1980's Crumar DP-80 Dynamic Piano w/ Filter Section

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Crumar DP-80 (Circa 1983) Published on Sep 17, 2012 JESIΛH

"Just demoing my new keyboard. Its a very rare Crumar DP-80 suitcase keyboard. Circa 1983."

Update: demo of one above in via Steve Hofer.

via this auction

"This particularly rare Crumar is a 73 key Italian-made synth produced in very small quantities from 1983-86 with a warm and nuanced tone. The keyboard features built-in tremolo, as well as a "Free Filter" section and six preset buttons. All functions work as they should, and this keyboard comes complete with the original music stand and expression pedal."

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ARP 2600 Complete System Mk1

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"Arp 2600 Mk1, the famous 2600P version grey/black with Moog filter
It's the release most wanted about its awesome filter and feauteres.
It has its native keyboard, transport cover lids, original manual and original patch cables
For sure the best Arp I have seen, Near Mint, NOT modified, really genuine and valuable along the time."

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Yamaha FS1R SN PIO1290

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"For sale is a Yamaha FS1R rackmount FM/Formant synthesizer. This is a beast of a hardware synth, with formant capabilities that aren't found in any other rack synth of its type. It also has an excellent digital effects processing engine and a really cool filter as well..."

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Rare CASIO Casiotone FK-1 PEDAL BASS SYNTHESIZER

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You don't see these often. In fact, I believe the Casio FK-1 has only been mentioned here on MATRIXSYNTH once back in April of 2008 in this post on the Casio Symphonytron 8000.

Curious what these sounded like. I did a quick search on YouTube but couldn't find any demos. If anyone out there knows, feel free to share.

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Moog Modular 15 Clone, MOS LAB SYSTEM 8A

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"System consists of the following.

1 x Case & Power Supply

1 x 921 Module is a control voltage processor wich runs associated 921-B oscillators through internally wired connections.
Two voltages are generated : One for frequency control (3 Inputs) One for rectangular wave duty cycle control (2 Inputs)

2 x 921-B module provides 4 waveshapes : Saw / Triangle / Pulse / Sine
Frequency : semi-fine tune over 2 octaves. Picth selection over 5 octaves + LOW position
2 linear modulation input : A.C Modulate / D.C Modulate. 1 Synchro input

2 x 911 Envelope Generator
This module produces a single voltage contour whose time/voltage variation is determined by pot T1, T2, T3 and a time constant sustaining level pot (Esus).
​T1 : Rise time 2ms to 10sec
T2 : Initial Decay Time 2ms to 10sec
T3 : Final Decay Time 2 ms à 10sec
Esus : sustain 0 to 5.5V

1 x LP Filter
Fixed control voltage, Frequency Range (about):
1- 1Hz to 5kHz
2- 4Hz to 20kHz
3- 16Hz to 80kHz
Regeneration : Resonant peak will break into oscillation at clockwise settings of the regeneration pot 3 modulation Inputs.

1 x VCA
902 VCA module is a differential Input / Output circuit which a gain of 2 (6dB)
​Switch for select between Linear mod or Exponential mod
3 modulation inputs"

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Roland VP 330 Mk II Vocoder

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Yamaha CS-10 Vintage Analog Synthesiser SN 5348 with Original Case

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Roland CR-5000 SN 122069

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"Classic roland cr-5000 compurhythm drum machine in perfect working order. No scratchy pots tested with no issues."

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Studio Electronics SE-1X with Step Poly Arp (Line Recorded)

Published on Dec 26, 2016 Bon Lucas

"There's not enough demos of this synth line recorded! Me tweaking presets on the SE-1X with Presets from Step Poly Arp Sequencer iPad app. Ran through an Ensoniq DP-Pro Effects Processor."

ASR 10 Art of Transwaves

Published on Jan 19, 2014 zorglub667

"Some Demos from the Art of Transwaves CD for the ASR 10. No Processing applied, all synthesis is pure ASR 10 transwave glory. Even though it had no knobs for realtime control and you had to use more "regular" modulators like the 2 wheels, poly aftertouch, envelopes, LFOs etc, it remains the most powerful transwave synth Ensoniq ever made. Plus the ability to turn any sample into a transwave. Good stuff :-)"