Siel Orchestra 2 SN 238/173

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"The SIEL Orchestra 2 is a vintage analog polyphonic synthesizer produced by the Italian company SIEL between 1983 and 1986. An improved version of the original Orchestra, this model offers greater flexibility and sound control, making it a highly sought-after piece for musicians and collectors.

Main Features:

Sound Sections: The synth is divided into four main sections:

Brass: Includes trumpet and trombone sounds with independent attack and sustain controls.

Strings: Features cello and violin sounds with independent attack and sustain controls.

Reed: Adds accordion and musette sounds, expanding the timbral possibilities over the previous model.

Piano: Provides traditional piano, honky-tonk, and harpsichord sounds.

Polyphony: Full 49-note polyphony, allowing for complex chords without limitations.

Additional Controls: The Orchestra 2 introduces several improvements over its predecessor:

An enhanced filter for the brass section with cutoff and resonance controls.

A 5-band graphic equalizer for fine-tuning the sound.

A simple LFO to add modulation effects.

Octave transpose function.

An 'Animator' effect, acting as a flanger to enrich the overall sound."

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SIEL OPERA 6 Vintage Analog Italian Polyphonic Synth

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Siel Cruise

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Siel DK600 Synthesizer w/ Preliminary Dot Matrix Printed Manual

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"If your looking at this then you know what it is. It is a rare, unique, powerful (SSM), and beautiful sounding analog polyphonic synth. It is in good physical and functional condition. It plays well with a few quirks, but thats how these DK's are.

It has been used sparingly in a pet free, smoke free, climate controlled, adult owned home studio. It comes with the dot matrix printed ORIGINAL INSTRUCTION MANUAL! Which I have never seen anyone else have. Its also labeled as 'Preliminary' which is interesting."

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SEQUENTIAL CIRCUITS SIEL Piano Quattro 1983 Black and Silver

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"SIEL Piano Quattro synthesizer piano in excellent condition, working in all its parts.

WITH ANIMATOR AND EQUALIZER, A REAL CHICCA FOR THOSE LOOKING FOR THE TYPICAL SOUND OF ITALO DISCO.

THE AESTHETIC AND FUNCTIONAL CONDITIONS ARE EXCELLENT.

CREATED IN COLLABORATION WITH SEQUENTIAL CIRCUITS WHO PRODUCED IT WITH ITS BRAND IN A REDUCED VERSION."

Note this appears to be the first one featured on the site.

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Siel OR400 Orchestra 2 SN 372/146

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Note the 8 under the 7 in the serial number. Never seen that before.

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SIEL OR400 Vintage Analog Synthesizer

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Siel DK70 8-Voice DCO Polysynth

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Additional SYNTH CITY Listings

"Super underated 8-voice DCO poly-synth from Siel (circa 1985). Classic Italo sounds galore! Includes power supply. Unit was just serviced and cleaned internally."

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Siel Opera 6 w/ SSM Filters

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"The Opera 6 is a subtractive synthesizer with a design based on SSM chips, with SSM2031 for the VCOs, SSM2024 for the VCAs, SSM2056 for the envelopes, and SSM2044 for the filters"

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Siel Opera 6 Siel DK600 - Final Systematic Testing

video upload by tonetweakers

"Here’s the Seil opera 6 (also known as the siel DK600) that we just finished servicing. This instrument was serviced by another tech before our customer bought it. That tech did a bad job, requiring us to waste many more hours fixing what he failed to fix. This is unfortunately common these days with lots of unqualified people trying to save money by doing repairs themselves. As you can see from the video, it’s now in perfect working order. We tend to avoid dealing in SIEL products because the value of the time it takes to properly service things to our standards can exceed the value of the item itself. Here’s a rare opportunity to buy a Siel Opera 6 from us. It’ll be up on our website soon."

http://www.tonetweakers.com

Siel Opera 6 w/ Original Box & Tauntek Firmware

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"Serviced Siel Opera 6 in excellent condition with original box.

New battery, cleaned contact springs, re-capped power supply, some circuit board traces re-made and cleaned.

Factory preset sounds are loaded, the voices are calibrated to specs.

Upgraded to Tauntek firmware for optimized MIDI implementation.

Condition is excellent - with some light oxidation of front panel and a few scratches.

Box has wear and signs of age."

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SIEL 80 Synth Test with Notator MIDI CC's.

video upload by loksync

"Testing out the SIEL80 synth and Notator's Realtime MIDI Generator on the Atari 1040STE.
You can control it's parameters over MIDI CC.
It uses an SSM filter.
I recorded the audio a bit too hot so it clips a bit."

Keytek MDP 40 Midi Digital Drum Machine

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This one was spotted and sent in by swissdoc.

You can find an overview video of the RMP 40 branded version posted here.

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"This is a very desirable VINTAGE, FULLY FUNCTIONAL classic drum machine from the 1980's (released in 1986), the SIEL MDP-40...also known under other brands as the SUZUKI RPM-40 and the KEYTEK MDR-40. It was made in Italy, and features 10 pads for 13 PCM sounds, 3 of which are accessible by external MIDI only. This machine comes with original power supply and owners manual. The unit itself is a desktop model, has LED display, is lightweight (only 1 kg), will also operate on 6 x AA batteries, and has 3 MIDI ports. Audio output is via 1/4" phone jack, mono out. I hate to let this go, but I haven't taken the time to experiment with it in recent years as I had hoped to do, so I'm passing it on. I envision it to be very useful in live performance situations as a trigger machine MIDI'd to a more modern drum machine with tight, up-to-date drum/percussion sounds."

P.S. Moby owned one.

Siel Cruise

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Ultra Rare Synthesizer Kitchen Jam

video upload by CleverJoe Music

"Off the cuff music looping with the Siel DK700 and Arp Pro Soloist synthesizers to help stretch their legs. Both synths have been stored for awhile (the Siel for over three decades!). I'm running both synths through the delay and reverb effects in the Boss RC-505 loopstation. I also have the Siel Expander 80 which I'll explore in a future video."

Follow-up to The Rarest Synthesizer in the World?

SIEL MDP-40

video upload by Samples From Mars

"Download the samples on our Patreon:
https://www.patreon.com/posts/101775452/"

Siel Orchestra w/ Riser Stand

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Thought the stand was kind of interesting on this one.

"Late '70s/ early '80s Siel Orchestra analog polysynth. Same keyboard as the ARP Quartet, which was this synth rebadged for the US market."

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The Rarest Synthesizer in the World?

video upload by CleverJoe Music

"Taking the Siel DK700 out for a spin after some repair work, along with the Arp Pro Soloist to do some looping. The Siel has been in my collection for over thirty years (boxed) and this will be the very first time I've even played it."

SIEL CRUISE Vintage Analog Mono/Poly Synthesizer

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Siel Cruise

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