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Jolin Lab Tabor Eurorack Rhythmic Oscillator Module (Black Orb)


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Product Info

TABØR is a rhythmic analogue sound and CV source based on the unpredictability of four avalanche transistors in a continuous oscillation state.

These unpredictable core oscillators are related to each other and their charge and discharge cycle creates complex rhythmic sound textures that can be controlled and triggered with external CV inputs to add more contamination.

With this circuit we can obtain rhythmic textures- intended as rise pulses – and different tone heights by mixing the colors of the LEDs and the values of the capacitors. The waveform of a single oscillator, unfiltered, is basically a sawtooth. The result of the FM modulation of the whole sound engine is chaotic.

Four avalanche oscillators with two controls each:

F: regulates the distance between the spikes of the single sawtooth waves – their rise pulses frequency
M: the amount of cross-modulation of each core within the others

Each oscillator can be identified thanks to its color and it can acts differently depending on the state of the others:
OSC1: the most percussive and predominant, the fundamental modulator
OSC2: obedient to OSC1 rhythmically and its direct subsidiary – a carrier
OSC3: strictly related to OSC2 but can set-aside OSC1 as a modulator
Due to its autonomy from the fundamental OSC1 and to keep the communication balanced, OSC3 doesn’t have the F and M control potentiometers. Its values can be changed only with external CV input
OSC4: it can act as a shutter to filter or interrupt the whole communication

these variables can all be controlled individually with vactrol CV inputs

Visually you can see the “beating” oscillators in the hollow circle in the middle of the module.

To start oscillate and communicate the sound engine needs around 16v to 22v and any value below that point will stop hierarchically its operation:

RM: this input act as an attenuator to the oscillators, limiting their power supply
A dummy cable will shut down the oscillators due to the inverted-vactrol configuration of this input. The RM input can be used as an internal voltage-controlled-attenuator, a VCA

The result of the whole sound engine is given in three different outputs:
TR: a “squarified” always positive 0-7v trigger / cv source
This output is not always active, it fires triggers when the avalanche engine reaches a certain threshold: blue LEDs blinking
NM: the dry mixed audio signal straight out of the oscillators
ZZ: an auxiliary fuzzed envelope output from the internal diode-based distortion circuit

  • T12 HP
  • T29 mm deep (Through-hole Full Kit 45mm)
  • T65 mA +12V
  • T7 mA -12V
  • T0 mA 5V

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