sound design

z22 Soviet EFFECT PROCESSOR ESKO-100 guitar synth pedal

via this auction"Read here about its functions [link] Check out my other items!""Esko 100 is an effect processor with digital delay. Another version of Esko 100 features tape delay. Knobs on the upper panel: Modulation depth max/min, modulation depth max/min, reverb/flanger, record/memory. Made in USSR."

KORG Polysix

via this auction"Korg Polysix (61 keys) from 1981 in good condition. This is a true analog piece that sounds original. The Polysix has warm-sounding real analog oscillators, softer and brassy-er sounding that the Juno. Engage the built-in Chorus on a simple single-oscillator sawtooth patch and you were pretty darned close to that expensive Prophet sound. But the big ace in the Polysix's hand was the Ensemble effect. Instant Mellotron-like strings. 6 voice polyphony, 1 VCO per voice (saw, PW, PWM) + 1 sub-oscillator per voice, 1 LFO assignable to VCA,VCF or VCO. Chorus, phaser and ensemble effect. Really good Arpeggiator (Up, Down, Up/Down, Latch; Full, 2-oct, 1-oct; rate 0.2 to 20 Hz)"

KORG Poly-800

via this auction where you'll find more images."The Korg Poly-800 is a programmable synthesizer released by Korg in 1983.Comparable to the Roland Juno and in many ways better, the Poly-800 is an 8 voice polyphonic analog synthesizer with 64 memory patches and up to 50 editable parameters!There's also a stereo chorus effect, a sequencer, and a weird joystick used to adjust pitch, modulation and the filter.There is a double mode in which the oscillators double up making 4 fat voices of polyphony.The Poly-800 could be run off batteries and had guitar strap pegs, allowing a performer to wear it like a guitar.It is because Poly-800 was only 13 lbs."Note the Poly-800 shares one filter across all voices, whereas others have one filter per voice. Where this comes into play is when you assign modulation to the filter such as an ENV. Instead of the modulation running independently for each key pressed it is shared across all keys.

Roland Juno-106

via this auction* Polyphony - 6 voices* Oscillators - 1 DCO per voice: pulse, saw, and square* LFO - 1 with Rate and Delay* Filter - non-resonant high pass and resonant low pass (24 dB/oct)* VCA - ADSR, level and gate* Keyboard - 61 keys* Arpeg/Seq - None* Memory - 128 patches* Control - MIDI (In/Out/Thru)* Date Produced - 1984

stutter box

YouTube via robodelfyvia this auction"ORIGINAL FEATURES+ 2 sound sample buttons, saying the words '1' and '2'+ 2 AA battery compartment (batteries not included)ADDED FEATURES+ Pitch down dial+ Loop 3 way switch+ Loop speed dial+ Stutter dial with On/Off switch+ 1/4'' mono jack output+ On/Off switch+ 4 LED's that flash+ Rubber feet to stop it slipping+ 9v battery holder (battery not included)"

Day Tripper (YMO)

YouTube via denha. via fischek"yuuki is performing Day Tripper."

Spectralis 2 Teaser 2

YouTube via SCHAAFJOERG"Radikal Technologies Spectralis 2It's more fun than compute..."Note Joerg was the man behind the Quasimidi Polymorph which I own. It's a great machine. Extremely intuitive and just an outright pleasure to work with. Highly, highly recommended. If I were buying today, I'd definitely pick up a Spectralis 2. I love this guys approach to synthesis and UI/design. He's a master at sequencing interfaces.

Ibanez AD80 repair. Documenting a ghost in the machine.

YouTube via sounddoctorin. vox continental"Bob Weigel of Sound Doctorin' ( ) shows some of the interesting effects attainable from a classic digital delay unit, the AD80 by Ibanez, during a repair attempt. To clarify what I'm saying about the circuitry in the video, this pedal uses two FET's as alternating switches for the bypass or effect signals. A flip flop circuit turns on one of them at a time and toggles of course when the switch is depressed. I've never seen my breath have quite so much conductivity. I must be eating metal flakes in my diet. Because there are 1M resistors coming from the flip flop voltages (which were quite steady at about 10V on the FET that is supposed to be turned on during the cutting out effect you witness in the video) and attaching to .047uF filter capacitors (grounded on the other side) and to the cathode of a diode, the anode of which attaches to the gate of the FET switch. The voltage at the point where the filter cap is is what was collapsing to a few volts. Even at 8.some volts though there is enough current drain from the gate to shut off the FET switch. But I saw the voltage fall to just a volt or two when I was breathing on it. Well the clear cote (a super low conductive paint basically) seems to have done the job at protecting it from ...conductive air :-). If anyone has studied more into this effect let me know."

Treat Yourself :)