New Cherry Audio DCO-106 - Juno-106 Software Emulation

Exploring DCO-106 with Phil Bennett (Starship)

Cherry Audio

"The new DCO-106 has arrived!

Recreating the sound of a classic synthesizer is no easy task. DCO-106 lovingly recreates the unique sonic footprint of one the most iconic 80’s polysynths in exhaustive detail, while adding modern features for massively expanded creativity.

The DCO-106 is both easy to understand and powerful to explore, creating a massive array of sonic landscapes, cutting lead sounds, warm and hazy pads, punchy synthetic electro drums, and far more.

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Making Synthwave with Cherry Audio DCO-106

Cherry Audio

"In this video, we'll be harnessing the full power of DCO-106 to create an entire track using only this one instrument!

Recreating the sound of a classic synthesizer is no easy task. DCO-106 lovingly recreates the unique sonic footprint of one the most iconic 80’s polysynths in exhaustive detail, while adding modern features for massively expanded creativity.

The DCO-106 is both easy to understand and powerful to explore, creating a massive array of sonic landscapes, cutting lead sounds, warm and hazy pads, punchy synthetic electro drums, and far more."

Exploring DCO-106 with J3PO

Cherry Audio

"The producer extraordinaire J3PO recently sat down with the DCO-106, and shared the results!

DCO-106 offers a precise recreation of the iconic polysynth, with over 300 presets, 16 voice polyphony, three reverb modes, MPE support, and much more.

The DCO-106 is both easy to understand and powerful to explore, creating a massive array of sonic landscapes, cutting lead sounds, warm and hazy pads, punchy synthetic electro drums, and far more."

CHERRY AUDIO DCO-106 - Playing ROLAND JUNO-106 Factory Presets

video upload by Woody Piano Shack

"All playing demo of the CHERRY AUDIO DCO-106, an emulation of the ROLAND JONO-106 as a software synth VST plugin. Just playing random synthesizer pop tunes and enjoying the vintage sounds, pads, bass, brass, strings and more."

MORE WOODY PIANO SHACK
► WEBSITE https://woodypianoshack.com - additional links there.
► PIANO INSPIRATION SERIES http://bit.ly/inspiration_welcome
► SUPPORT http://bit.ly/wps_support
► MUSIC https://woodypianoshack.bandcamp.com

KIWI-106 Upgrade for the Roland Juno-106 Now Available

via Kiwitechnics

"It's been a long two years to keep things quiet, but it's time for Kiwitechnics and Psicraft Designs to let everyone in on the big big secret: Kiwi-106 is now shipping! Guided by such gear luminaries as Dave Lovelace (the creator/author of Keyboard magazine's Packrat comic) and the YouTube channel Juno-106 expert Syntegrator, Kiwitechnics and Psicraft have brought this beloved synth classic out of the 80s and put it where it belongs: The heart of your 21st century studio. An expanded synthesis architecture with dual envelopes and multi-waveform LFOs is only the tip of the creative possibilities that any Juno-106 can now possess. Comprehensive routing of controls, high resolution parameters, and eight groups of 64 patches expand the Juno-106's synthesis capability many times over, but this we're not done yet. Add in a six voice polyphonic 124 step sequencer and a pattern generator to the mix and Juno-106 becomes a new class of instrument. Now design and implement a totally modern MIDI implementation suited for modern stage and studios and provide a free Vyzex professional instrument Mac/Windows editor/librarian along with the price of admission and what do you have? Modern Brains and Vintage Brawn, baby. The Kiwi-106!"

"The Kiwi106 Upgrade features:-
•512 Patches can be stored and edited. 128 Factory Patches are preloaded
•Patches are stored in Flash memory so no battery is required.
•Bend Controls (DCO, VCF Bend, LFO Mod Level & Portamento) are stored with the Patch
•MidiCC & Sysex support for all parameters and Midi Sysex support for Patch Dump & Load
•NRPN & Sysex variable parameter control supports 12 bit for 4096 parameter steps
•Patch Editor Control of Parameters (PE firmware v5.2 or higher). Free PC/MAC editor is available from Kiwi-106.com
•Key Assign Modes are Poly I&II, Unison Legato & Staccato, Mono Legato & Staccato
•Pedal & Front Panel Button Note Hold modes
•Portamento in Unison, Arp & Chord modes
•DCO Key Assign Detune available in all key modes except mono
•Internal Clock that can be used to clock the Arp, Sequence and/or Pattern and can optionally generate a midi clock
•Two independent envelope generators. Each ENV Mod can select from ENV 1 or 2 and be Inverted or Normal
•Two independent Low Frequency Oscillators with 6 waveforms each. LFO2 random2 wave can be clocked from the Internal clock. Each LFO Mod can select from LFO 1 or 2. LFOs can be plus and minus base note or plus base note only. Each LFO Mod can be inverted.
•Aftertouch, Modulation Level and Dynamics via midi. Dynamics can optionally control the VCA and/or VCF. The Dynamics have been modeled on the Juno-2 with both the VCF & VCA mod turned on by default for a more natural and expressive play. This brings new life to every patch in the Kiwi-106.
•Arp/Seq/Pattern Clocks can optionally display on the KeyT LED and LFO 1 and LFO 2 clocks can optionally display on the Group lights
•Key transpose allows transposition to any key with a range of plus 2 or minus 1 octaves. Sequencer key can be shifted while playing
•Compatible midiCC control set for all Kiwitechnics products
•Comes with metal LabelCHORD MODE
•Any chord with up to 6 notes can be set and played from any keyARPEGGIATOR
•The Arpeggiator can be independently clocked from the Internal or External Clocks, LFO2, Pattern Output or midi clock divided by 3,4,6,9,12,18,24,36,48,72,96,128,144,168 or 192.
•Arp modes are Up, Down, Up and Down, Random, 0 to 3 octaves
•Arp can be Started, Stopped & Continued using Midi Commands
•Arp state is saved with a Patch. This allows the Arp to play automatically when a Patch is loaded
•Appeggiator will Output Midi DataSEQUENCER
•8 separate 124 Max step Polyphonic sequences can be created and stored
•Sequences can be edited
•Sequencer can be Started, Stopped & Continued using Midi Commands
•The Sequencer can be independently clocked from the Internal or External clocks, LFO2, Pattern output or midi clock divided by 3,4,6,9,12,18,24,36,48,72,96,128,144,168 or 192.
•Sequence state is saved with a Patch. This allows the Sequencer to load and play automatically when a Patch is loaded
•Sequencer will Output Midi Data and can have an independent midi channelPATTERN GENERATOR
•8 Pattern Generator patterns can be saved and edited. The pattern can be any length between 2 and 16 steps
•The Pattern Generator can be independently clocked from the Internal or External clocks, LFO2 or midi clock divided by 3,4,6,9,12,18,24,36,48,72,96,128,144,168 or 192.
•Pattern Generator can be Started, Stopped & Continued using Midi Commands
•Pattern Effect can be faded from no effect to full effect.
•Pattern state is saved with a Patch. This allows the Pattern Generator to load and play automatically when a Patch is loadedEDITOR
•A comprehensive editor (PC & Mac) is supplied with the upgrade and can be downloaded here. This has been developed by Psicraft under the Vyzex brand

Roland Juno-106 Synthesizer - The little brother in the shadow of the Juno-60?

video upload by RetroSound

"(c)2007-22 by RetroSound
supported by UVI: http://bit.ly/retrosound-uvi

❤️ Support #RetroSound​ channel: retrosound.creator-spring.com

Many consider the Juno-60 to be the best Juno synthesizer. This is reflected in the great admiration and in the second-hand market prices. And yes, I like the Juno-60 a lot too. It was one of my first synths and I made most of the tracks with it. But, I also like the Juno-106 very much. The sound character is slightly different. Some people say it sounds plastic. I think they mean that the sound is less lush and more sterile. Well, the Juno-106 sounds like the link to the later JX series to me. But the sound is more deep. But he only has one DCO and one sub oscillator per voice. With the Juno-106 you can achieve wonderful sub-basses that the Juno-60 cannot do exactly as well. The Juno-106 pad sounds are also wonderful. I think there should be more love for the Juno-106. It's not a Juno-60. But the Juno-60 is not a Juno-106 either.

And here is a 90s dance music demo track
all synthesizer sounds: Roland Juno-106 (1984)
drums: E-MU Emax
recording: multi-track

The Juno-106 playlist:"

1980s Roland Juno-106 Vintage Analog Synthesizer Fully Serviced w/ MIDI

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

via this auction

"1980's Roland Juno-106 analog synthesizer in exceptional condition and in good working order. Recently imported directly from Japan, this synth has just been fully serviced and calibrated, fitted with an IEC power receptacle and wired for 120V. One of the most enduringly popular Roland synths of the '80s, the Juno-106 has virtually the same synth engine as its predecessor the Juno 60, yet with extensive MIDI capability and over twice the patch memory storage (128 patches).

The Juno-106 is a six-voice polyphonic and programable analog synth with one digitally controlled oscillator (DCO) per voice. The Juno-106 uses built-in Chorus to fatten up its sound to dramatic effect too. The nature of the Juno's DCO results in a sound that is stable, always in perfect tune, but still warm and analog. The Juno features an excellent 24dB/oct analog lowpass filter with plenty of resonance and self-oscillating possibilities as well as a non-resonant high pass filter. The programable pitch/mod bender can be assigned to control the DCO pitch, VCF cutoff, and LFO amount all at once or individually.

Cosmetically, this Roland synthesizer shows only light wear on the back and bottom of the enclosure, with clean and virtually unfaded key caps, all original slider caps intact, and bright graphics. This synth is straightforward, powerful, and the perfect balance of thick analog warmth and modern digital convenience."

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New SoundForce DCO Eurorack Module

SoundForce DCO - short demo video Published on May 6, 2019 SoundForce

"SoundForce introduces a digitally controlled oscillator module for Eurorack

The SoundForce DCO is an oscillator for Eurorack based on the architecture of the Juno-60/106 oscillator section. It is a modern homage to that sound using technology from the future. It provides true analog waveforms with digital stability.

Some tech-talk:
A DCO is not an all-analog VCO but also not a digital oscillator. It’s an hybrid design that combines the best of both. Similarly to some VCO’s, the DCO generates its core waveform, the saw wave, by charging a capacitor in an op-amp integrator configuration. A VCO will restart the waveform cycle when the signal has reached its maximum amplitude. But the DCO starts an new cycle when a micro-controller, a small computer chip, commands it to. The micro-controller also controls the rate at which the capacitor is charging, hence the frequency of the oscillator. As with a digital oscillator, the DCO acquires the CV input voltages and turns them into numbers that will later set the frequency of the oscillator. This is done inside the micro-controller using 16 bits sigma-delta analog to digital converters. All signals are true analog signals: the PULSE wave is derived from the SAW wave using a comparator and the SUB oscillators are generated using a flip-flop IC. Furthermore, the use of a very modern micro-controller with built-in 32 bits timers have improved the frequency accuracy a lot compared to the original design.

If you want to dive deeper in the technicalities of DCOs, check out this video from GOLT! [posted here]

Features:
The SoundForce DCO features 10 slide pots (faders) reminiscent of the vintage Roland synths. 5 sound sources are available: SAW, PULSE, SUB1 (1 octave lower), SUB2 (2 octaves lower) and NOISE. The built-in mixer allows you to mix them together using the faders and the MIX output jack. The PULSE has manual pulse width control, as well as PWM with a CV input and an attenuator. An FM input is also available with an attenuator. The oscillator can be hard synced to another oscillator using the SYNC input.

Specifications:
– 16HP
– Frequency range : 20Hz – 14kHz
– Depth: 24mm (+ power connector)
– Power: +12V 82mA, -12V 26mA
– V/OCT input range -3 to 7V
– FM input range -5V to 5V
– PWM input range -5V to 5V

Price and availability:
The module will be shown on the SoundForce booth this week at Superbooth (booth O501) along with some more upcoming modules. It’s available right now to pre-order at 229 euros incl. VAT (189 euros outside of Europe) on the SoundForce webshop. It will be shipping in June."

---

Interesting side note: this is post 180,000 on the site.

Juno-60 and Juno-106

Published on Nov 25, 2013 SynthMania·294 videos

"Five demo clips of the Roland Juno-60 and Roland Juno-106, two classic DCO-based analog synths of the '80s. LinnDrum - drums; Eventide H3000-D/SE = dual long delay
Clip 1: Juno-60: Bass; Juno-106: Brass --- 00:10
Clip 2: Juno-60: Harp; Juno-106: Strings --- 01:57
Clip 3: Juno-60: Syn Strings; Juno-106: Synth --- 04:21
Clip 4: Juno-60: Strings; Juno-106: Bass --- 07:09
Clip 5: Juno-60: Organ; Juno-106: Bass --- 09:54"

ROLAND JUNO 106 Analog Synth (Pro Serviced) w/ Kiwi Upgrade & Walnut end Cheeks

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

via this auction

"It has recently been completely serviced by the Synthspa, so you can be sure that the voice chips are all completely restored and won't fail. I've also upgraded it to have beautiful wood cheeks, but I will include the original end cheeks in the package as well.

This one comes with the KIWI-106 hardware/software upgrade installed, which means it sports an expansive range of functionality that takes the 106 to the next level (see below). That said, I will include the original board for the 106 with this, in case you want to swap out of the Kiwi upgrade (no idea why you'd want to do that, though!).

The Kiwi106 Upgrade features:

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Roland Juno 106 Analog Polyphonic Synthesizer with Dual VCF/VCO ICs Modification and Flight Case

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

via this auction

"This Roland has been modified here is information about the stock setup and then info about modifications.

The Stock Juno-106 is a six-voice polyphonic and programmable analog synth with one digitally controlled oscillator (DCO) per voice. While classic monophonic syths used two or three oscillators to create a fatter sound(check mods below), the Juno-106 uses built-Chorus to fatten up its sound with dramatic effect. The nature of its DCO meant it was stable and always in perfect tune but still warm and analog. There is an excellent 24db/oct analog low pass filter with plenty of resonance and self oscillating possibilities and a non-resonant high pass filter. The programmable pitch/mod bender can be assigned to control the DCO pitch, VCF cut off, and LFO amount all at once or individually. There are 16 MIDI channels available and MIDI SYsEX data can be transmitted/recieved from all the sliders and buttons for total remote control and sequencing capability. A switch on the back of the keyboard next to the MIDI port allows the user to switch between three types of MIDI modes: KEYBOARD, HOLD, BENDER, PATCH or ALL DATA(including SysEX).

Fully restored with Mods: This unit has been Completely rebuilt, new DCO chips, and battery. and modified with a DUAL VCF/VCA ICS which give it a thicker full sound(the extra filtier/vco chips are located under the PCB) The keyboard has been completely re-graphic in purple and yellow with matching LEDS and dark walnut sides. It comes with a printed copy of the owners and service manual. A matching spec(other than color) keyboard also modded by Roger Gastrow now resides at Henson Studios in California."

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Roland Interview with the Developers of the Boutique Line of Synthesizers

The interview is currently on Roland's site here. The text is captured below for the archives.

"WHAT WAS THE STARTING POINT IN THE DEVELOPMENT OF THE ROLAND BOUTIQUE SERIES?

Tojo:Our starting point was that we wanted to create a full-fledged synth in a compact form factor; something that might look like a gadget at first glance, but was capable of producing amazing sounds. We wanted to create a synth that people could casually enjoy, came with a built-in speaker, and could also run on batteries. Since we had the ACB (Analog Circuit Behavior) modeling technology that was developed for AIRA and a mini keyboard that was first incorporated in the JD-Xi, we thought that we could make something interesting by combining these two. That was around the end of last year, and actual development began in around January this year.

WERE YOU PLAYING WITH THE IDEA OF BASING THIS SERIES ON SYNTH CLASSICS RIGHT FROM THE OUTSET?

Tojo:Yes, we were. We wanted to combine ACB and the mini keyboard to reproduce classics that everyone was familiar with. The JUPITER-8 and JUNO-106 were candidates right from the start, since these synths are still very popular today. We wanted to add another synth to the lineup, so we decided to go with the JX-3P, which produces different types of sounds from either the JUPITER or JUNO. We reached the decision to go with these three synths rather quickly, without much debate.

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Roland Juno-106 Vintage Polyphonic Synthesizer SN 508423

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

via this auction

"The Roland Juno-106 is a 61 Key, six voice fully programmable polyphonic synthesizer.

• The digitally controlled oscillator (DCO) guarantees an extremely stable pitch.
• The Juno-106 is the complete 6 voice synthesizer provided with 6 VCF's, 6 VCA's, and 6 ENV's.
• The Juno-106 includes memory capacity to retain up to 128 different patch programs.
• The Juno-106 features battery back up system to retain the programs even when switched off.
• If connecting the Pedal Switch to the PATCH SHIFT jack, you can call the 8 patch programs stored in the same bank one after another, simply by pressing the pedal.
• Transposition to any key is possible by the Transpose function.
• The Portament function is provided.
• The Chorus effect produces rich and expansive sounds.
• Featured with MIDI BUS, the Juno-106 can be set up with other MIDI devices."

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New Kiwitechnics Kiwi-1000 Upgrade for the Oberheim Matrix-1000

Kiwitechnics, makers of the Kiwi upgrades for the Roland JX-3P, JX-8P, Juno-106, and KORG Polyix, have a new DIY upgrade available for the Oberheim Matrix-1000. The cost is $295 plus shipping.

Details via Kiwitechnics:

This is an upgrade for the Oberheim M1000 rack mount synth module. This will transform the M1000 from a difficult to edit preset module with a poor midi interface into a full featured synth with some excellent features. The M1000 synth hardware is based on the CEM3396 ‘synth on a chip’ and this gives the synth a versatile set of features including multiple combined and editable waveforms on each DCO as well as PWM and VCF FM controls but will still retain the Oberheim ‘sound’. The upgrade will also replace the on board DCO master clock. The M1000 clock is a single fixed master clock that both DCOs use and this limits the range possible to about 6 octaves. The K1000 upgrade will replace the single master clock with separate clocks sources and each of these will have a range of 64’-2’. This is pushing the CEM chip to it’s limits but we feel the results are worth the effort.

The Oberheim M1000 has been hamstrung with most of the patches that cannot be edited, poor midi and a difficult patch format making editing and sound creating a challenge. We are using the experience gained with our other upgrades to redesign the M1000 to be a fully fledged synth with all the usual Kiwi features. This is not a M1000 with the midi fixed it is a completely new synth. We are incorporating Oberheim tone imports but because the tone layouts are so different the conversion is not going to produce exact matches. We are also putting in imports for the K106 & K8P products and well as Roland JX8P and JX-10/MKS-70 (Tones only) which will provide a big tone library from the web to use as a starting point.

The upgrade comes with a front panel label that will fit over the existing buttons and LEDs.

The Kiwi-1000 Upgrade features:

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machinedrum idm with juno 106

YouTube via 909techno
"messing around with machine drum triggering juno 106. DCO's on the juno? still sound beautiful to me!"

machinedrum loves juno 106

"machine drum triggering juno 106. some ctrl-all action, juno into the md. some random knobs twists - i still don't know much about the md's input machines.

i think this is why i'll never sell the 106. maybe my vco monosynths have a bit more refined sound but that juno saw is still nice.

same for the md. i'm using the user wave version btw. maybe a few samples. i don't know. just got the md out after a long break. mki. chaining two patterns at times."

machinedrum loves juno 106 part 2


elektron machinedrum random stream

"random stream from my machinedrum. just flicking through patterns. many with bad feedback so watch your ears.

really not worth watching unless you've watched every other machinedrum video and still want more.

userwave vesion in use."

Roland Juno-106 Late Night Sessions 2017 Analog Synthesizer Rik Marston JU-6 DCO

Published on May 12, 2017 SynthgodXXX

"Roland Juno-106 Late Night Sessions 2017
Synthesizer Demo By Rik Marston
**Watch in HD!** **100% No talking!!!**
**Warning: Light Clipping @ 06:55 **

The Roland JUNO-106 with a Gl!tch MOD that
makes the SUB a SAW. Check it out the SUB SAW
in action @ 10:33 when I strip it down to a mere
SAW then I turn up the SUB SAW. This is EPIC for
Industrial or Experimental applications! It creates
such a modern twist to the JUNO-106 sound!
Very interesting!!!!
You can hear the original SUB sound in action on
my other JUNO-106 & HS-60 videos on my YouTube
page. Anyway, I was just giving it a warm up for
my new DARK JUNO sample collections coming
out Fall/Winter 2017!! Over 2GB's of JUNO-106!
You guessed it, darker analog sounds for Movie
scoring, Ambient, Experimental & Industrial music!

Thank you for watching!
Please SUBSCRIBE!
More Synthesizer Demos &
Ambient Chill Zen Music
COMING SOON!!
Rik
4/13/2017"

Roland Juno-106

via this auction

"From the front cover of the owner's manual:

"The Roland Juno-106 is 61 Key, six voice fully programmably polyphonic synthesizer.

The digitally controlled oscillator (DCO) guarantees an extremely stable pitch.

The Juno-106 is the complate 6 voice synthesizer provided with 6 VCF's, 6 VCA's, and 6 ENV's.

The Juno-106 includes memory capcity to retain up to 128 different patch programs

The Juno-106 features battery back up system to retain the programs even when switched off.

If connecting the Pedal Switch to the PATCH SHIFT jack, you can call the 8 patch programs stored in the same bank one after another, simply by pressing the pedal.

Transposition to any key is possible by the Transpose function.

The Portament funtion is provided.

The Chorus effect produces rich and expansive sounds.

Featured with MIDI BUS, the Juno-106 can be set up with other MIDI devices."

Vintage Roland Juno 106

Note: Auction links are affiliate links for which the site may be compensated.
Published on Jan 15, 2020 Perfect Circuit

"If you want a synthesizer that evokes the sound of the 1980s, the Roland Juno-106 is it. Providing unprecedented patch storage and MIDI connectivity, the 106 was state of the art when it was released in 1984—and it still has a sound not quite like anything else.

The Juno-106 uses a DCO for its core sound generation, providing super-stable and reliable tuning. This combined with its distinctive Roland filter and unmistakable swirling chorus tones earned the 106 a strong place in the history of electronic instruments. Providing stellar pads, warm stabs, and rich, cascading atmospheres, the Juno-106 is perhaps one of the most compelling keyboard synths ever made."

via this auction

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Kawai SX-210

via this auction

"General Description :
The Kawai SX-210 (also manufactured under the brand name of Teisco) is probably one of the most underrated analog synths ever. Being a true analog machine and holding a set of features which many other single oscillator synths are missing, it is still a mystery why such a great instrument like the SX-210 has never been through the popularity of other equivalent synths like the Juno 60/106 and Polysix for example. Still it is quite rare as not many have been made.

The Kawai/Teisco SX-210 is basically an 8 voice single DCO synth based on the SSM2044 filter chips. It is generally very stable (as you might expect from it, being a DCO synth). The overall sound is very warm, yet not as fat as either the Junos or the poly Korgs.

On the other hand, it does feature an envelope for its filters, which you won't find on "basic" synths like the Juno 60/106. And it sounds like nothing else actually. I was able to nail that VCS3 "Welcome to the Machine" leads quite easily !

The SX-210 is also one of the first to feature an alpha dial, but not like most alpha dial based synths, you won't find any cumbersome menus to hate to deal with ;)

Instead, there is a switch for every function, and a small indicator to present the value for the switch selected. This is a great approach to implement, as you are still able to check into every parameter of a particular preset and read its current value !

The SX-210 is also 8 voice polyphonic, and can be used at 8 single voice, 4 dual voice and 1 eight voice configurations, which means you can stack all 8 oscillators into a one fat lead sound or a mega power chord lead ! Can you do that with your Juno ?! ;)

The LFO can oscillate the DCO section, VCF and VCA, all at the same time ! (use a Polysix and you'll have to decide which of the section you'd like to modulateן¿½ no simultaneous LFO action !) It is quite versatile and features a Reverse mode and 3 different waveforms plus a Trigger, as well as an LFO Delay and a Bender. Quite impressive for a single DCO synth, huh ?!

The single DCO section can do PW, PWM, SAW and Sub, and noise as well (non for the Polysixן¿½) The SX-210 also has a built in stereo Ensemble effect which is very rich sounding and will "widen up" just about any pad or a string preset very nicely, but I must admit it is not as warm as our well known Polysix Ensemble effect, and generally, far from being versatile as the Chorus/Phaser/Ensample Polysix section. The instrument could do wonders has it had the Polysix effect board ;)

Using the VCF modulation section (KCV / LFO / EG) it is possible to create some really interesting sounds. My SX-210 had two bad 4066 chips at the same place on two different voices, making the EG section going bad, only a few months separating between each incident. So this is where you should first look at when you're starting to experience strange EG behavior !"

Note: see this post for a rare one with extra buttons under the keys.

Analyzing the Juno-106 DCO circuit

"In the previous posting, we discussed how the core of a typical VCO works, and the main sources of drift and instability in a VCO core circuit. The Digitally Controlled Oscillator (DCO) is a 1980s technology designed to eliminate most or all of these sources of inaccuracy, while still operating as basically an analog VCO. The DCO was a transitional technology that arose as soon as inexpensive microprocessors were available that were fast enough to control the timing of an audio oscillator circuit, but not yet fast enough to compute the oscillating waveform entirely in the digital domain. (A secondary consideration was the fact that fast 16-bit digital-to-analog converters, although available, were still quite expensive at the time.) The distinguishing characteristic of a DCO, as opposed to a purely digital oscillator, is that the DCO does not have a D/A converter in the audio signal path. (It may have a D/A converter in the control path.)"

click here for the full post.