Vintage Sequential Circuits PRO ONE SN 9303

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Moog Prodigy Synthesizer

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1975 ARP Omni Mark I Model 2483 String Synthesizer

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"It was recently rebuilt by The Analog Lab in New York City. New power supply, all switches cleaned and lubricated. Upgraded 4075 Synth Filter. Wood has some lite wear and the painted metal case is in overall good condition with just a few scratches. Presents well for any collector or vintage studio or for on stage use. Includes Arp Omni literature and Promotional Advertising Vinyl Record. No Case.

Note: Look at the photograph with the tape / glue mark on the back panel near the Synthesizer Output / Low Output jacks. (Pictures 3 and 4). That has been cleaned off without any damage to the painted case of the instrument."

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Arp Solus

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"Specs: The Solus is a 2 VCO, monophonic analog synthesizer with a 3-octave, 37-note (C-C) keyboard. It, like most ARP synths, features mostly sliders instead of knobs. It was built into a flight-case, with all of its inputs and outputs on the inside of the case lid.

Both VCO's feature a slider selecting variable waveforms from sawtooth to pulse, as well as a slider controlling pulse-width and the amount of pulse-width modulation. VCO2 is syncable to VCO1 and can be detuned. The pulse-width can be modulated by the LFO or the ADSR. The VCF (four-pole, lowpass filter) has controls for frequency, resonance, as well as three sliders controlling modulation amount from the keyboard, the LFO, and the ADSR. It also features a digital ring-modulator and a pitch-bend knob. The back panel features interfaces (in and out) for CV, Gate, and Trig. Also in the top panel is a footpedal input and External Audio input, as well as high and low outputs."

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Arp 2600 - Phil C Upgrade/Service SN 0801

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"Rare Arp 2600 - Fully restored internals - Upgraded to better than new!

If you are looking at this listing you already know what makes the Arp 2600 classic,so I'll just tell you about what makes this Arp different from the rest!

Service/Refurb/Upgrades comprising of the following work...

Console:
Power supply upgrade
Reverb tank upgraded with 17" tank
APU upgrade
VCA upgrade
4072 filter 4012CX ARP ladder filter upgrade
All sliders chemical bath and lube
1 reverb cable microphonic replaced
84 rusty 1/8th jack washers replaced
84 rusty 1/8th jack nuts replaced
VCO3 slider in vcf mixer rebuilt
Front panel, boards, inside, and lid cleaned
Full calibration

Keyboard:
Oxidized connector clean and burnish * $35.00
Stiff sliders recondition
CV output erratic clean and burnish key contacts
Rusty jack washers and nuts replace
Rusty black hardware replace
Dirty panel, keys, inside, lid clean
Calibrate

All of this work was carried out by Phil Cirocco in 2013 [CMS], since then the synthesizer has seen relatively little use and has spent it's time in a smoke free home studio. So functionally it's better than new."

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Paia 9700 test

Published on Mar 2, 2016 RELOAD

"Only Paia Sound and a kick...."

Why can I never have enough VCAs? Part 3 - Wrapping up modulation and a few other pointers.

Published on Mar 2, 2016 Frank Murder

"Why can I never have enough VCAs? Part 3 - Wrapping up modulation and a few other pointers.

We look at the Intellijel MicroMod2 or uMod II."

All parts here.

Adventures in Synthesis: Pure Data drum machine + DIY modular

Published on Mar 2, 2016 Chris Beckstrom

"More about this project:
http://www.chrisbeckstrom.com/portfol...

Get the drum machine code here:
https://github.com/chrisbeckstrom/pur...

I've been building a Pure Data - based drum machine / sequencer that runs on iOS using the fantastic MobMuPlat iOS app. Basically it lets you run Pure Data on your device and allows you to build a GUI for it. This is the first patch that uses my new drum machine. It's still a work in progress, but many of the features work.

Why build my own drum machine when there are so many great-sounding iOS apps and other software synths available? Because why not! None of the apps I've tried have the exact features I want, so I'm building my own. In my Pure Data programming I'm keeping to my DIY modular aesthetic: simple modules, analog-style sound, and basic waveforms that can be manipulated and combined.

Here's an early morning jam featuring the CB-100 Sound Sequencer (tentative name) combined with my DIY modular synth.

Patch notes:
The left channel of the iPad audio output is the master output from the drum machine, and the right channel is a very short pulse on every 16th note. This pulse is patched into an amp in the modular and then used to clock the sequencer, clock divider, and various envelopes.

The drum machine goes into a preamp to get it up to modular level, then into a mixer. I'm always amazed at how nice and warm things sound when you run them through even a single analog gain stage! Straight out of the iPad the drum machine sounds pretty digital and cold, but that preamp warms it right up and adds some crunch when turned to 11.

The sequencer is set to open a VCA every 8 16th notes (on 2 and 4); the input of the VCA is the drum machine and the output is patched to the delay. Basically that means the delay only gets signal on 2 and 4, which I think sounds cool. (It's not exactly JUST on 2 and 4, because the VCA is a double vactrol VCA, and when one LED is turned on it has a tendency to bleed through the loads of electrical tape and influence the other VCA. Ah, such is the DIY experience!).

The sequencer modulates the frequency of a single saw oscillator, which goes into the low pass gate before joining the other sounds in the mixer.

The drum machine clock goes into a clock divider, and four of those outputs go into an R/2R ladder to generate CV to modulate the frequency of a square oscillator. That oscillator goes into another VCA, then into the mixer to join the other signals.

I have a few square waves going into a diode-based pseudo-ring modulator which then goes into yet another VCA (you can never have too many VCAs!!). This VCA is opened by me pressing a button on the far left of the modular, which sends 9V to the VCA and lights the vactrol LED. The button also sends a trigger to an A/D envelope generator which controls the pitch of one of the oscillators, which adds some nice pitch variation like some sort of weird drum.

Finally, the output of the whole modular gets split into two paths: one directly into the mixer, and another into an Alesis Microverb II digital reverb unit spitting out 2 channels of delicious lofi digital reverb. These three channels (reverb + modular) are mixed together and head into the computer onto a single stereo track in Bitwig Studio."

Author & Punisher @ Elektron Studios

Published on Mar 2, 2016 Elektron

"Tristan Shone aka Author & Punisher stopped by Elektron Studios for a performance and a quick chat."

Korg Minilogue Sonic LAB Review - Envelop Re-trigger Fix?

Published on Mar 2, 2016 sonicstate

"We review the affordable analogue four voice poly synth from Korg. And show you how to fix the envelope retrigger issue [At 4:05]" See this post for reference.

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