MATRIXSYNTH


Wednesday, October 06, 2021

Roland Jupiter 4 SN 861392

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via this auction

"As you can see on the serial number this synth is from september 1979, which means that it is one of those with the much sought after BA662 filter."

ARP AXXE Vintage Analog Synthesizer 2323 SN 0090

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via this auction

"Great playing arp axxe. Early 2323 green badge model. Has what may be original wood sides. Cosmetically not perfect, see pictures. Most noticeably has some old tape residue.

Lots of service. Original controls broken down and cleaned. Keyboard rebushed. Capacitors and some electronic components replaced to ensure operation within factory spec for years to come."

Ensoniq VFX-SD Polyphonic Synthesizer + 24-Track Sequencer

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via this auction

Korg Mono/Poly Analog Synth SN 373292

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via this auction

"Original 1980s unmodified classic,

"Four voltage-controlled oscillators (VCOs) and a noise source are routed through a voltage-controlled filter (VCF) and voltage-controlled amplifier (VCA). It can be used as 1) a four-oscillator mono synth; 2) a four-voice paraphonic synth, with voices cycling through oscillators but sharing a VCF and VCA; 3) a shared mode using mono mode for single notes, dual oscillators per note for double notes, otherwise paraphonic mode; 4) a chord memory which results in a mono synth albeit with four oscillators playing notes of up to a four-note chord.

The four VCOs have controls for independent tuning, footage (16, 8, 4, 2), waveshape (triangle, saw, pulse-width, and pulse-width modulated), and amplitude. These are implemented with SSM2033 chips. Portamento may be used for VCO frequency. The noise source has a level control. [1]

The single VCF is a 24/dB octave low-pass filter, with controls for cutoff, resonance, scaling, and invertible envelope control. It can self-oscillate, and be scaled 1:1 with frequency, and thus used as a fifth oscillator. It is implemented with the SSM2044 chip.

There are two envelopes. One is dedicated solely to the VCA. The second in nominally the "VCF envelope" but can additionally control VCO pulse-width, all VCO's pitch, pitch only of VCO's 2 and 4, and frequency modulation amount. The envelopes share controls for single or multiple trigger, and damping.

There are two low-frequency oscillators (LFOs), called "Modulation Generators" (MGs) by Korg. The first has control over waveform and speed, and can be routed to VCO pitch or pulse-width, VCF cutoff, and frequency modulation amount. When controlling VCO pitch, it can control all VCOs; VCO 1; VCO 2, 3, and 4; or VCO 2 and 4. The second only has a control for speed, and can control the arpeggiator or VCO pulse-width.

There is an arpeggiator with on/off/latch control, up/down/up-down pitch control, and 1/2/full keyboard control.

The Mono/Poly includes extensive and significant modulation capabilities between the oscillators, grouped in a section captioned "Effects." These include the abilities to: 1) sync VCO's 2, 3, and 4 to VCO 1; 2) sync VCO 2 to 1, and 4 to 3; 3) to frequency-modulate VCOs 2, 3, and 4 with VCO 1; 4) frequency-modulate VCO 2 with 1 and 4 with 3. Oscillator sync and frequency modulation can be used together. This ability to have 1 master with 3 slave oscillators, or 2 each, is leveraged by the bewildering variety of oscillator subsets that can be controlled with modulation sources and wheel controls.

External inputs and outputs are provided for CV/Trigger, VCF and VCO mod inputs, arpeggiator, and portamento. The pitch bend and mod wheel can be assigned to control pitch of all VCOs; VCO 1 only; VCO 2, 3, and 4; or VCO 2 and 4. The pitch bend range extends to 2.5 octaves for VCO pitch, and the audio range for VCF cutoff."

Roland SH-1000 with Flight Case

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via this auction

MOOG Rogue Synth SN 6775 w/ Original Box & Docs

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via this auction

"Includes Rogue Model 342A, Box, Foam, Power Supply, and Papers."

1983 KORG Poly-61 Programmable Polyphonic Synthesizer

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video upload by keyboard resource



via this auction

"Works good. Some damage to bottom edges. Joystick is bent. Number 1 button sometimes re-triggers. See pictures.

This was Korg's answer to the Roland Juno-60 and it looks like a Juno-106 but the Poly-61 is more interesting in many ways.

Features:
- Six-voice polyphonic analog synth with digital controls
- Two digitally-controlled oscillators using square/pulse or saw waveforms
- Arpeggiator with latch, one-, two- or full octave range and up, up/down or down modes
- Polyphonic and Chord Memory/mono (unison) modes
- Hold button (any key pressed stays on until polyphony reached or turned off)
- Pitch bend joystick with DCO (pitch) modulation (up) or VCF (filter) modulation (down)"

YAMAHA TENORI-ON w/ Extras

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via this auction

·Accessories
Manual(Japanese)
AC Adapter(Japan Type)
CD-R
Cable
Box

YAMAHA DX5 w/ Sound Carts

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via this auction

KORG Polysix // A Vintage Bargain? // Walkthrough and Demo


video upload by Starsky Carr

0:00 demo track #1
2:12 overview
3:12 some presets
6:22 oscillators
14:26 filter
20:01 envelope
22:03 LFO
25:07 Effects
31:29 arpeggiator
35:16 key assign modes
40:15 final thoughts
41:37 demo track #2
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