MATRIXSYNTH

ARP QUADRA "La Croix"

"(c) 2014 vintage synthesizer demo track by RetroSound
all sounds: ARP QUADRA Analog Synthesizer (1978)
drums: KORG KR-55B (1982)"

serge pulse sequencer pt 2

Published on Aug 14, 2014 Todd Barton

"a subtle variation on my previous demo: http://youtu.be/2Oil6sITtu8
for better audio: https://soundcloud.com/user7621213/se..."

Taide'n Borg - Something ... just say something

Published on Aug 14, 2014 Sun's May Flower (Official)

"Equipment:

Bass - Korg Monopoly
Poly synth - Roland Super JX 10
Syn Lead - ARP Odyssey
Strings - Solina String Ensemble
Drums - Akai S 900
Vocoder - Korg DVP 1

Effects :

Reverb - Fostex 3180 Spring Reverb Unit
Analog Delay - EEM 2000 ST"

Blue EML ElectroComp 100 Synthesizer with Extras Including Flexi Disc

Note: links to listings are affiliate links for which the site may be compensated.

via this auction

"Condition: Used (but very good condition considering its 45 yrs old)

Seller Notes: “VERY VERY RARE ..” (Much more rare than the EML 101)

Brand: ELECTRO COMP

Number of Keys: 44

Model: EML 100

Country/Region of Manufacture: United States

Type: Synthesizer

This EML 100 Synthesizer is vintage and very very rare. Less than 100 of them made in 1970/71. It is the predecessor to the EML 101. It is in good working condition. It comes with the User's Manual, 2 original patch chords and the 33 1/2 LP provided at original purchase (The Sounds of E.M.L. Synthesizers). It also comes with a 13 page EML 101 electronic schematic and a 13 page Alignment Procedure of the EML 101 which was the mass produced version of the EML 100.

Patches shown in the User Manual have been setup and verified.

Very few blemishes. Slight corrosion on metal latches (not bad). Very few scratches on outer case. Keys in perfect shape. A couple pots could use some use or cleaning..."

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Groove Electronics MINI-CV MIDI to CV Converter

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via this auction

"Here's a quite obscure and rare British-made MIDI to CV converter - I have had this working and it seemed to track over a small range but I didn't spend much time experimenting with the scale/tuning trims. Due to the condition (it's metal construction but the body is quite worn and a few bits are a little warped) and having not explored it hugely, it's got to be sold as seen.

Features:
MIDI IN Port
MIDI Thru Port
MIDI Channel Select Trimmer
3.5mm "GND Trig" Output
3.5mm "+VE Trig" Output
3.5mm Control Voltage Output
Tune Trimmer
Scale Trimmer
Doesn't include PSU - it requires 12V DC Negative Tip, Positive Ring"

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Sequential Prophet 5 rev2

via this auction

"There are 3 distinct Prophet 5's, the rev 1, rev 2 and rev 3. To be honest I have never seen (or even met someone who has seen) a rev 1....so if you want a Prophet the choice is pretty much between the rev2 and rev3. The major difference between the rev2 and the rev3 is that the rev2 uses SSM chips and a lot more discrete components and the rev3 uses Curtis chips. The rev2 is the the better sounding of the two with a more organic sound, though back in the day the rev3 was much more reliable....so bands tended to use rev2's for recording and rev3's for touring.

The rev2 reliability issues were primarily down to tuning, this was down to a transformer that got very hot (have a look at the size of the heatsink!)...i.e. thermal drift and the fact that the voltage control DACs for the oscillators were made with discrete resistors. Nothing actually wrong with building DACs with discrete resistors except that you need to use very precise and matched resistors....which weren't readily available in the 80's. These days ridiculously precise "ppm" (part per million) resistors are available for not too scary money. So the internals circuitry has been changed to incorporate the better resistors (and a few other more modern components) and a modern over-rated toroidal transformer to ensure that the tuning and reliability is as good, probably better than any rev3.

The rev2 is very rare, with only 200 having ever been made and is an incredibly beautiful sounding machine. This version is in very good condition, apart from a dint or two on the woodwork and pretty bad silk screening on the mod panel. I am at the moment considering building a totally new hardwood cabinet, re-screening the mod panel and fitting Kenton MIDI...this will however add well over £1000 to the price so I thought I'd put it up for sale as is....as I'm a bit buzy at the moment and someone could grab a bargain.

Tested, serviced and recalibrated by James at Synth Repair Services."