MATRIXSYNTH

ROLAND GR88 NECK THROUGH BASS + GR77B MIDI SYNTH

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Roland TR77 Rhythm Machine

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"Roland TR77 Rhythm synth.
The Roland Rhythm 77 drum machine was Roland's first product (formerly Ace electronics) - released in 1972. It is actually an updated and relabelled Rhythm Ace FR-8L.

It was one of a trio of drum machines released by Roland that year, offering features intermediate between those of Rhythm 33 (TR-33) and Rhythm 55 (TR-55).

It comes in a flat wooden case with a metal base and has a holding for scorebooks - was dedicated to put at top of an organ for rhythm accompaniment.

General Product Information:
Contents
* 1 Rhythms:
* 2 Instruments:
* 3 Some technical inside:
* 4 External Sync

Rhythms:
· Latin: rhumba, beguine, cha-cha, mambo, samba 1&2, bossa nova, baion, bolero, tango
· Rock: rock'n'roll 1&2, slow rock, ballad, western, march, jazz waltz, waltz, cancel
· 2beat & 4beat: bass drum, snare, fox trot, swing, parade, shuffle

Instruments:
Bass drum, snare drum, lo conga, low bongo, high bongo, rim shot, maracas, high hat, cymbal, tambourine, guiro, cow bell. Rim are used for metronome, too.
has a little mixer for: bass drum, snare drum, guiro, high hats.
has a tempo & volume fader; and a fade-out option : for start there's no button, it's a finger-sensitive touch-bar, supports double tempo.
the power switch is not a primary AC-switch.

Some technical inside:
There's no IC inside - only one VCA...
Left: transformer, rectifier, softstart.
Mid: master clock, 5 dividers, reloop & down-beat LED, diode matrix.
The 1st divider is connected to the tempo-up switsch for a 1:1 or 1:2 ratio, the 2nd ones for switching between the 4/4 and 3/4 clock - 1:2 or 1:3 ratio.
Right: the voice board, mixer & output stage. BD, LC, LB, HB, rim are passive circuits.
Bottom: the rhythm switches...
External Sync
There's a little possibility to use din-sync on this device.
Logic board: leftest transistor, on its right the base resistor, solder on lower pin the clock line. For start/stop - its like a pedal switch - just put a transistor serial into the male connector: gnd=emitter, top=collector, base=start/stop line.

Works best at 8 ppm clock, up-tempo off for best results. On up-tempo on the guiro & tambourine it sounds bad as they have a 2nd trigger input which they get from the 1st divider."

KORG MS2000R

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Alesis ION Reversed

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0 feedback, so be careful

Roland MC505 Groovebox

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Key takeaway: Roland owns the term "Groovebox"

"MC-505: Groovebox
Features
The MC-505 Groovebox® builds upon the successful MC-303 as a self-contained, retro-styled dance music sequencer and sound module with powerful new sounds and realtime controls. New features include the revolutionary D-Beam light-sensing controller and a MEGAMix function for intuitive realtime pattern mixing.

* Professional Groovebox featuring high-performance sound engine: 64-voice polyphony, steeper multi-mode resonant filters, front-panel ADSR envelope controls
* Revolutionary D-Beam controller allows for effects and sound/note control via hand movement over infrared light beam
* 714 onboard dance music patterns developed by cutting-edge sound designers worldwide

* 512 built-in sounds and 26 rhythm sets, including the latest dance, hip-hop and techno music sounds and classic drum and synth sounds (TB-303, TR-808, JUNO, Jupiter, etc.)
* Three independent, synchronizable effects processors with powerful new effects
* Onboard arpeggiator
* MEGAMix function allows for intuitive pattern creation by combining rhythms and parts of one pattern with another
* Enhanced MIDI implementation, powerful sequencer section with increased note storage, multiple outputs (3 stereo/6 mono), new assignable part Mixer sliders
* SmartMedia slot accepts external 2MB and 4MB SmartMedia cards for unlimited pattern and patch storage and direct pattern playback"

Sequential Circuits Six-Trak

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Magneticring (synthi AKS) & Osama "Sam" Shalabi

via echo7even

"Feed&Seed Records just released 2 CDrs featuring some music made by humans with rare synths.

Magneticring (synthi AKS) & Osama "Sam" Shalabi

also a rare live recording of Shasta Cults an elusive modular synth duo who use Buchla and Serge performance instruments.

info here"

Moog Prodigy Patch Sheets and Documentation

via echo7even on the AH list:
1 - original owners manual (some spine wear and highlighter inside)
1 - original service docs
1 - Norlin service center list (march 1979)
15 - photocopied blank patchsheets
8 - original sound overlays (synthdrum, heavy hammer, bass, elephant and flea, thin reeds (sync), bowed strings, ring mod effects: gong/chime, sample and gold)
Note these are for sale, if interested contact rick @ echo7even @yahoo.com

ElectroHarmonix Mini-Synthesizer Sample Track

You can find the track on David Kronemyer's blog. Be sure to see the rest of the site for other synth related posts including some words and another image of the ARP String Ensemble, Logan String Melody, and Freeman String Symphonizer below.