MATRIXSYNTH

Oberheim Viscount Joint Venture OB-12 Synthesizer

METASONIX TM-1

via this auction
"World's first vacuum-tube audio ring modulator for music production, plus all-tube waveshaping. Very complex distortion effects. 100% compatible with other analog synths. Unit usable standalone or may be mounted in a 5U-high modular synthesizer system.

Controls
* Input Level
* Pulser Stability
* Beam Tube Screen
* Ringmod Osc Pitch
* Activate Ringmod

Sockets
* Audio Input
* Audio Output
* Beam CV
* VCA CV
* Ringmod Carrier
* Frequency response: less than 10 Hz to greater than 40 kHz
* Distortion: from less than 0.1% to 100%, depending on control settings and input waveform
* Hum and noise: less than 0.5 mV
* Power input: 10 - 12 volts AC, 50/60 Hz, 0.8 amp at idle
* Inputs: phone jacks for audio input; optional inputs for beam-tube CV, VCA CV, and ring-modulator external carrier (requires at least 20v p-p signal for full effect) Output: audio (mono)
* Dimensions: 7 1/2" (192mm) x 4 3/8" (112mm) x 3" (77mm)
* Weight (not including accessories): 5 pounds (2.2 kg)

'The Metasonix TM-1's circuit is directly derived from the award-winning Metasonix TS-21 "Hellfire Modulator".

The pentode preamp gives pure tube distortion, from soft and creamy to screaming guitar-amp like leads. Just crank the input volume.

The "pulser" circuit injects small, badly-formed pulses on top of the signal, giving an effect roughly similar to very erratic (and violently unstable) VCO sync. Forget getting this effect from another synth, analog or digital; they just can't do it. It sounds out of control, yet it is easily tweaked over a broad range with the PULSER STABILITY knob. Subtle, or gross; a vast range of sonic manglings are at your fingertips. (The pulser circuit works best with sharp-edged electronic waveforms, especially those from digital synths or analog VCOs.)

Finally, a special beam-deflection vacuum tube gives both wavefolding and ring modulation (carrier is provided by an internal wide-range oscillator, or inject your own carrier signal). There is nothing quite like the crossmodulation produced by the beam tube, its nonlinearities and resulting tonal effects are distinctive. Crude and NASTY, too.

TM-1's pulser effect uses a positive feedback loop, so the circuit is not stable under all settings. This allows its use as a self-contained pseudorandom signal generator, by patching its output back to its input. You've read about "strange attractors" and other chaotic sound generation techniques? The TM-1 is the first all-tube chaotic sound generator. The results must be heard to be believed!'"

The Harvestman Tyme Sefari Eurorack Module Demos

Tyme Sefari Full Demo including "A Sound Of Thunder".

YouTube via genxtargetmarket | February 24, 2010 | 5 likes, 0 dislikes

"A demonstration that goes through every single function of the Tyme Sefari and the optional "A Sound Of Thunder" expansion module. The ASOT is a circuit-bending expansion that connects to the Tyme Sefari via a ribbon cable on the back of both units. Nobody except its creator knows exactly what is going on with each bend. Just buy the damn thing. It's only 45 bucks! And it'll even wash your old worn-out EconoChrist T-shirts for you."

Harvestman Tyme Sefari Loop Start and End points demo

via this auction
"Tyme Sefari is a voltage-controlled sampler/delay/looper/audio buffer developed completely in-house by The Harvestman.

Using an 8-bit microcontroller and 32kB of SRAM (no prefab delay chips here), Tyme Sefari allows you to circularly record an 8-bit audio sample, with voltage control of sampling frequency. The analog front-end of the module has a wet/dry mix control as well as a feedback attenuator (with selectable polarity).

You may optionally set two loop markers within the greater recording. When enabled, the record and playback travel will only take place between these markers. When the loop points are "inside out", interesting distortions of the buffer contents occur when the marker controls are swept. Both marker controls are manual and voltage-controllable.

The transport controls of the Tyme Sefari allow you to control recording, record/playback reverse, loop enable, and playback (when toggled, this control restarts playback from the beginning of the recording or loop for easy one-shot sampling.) All four of these controls can be controlled by external gate voltages in addition to the panel switches.

The Tyme Sefari is expandable with a series of switches for "circuit bending" the behavior of the module, model 1973A "sound of thunder". These switches short out parts of the data and address busses, resulting in effects just like a modified Casio SK-1. The glue logic within the Tyme Sefari is laid out in a similar way to the SK-1, so the changes in sound are quite similar. However, the front-panel operation of Tyme Sefari remains predictable when the expansion is active."

Blacet Mini Wave with Rare Plan B Faceplate

via this auction

"Blacet Mini wave eurorack module WITH the rare Plan B eurorack faceplate and voltage converter. Already assembled so just plug it in and play! the original Blacet face is also included in this auction. The Plan B faceplate as you can tell has stickers on it. Reason for this is the Plan B faceplate was incorrectly marked, so have made corrections to save you the hour long headache i had."

video at the auction and previously posted here.