Tuesday, October 17, 2023
Roland Gaia 2 w/ Original Box
Siel Orchestra 2 Vintage Analog Italian String Synth
Note: Auction links are affiliate links for which the site may be compensated.
via this auction
"The Siel Orchestra 2 was released in Italy in 1983. It has 4 preset sounds with many sliders and edit parameters. The Brass section has a great filter with cutoff and resonance sliders. 5-band graphic EQ, LFO, Octave Transposition and "Animator" section with beautiful analog flanger."
via this auction
"The Siel Orchestra 2 was released in Italy in 1983. It has 4 preset sounds with many sliders and edit parameters. The Brass section has a great filter with cutoff and resonance sliders. 5-band graphic EQ, LFO, Octave Transposition and "Animator" section with beautiful analog flanger."
Moog Polymoog Keyboard 280a Vintage Synthesiser
Oberheim DSX SN A34523
Note: Auction links are affiliate links for which the site may be compensated.
via this auction
Pics of the inside below.
"Transport yourself back to the early 1980s, a time when innovation was paramount, and Oberheim was at the forefront. The visionary Oberheim Parallel Buss system emerged as a proprietary masterpiece that paved the way for seamless connectivity and synchronization in the pre-MIDI era. This groundbreaking system interlinked an array of Oberheim marvels, including the resplendent OB-8 eight-voice synthesizer, the rhythmic wizardry of the DMX drum machine, and the ingenious DSX Digital Polyphonic Sequencer.
The DSX, a true marvel of its time, also wove its magic with other Oberheim synthesizers, embracing the likes of the OB-Xa, OB-SX, and OB-X. It could either sway to the DMX's rhythmic beat or take the reins of control over the OB-synths themselves. But the DSX was not content with merely directing these musical maestros; it held the power to command an additional eight analog synthesizers through its 8 CV and Gate outputs, a feat unparalleled at the time.
For analog synth enthusiasts, the DSX was a revelation. It could faithfully capture your live performances, recording notes and patch changes in real-time, with an astonishing capacity to hold up to 6,000 notes. With room for ten distinct sequences or songs, each of these sequences could unleash ten polyphonic tracks, orchestrating a symphony of OB-synths and DMXs. The DSX even remembered the intricate details, such as splits and doubles. To refine your compositions, it offered quantizing, looping, editing, transposing, and the ability to merge sequences.
If you possess any of these cherished pre-MIDI Oberheim analog OB-synths, the DSX presents a timeless solution for direct, classic control without the need for MIDI retrofits or complex interfaces. Despite some cosmetic wear, this pre-owned gem is in impeccable working condition, meticulously serviced with a new internal battery, internal cleaning, and maintenance. To complete the experience, the DSX arrives with a sync cable for effortless integration with your Oberheim companions and a comprehensive manual. It's your chance to rediscover the magic of a bygone era, rekindling the analog spark that fueled musical revolutions."
via this auction
Pics of the inside below.

The DSX, a true marvel of its time, also wove its magic with other Oberheim synthesizers, embracing the likes of the OB-Xa, OB-SX, and OB-X. It could either sway to the DMX's rhythmic beat or take the reins of control over the OB-synths themselves. But the DSX was not content with merely directing these musical maestros; it held the power to command an additional eight analog synthesizers through its 8 CV and Gate outputs, a feat unparalleled at the time.
For analog synth enthusiasts, the DSX was a revelation. It could faithfully capture your live performances, recording notes and patch changes in real-time, with an astonishing capacity to hold up to 6,000 notes. With room for ten distinct sequences or songs, each of these sequences could unleash ten polyphonic tracks, orchestrating a symphony of OB-synths and DMXs. The DSX even remembered the intricate details, such as splits and doubles. To refine your compositions, it offered quantizing, looping, editing, transposing, and the ability to merge sequences.
If you possess any of these cherished pre-MIDI Oberheim analog OB-synths, the DSX presents a timeless solution for direct, classic control without the need for MIDI retrofits or complex interfaces. Despite some cosmetic wear, this pre-owned gem is in impeccable working condition, meticulously serviced with a new internal battery, internal cleaning, and maintenance. To complete the experience, the DSX arrives with a sync cable for effortless integration with your Oberheim companions and a comprehensive manual. It's your chance to rediscover the magic of a bygone era, rekindling the analog spark that fueled musical revolutions."
Oberheim OB-SX w/ Magic Box MIDI & BCR2000 Controller
Note: Auction links are affiliate links for which the site may be compensated.
via this auction
Pics of the inside below.

"This is an Oberheim OB-SX 6 voice analog synthesizer. It has been upgraded with a New "Magic Box" MIDIcontrol device from MIDI Soft in Germany. The Magic Box includes 56 additional patches to the 56 already in the OB-SX. This includes a Behringer BRC2000 that has been programmed with the MIDIcontrol software included with the Magic Box. I had new custom Oak Wood end cheeks made that were wood stained to come closer to the OB-SX wood end cheeks. The BCR2000 also has a custom Over-Lay to represent all the parameters for the Magic Box. The connections to the OB-SX are simple, just attach the box to the interface connector in the rear center of the OB-SX and plug the box in. The MIDI connections are as follows, MIDI "In" from the box to MIDI "Out A" to the BCR2000 and MIDI "Out" from the box to MIDI "Thru/Out B" on the BCR2000. The BCR2000 is set up for Stand-Alone 3 or S-3 on the unit. You can change anything you want but this is how it is set up presently to use. Once the BCR2000 is hooked up, press the "Auto" button on the OB-SX to Tune all the Voices. Turn on the BCR2000 and plug in the Magic Box (there is no power switch on the box). I will include both USB power cable and AC power adapter with the Magic Box. I will also include the power cable for the BCR2000 and OB-SX. Once everything is on and tuned, select a Patch from the lower Left controller on the BCR2000 and press "Load", lower Right. This needs to be done each time a patch is selected on the BCR2000. You can also select banks and patches on the OB-SX by just pressing them, this will allow you to use the presets and Edit the patches in the OB-SX from the BCR2000. I will send the instructions I printed out, but you can also go to the MIDI Soft website. This is basically a trimmed down version of an OBXa with full control like the OBXa. The voice cards are almost identical, same CEM3340 VCO's, CEM3310 VCAs, but only one CEM3320 VCF 12dB 2 pole filter. The only difference is that the OBXa has 2 CEM3320 chips, one with the 12dB 2 pole Oberheim configuration and one with the 14dB 4 pole Moog style configuration. Other than that, they are basically the same voice cards and now you have the same controls as the OBXa with the programmed BCR2000 and Magic Box. Also, the OBXa has 120 presets. With the Magic Box, you now have a total of 112 presets on the OB-SX and an extra 56 User presets to make your own patches.
The unit itself has been well kept. All the keys, knobs, switches and buttons work. The unit tunes fine when the "Auto" button is pressed. All oscillators work as they should. All of the keys are very quiet and have nice action. The inside is immaculate. The outside case has some scratches and chips on the hood, the underside has longer scratches. Please review all the pictures before purchasing or making an offer. The unit is very deep, about 20", I had to customize my keyboard rack.
· This is a super rare, from the factory 56 patch (switchless), 6 voice late production version – voice cards are the 4 pin variety and are dated: “Nov 04 1981”
· Coming from the factory with 6 voice cards.
· Has had a full power supply rebuild within the last 3 years, modern capacitors & rectifiers with better specs than the OEM 1981 designs.
· Several other internal items were replaced along with the power supply, including: dip switch selector for the voice boards and *ALL* of the potentiometers on *ALL* the voice cards have been upgraded to the multi turn, “box” style as opposed to the original single turn “dial” type potentiometers. Huge difference in calibrating and holding precise values.
Most of the Oberheim classic sounds are factory presets in this fabulous instrument. It will ship with a power cord. The unit should warm up for about 15-30 minutes before use even though it tunes fine at first power up. The units will be double boxed for protection in shipping. The main unit is also very heavy."
via this auction
Pics of the inside below.



The unit itself has been well kept. All the keys, knobs, switches and buttons work. The unit tunes fine when the "Auto" button is pressed. All oscillators work as they should. All of the keys are very quiet and have nice action. The inside is immaculate. The outside case has some scratches and chips on the hood, the underside has longer scratches. Please review all the pictures before purchasing or making an offer. The unit is very deep, about 20", I had to customize my keyboard rack.
· This is a super rare, from the factory 56 patch (switchless), 6 voice late production version – voice cards are the 4 pin variety and are dated: “Nov 04 1981”
· Coming from the factory with 6 voice cards.
· Has had a full power supply rebuild within the last 3 years, modern capacitors & rectifiers with better specs than the OEM 1981 designs.
· Several other internal items were replaced along with the power supply, including: dip switch selector for the voice boards and *ALL* of the potentiometers on *ALL* the voice cards have been upgraded to the multi turn, “box” style as opposed to the original single turn “dial” type potentiometers. Huge difference in calibrating and holding precise values.
Most of the Oberheim classic sounds are factory presets in this fabulous instrument. It will ship with a power cord. The unit should warm up for about 15-30 minutes before use even though it tunes fine at first power up. The units will be double boxed for protection in shipping. The main unit is also very heavy."
Simple solid clock sync! The Missing Link & ML:2 (Ableton Link) // Circuit Happy at Knobcon 2023
video upload by DivKid
"Giving the demo without any audio to listen to is a big move. A bold move made possible by rock solid behaviour from the devices from Circuit Happy. We have The Missing Link Junior and ML:2 Eurorack modules that are both Ableton Link enable devices for not just clock sync and reset but bar position aware behaviours for triggering and syncing to the patterns too. Impressive all round."
All parts here. See the post labels below for more.
Better Spring Reverb! (with more filter features than your filter?) // Bubblesound at Knobcon 2023
video upload by DivKid
"It was great to meet David from Bubblesound at Knobcon 2023. I've been a long time user of his modules and he's consistently made quality modules over the years. The upcoming Spring Reverb module looks at Spring Reverb options in existence and aims to make them better, a fully featured SEM style multimode filter is on the module so you can really shape what's going into the physical spring, changing it's behaviour and sound. There's on board feedback which David is leaning into in this video too for more experimental patching."
All parts here. See the post labels below for more.
A Modular Approach to Eurorack Mixing with BARTENDER & BARBACK // After Later Audio at Knobcon
video upload by DivKid
"Here we have several new modules from After Later Audio from Knobcon 2023. Lenny takes us through Bartender, Barback and Cast Iron which make up a new expandable, modular approach to Eurorack format mixing."
All parts here. See the post labels below for more.
Patch Tuesday | Glistening Arps | Route 4, Delay 1, Generate 3
video upload by Joranalogue Audio Design
"This week on Patch Tuesday: Glistening Arpeggios
Our main sound source is a Generate 3, receiving pitch from a MIDI-to-CV keyboard. Mix 3 is used as a VCA, being modulated by one Contour 1. The two other Contour 1s accentuate the sound by opening the VCA even more. Their inverted signal is sent to the control inputs of Route 4, producing arpeggios.
The extra flavour in this patch comes from Delay 1, clocked by filter 8, resulting in beautiful, lo-fi arps."
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© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH