MATRIXSYNTH

Boxes O' Prophet 12

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"Prophet 12 production is ramping up, lots more boxes heading out to a store near you!"

Roland MC202 Microcomposer SN 339600 with Original Box

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ROLAND MKS-30 SN 460599

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Vintage Paia Oz 3760 Analog Synth Controller

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Pics of the inside below.

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Apple II Plus, Apple IIe and Apple IIGS Echo+ Speech Synthesizer with Software

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"FROM THE INTERNET:
In the 1980s two other popular brands were the Echo II (slot-based) and Cricket (for the modem port on the IIc) synthesizers, made by Street Electronics. These latter also included the ability to produce a robotic voice, a female voice, sound effects, and stereo music. Some games released at the time had enhanced sound output when one of these two devices were detected. For speech reproduction, they used a method of accepting ASCII text from the computer in the form of “phonemes” to describe and produce voice through a built-in speaker. They used this approach because English words have a variety of pronunciation depending on their context. Properly programmed, the voice synthesizers could pronounce the word “root” to rhyme with either “boot” or “foot”. It wasn't until the IIGS came out with the built-in capability of speech reproduction (via the Ensoniq chip) that software making use of that feature became available in any quantity."

Sequential Circuits Poly Sequencer

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"Here is a very nice looking Poly-Sequencer model 1005. It is the sequencer that I understand goes with the Sequential Circuits Prophet 5 synthesizer. Also included is an original Sequential Circuits Pedal which doesn't look as nice as the sequencer due to missing paint and rust. Serial number for the sequencer is 1005-0038..."

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1981 KORG MONO/POLY MP-4 SN 370034

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Roland DG CMU 810 Synthesizer SN 380736

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"This mini synth expander has the same controls as the synth part of Rolands famous MC-202, which is virtually identical to the SH-101, less waveform selection of the mod source. There is a nice audio mixer thrown in to add up to two external instruments, sadly, after the filter. The VCA is switchable between linear and exponential mode, and has a CV in for controlling it from an outside source (ie, I've mapped velocity from my MIDI keyboard, thru a MIDI-CV box to control the CMU's volume). This is a surprisingly strong sounding box." Note there is no MIDI in. You need CV to control it.

PITTSBURGH MODULAR SYNTHESIZER BLOCK

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"Pittsburgh Modular Synthesizers Synthesizer Block Specs & Features

Module components:
Oscillator: voltage controlled waveform generator
Coarse and fine tune rate controls
Frequency modulation CV input attenuator (internally patched to LFO triangle wave)
Pulse width modulation CV input attenuator (internally patched to LFO triangle wave)
Oscillator patch points:
One volt per octave input
Reset input
FM CV input (overrides internal routing)
PWM CV input (overrides internal routing)
Triangle wave output
Saw wave output
Square wave output
Filter: voltage controlled 12db lowpass filter
State variable filter core with voltage controlled cutoff frequency
Cutoff frequency CV attenuverter (internally patched to ADSR output)
Cutoff frequency and resonance controls
Filter patch points:
Cutoff frequency CV input (overrides internal routing)
Audio input
Audio output
LFO: low frequency oscillator
Wide range is perfect for long sweeps or audible rate frequency modulation
Rate knob and Range switch controls
LFO patch points:
Triangle wave output
Square wave output
Envelope Generator: ADSR
4 stage envelope shaper
Attack, decay, release knobs
Sustain on/off switch
Envelope generator patch points:
Gate input
Envelope output
Glide: portamento
Hardwired between the one volt per octave input and the oscillator
Glide amount knob
Mixer: oscillator waveform mixer
Waveform mixer for oscillator outputs
Triangle wave attenuator
Saw wave attenuator
Square wave attenuator
Mixer patch points:
Mix output
VCA: voltage controlled amplifier
High quality, linear voltage controlled amplifier
CV input attenuator knob
VCA patch points:
CV input (internally patched to ADSR output)
Signal input (internally patched to Mix output)
Signal output
Physical specifications:
Size: 28hp
Depth: 35mm
Power usage: TBD
Overview

Pittsburgh Modular Synthesizers Synthesizer Block Overview
Wired for instant access to classic tones without needing a single patch cable, the Synthesizer Block is a complete semi-modular monophonic synthesizer. The Synthesizer Block is 100% analog and 100% eurorack compatible with a complete set of patch points able to override the internal audio and CV signal path.

The Synthesizer Block was designed to be the core of any modular system. Each major component is fully patchable and can function independent to the rest of the module. This allows the functionality of the Oscillator, Filter, LFO, Envelope Generator and VCA to be broken apart and used like standalone modules."