmonics, Color on pots; Attack, Decay, FM, LFO Depth on encoders *MOD* — Fold, Detune, Ring Mod, Chorus on pots; LFO destination/shape/speed/sync on encoders *SHIFT* — Filter Cutoff/Reso/Env/Type on pots; Portamento, Octave, Vibrato depth/speed on encoders
Hold both buttons → engine select overlay. Double-tap MOD → system menu (randomizer, MIDI config, play mode). Double-tap SHIFT → preset browser across three banks (own patches, generated, branches).
Play modes: Poly, Mono, and chord modes (Major, Minor, 7th, Sus4, Power, Octave).
The randomizer is one of my favorite things — it generates random patches with procedural names (stuff like "Velvet Moth" or "Iron Shard"), you scroll through them with the encoder, and save the ones you like to a generated preset bank. 512 slots each for generated and branch presets, 128 for your own.
What it sounds like
Honestly covers a lot of ground. The Plaits engines already span everything from classic analog to FM to physical modeling to noise, and the custom engines fill in some gaps I wanted — proper supersaw, real Karplus-Strong, the modal/sympathetic stuff for metallic and evolving tones, and the ByteBeat engine for when you want to go full chaos. The global FX chain (filter, wavefolder, ring mod, chorus) ties everything together.
The project should be available from April 2026, in kit or assembled units! Price to be discolsed once i have the final FINAL prototype, but shouldn't hurt the wallet.
This is a *Våld Labs* project from Lisbon Portugal. Much more to come.
Would love to hear what people think, and happy to answer questions about the build or the DSP. Be aware that this is a pretty advenced prototype, but still a prototype"
"Quick control voltage+gate read / register write test before moving on. And a quick look at the module front panel...
Apart from ring/sync on voice A, which i have no room for on the module design, all parameters of the 3 voices of the chip are now broken out to the user interface.
Voice A juggles the tune and drum work. Voice B is hard synced to voice 1 for the gnarly 'pro1' sound. Noise is strobed over pwm on voice 1 for the 'snare' hits.
ALL SYSTEMS GO - As 80s Williams arcade games would have said 🔥🔥🔥
There are likely a few minor bugs in the code that i'll spot as the module comes to life. But all that remains to be coded is the hooking up of some shift registers to get control of the 28 leds.
Given that this is technically a single voice demo. I'm fairly confident this machine will be capable of sounding quite authentic to the Commodore 64 and the world that moved on when it's complete and has some nice compositions made for it 🙂
"Scale Snap generates random but scale-accurate note patterns of up to 16 steps. You choose the key/scale, root note, number of steps, and how “jumpy” the pattern feels. It also includes a chord/'Strainer' mode that locks notes to triad tones (random-only, ascending, or descending).
Connections include clock in, 1V/Oct CV out (0–5V), reset to step 1, and a random trigger/button. Controls let you set root, select from multiple scales (chromatic, major, minor modes, pentatonics, etc.), and adjust a parameter that switches between probability of change, octave range, and step count. The display shows step progress, current parameter values, root/scale name, and a scale grid with the active note highlighted."
"This unit is available for sale - if you're interested just shoot us an email at : Vintage dot Audio dot Institute @ gmail.com
Normally we focus on Italian gear but this is such a great little machine we thought we'd venture out a little.
This is the first model Bohm Solist - a mega-early, analog auto-accompaniment unit and drum machine from West Germany.
Comparing the two Bohm Solist models - the S and the 78 - we realized that they're almost identical.
The only thing that's added to the next model are a few chord sounds and 4 added bass line variations.
You can watch our demonstration of the Solist 78 here : • Dr. Böhm Solist 78
The Solist machines are essential song-writing tools and offer some great, useful features : great drum sounds, chords and bass lines as well as an arpeggiator, all transposed by the control keyboard.
This video is not really a demonstration but a jam of sorts, with some help from external effects this unit sounds great and is a hoot to play.
Specifications :
The one-octave keyboard controller can only operate one finger at a time - it's not made to be played, but to indicate the desired key to the main, sound generating unit.
The major, minor and 7th and 9th chord options are engaged by pressing the grey side keys and the buttons on the right in tandem with the desired key.
Dr. Böhm named the auto-accompaniment section Böhmat - perhaps a mix of Böhm and Automat - and it has quite a lot going on considering for such an antique device:
1. A bass sound generator of bass lines spanning two bars.
2. 3 chord sounds with 6 rhythmic patterns
3. An arpeggiator figure and a Wah effect for the chords and arpeggiator.
4. Analog drum machine of 24 patterns that are mixable, mute options for most individual drum sounds.
The bass and chords rhythm patterns are unique to each rhythm engaged while the arpeggiator line is a single pattern for all.
The tempo of the Wah-Wah LFO effect follows the main tempo.
The drum section has 24 drum rhythm patterns that can all be played at the same time if one desires.
There are mute options for all but a few drums sounds, as well as a snare roll and a single, hard-wired drum fill.
If you're into rare, mostly Italian synths and drum machines you can subscribe to our channel and please check out our other videos of rare gems, but you might also enjoy the V.A.I. website : a photo book and encyclopedia Italian Vintage Synths and Drum Machines: https://www.vintageaudioinstitute.com/"
CONTENT
00:00 What is Kaoss Pad KPV & sound demos
03:30 Build Quality & I/O
04:30 How to use the Kaoss Pad KPV
09:50 Sampling on the Kaoss Pad KPV
14:00 Minor Issues
15:28 Final thoughts
Demos with the Sequential Fourm & Elektron Digitakt II.
"The LX 61 is an Italian synthesiser from 1980 and it’s from the manufacturer SIEL. It features rhythm accompaniment with chords as well as a solo polyphonic keyboard with many different sounds I can be layered together as as well as as some minor envelope effects and vibrato. It also has the ability to input additional instruments to play through its internal amplifier while being vintage and analog. It also is relatively limited and you cannot play the solo parts on the entire 61 keys. Let’s have a look at what this can do and a brief exploration of all of its features."
"Aurelia is a wind instrument that bridges acoustic expression and electronic sound. It responds to both breath and touch, translating natural, human gestures into rich melodies. Aurelia’s key layout is unique to all other wind instruments, giving you the ability to play in every major and minor key with equal ease. Aurelia was created to feel as inviting to the novice as it is deeply expressive to the professional.
Aurelia’s keys use Cherry MX Silent Red keyswitches, giving you the accuracy and speed that can be found on the most well-tuned wind instruments. Housed in a handmade, solid walnut enclosure, Aurelia has a striking visual aesthetic that also feels extremely comfortable in the hands.
Aurelia has a unique sonic engine that uses warm, analog-modeled oscillators, creating a gradient of sound qualities that work well with both acoustic and electronic musical environments.
While playing solo melodies is at Aurelia’s core, it also has a Counterpoint Mode that will harmonize with you as you play. Just choose a key, and Aurelia will figure out the rest.
Aurelia is designed for portability. It can run on four rechargeable AA batteries, and has a built-in speaker. With USB MIDI out and a 1/4" stereo audio out, Aurelia excels in studio and live performance settings as well. Aurelia can be powered via USB-C with any device that supplies 4-17 volts.
~~~ Aurelia is made by Thomas Adam Billings, the sole creator of Terraphones. Every part of Aurelia is ethically sourced, assembled by hand, with solid walnut sourced and milled in the United States of America. By purchasing Aurelia, you are directly funding the ongoing research and development of a new wave of natural, electroacoustic musical instruments.
– $650 –
0 units available for pre-order. Expected lead time : 6-10 weeks
Shipping to North America, South America, the UK, the EU, and Australia."
"You're hearing all channels of MultiWAVE gated by QXG into Mimeophon. Tempi clocking. Rene 2 provides a handful of minor scale notes that the oscillators grab onto. PoliMATHS provides the envelopes. Its Accumulate input is patched, but at a rate only slightly slower than the main clock, so only a couple notes end up layered at a time. All modulation from Multimod, with the important destinations being the oscillator waveshapes, the envelope fall times, and channel selection at any given moment."
"The Roland MKS-100 from 1986. The Module version of the S-10 with a few minor differences, among them the Midi Mono mode. Sampling time and memory is the same on the S-10, MKS-100 and S-220 (the third and last sampling module in this early series)
Four memory slots (ABCD) with a total sampling time of 4,4 seconds at 30Khz. (8,8 sec @ 15Khz).
The S-10, MKS-100 and S-220 all used the Quick Disk (QD) system to load and save sounds.
Check out my Roland S-10, MKS-100,S-220 sample library here:
• Roland S-10 Sample Pack | Download now! [video below]
Big thanks to Anders Enger Jensen for lending me the MKS-100 for this video.
Some references say the MKS-100 is from 1987, but Roland made these in 1986 through to the end of the 80s."
Roland S-10 Sample Pack | Download now!
video upload by Espen Kraft
"A brand new sample pack for the Roland S-10, MKS-100 and S-220.
51 different samples taken from my vintage collection of synths and drum machines.
These are QD image files so you have to have a QD floppy emulator installed in your S-10 to use these.
Price is $15USD or €15Euros if you prefer that currency. Send me an email if you're interested. I only sell these through email. You'll find my email in the "about" here on my channel.
All the sounds heard in the demo video are coming from this pack. External reverb is on some of the samples in the video.
I think the Roland 12-bit S-samplers from the 80s has a special sound to them. If you have a S-10/MKS-100/S-220 and you just want some new cool sounds for it then this pack might be for you. These sounds can not be found anywhere else. They're all made by me one way or the other."
"This is a unique opportunity to buy a monster synth, that is also a piece of synth pop history. Two cabinets plus the original keyboard, all lids, interconnection cables and original manual included. The first cabinet is a Roland System-700 Lab is one of the rarest and most sought-after modular synthesizers ever built.
