The Dual Random Voltage Event Generator (Dual RVG) is a faithful replica of the vintage EMS Random Voltage Generator. It is an all analogue design which generates two separate random voltages that can be timed either from the internal LFO or from an external clock. However, one of the most interesting features is that varying amounts of randomisation can be added to the internal clock rate with the Time Vary control – so with this we can randomise time period in addition to voltage.
The TR-IN input allows an external clock to be used instead of the internal LFO. When the LFO is stopped two new random voltages can be generated with each press of the manual Trigger button.
We have added many useful features that were not present on the original design, including Level and Offset controls for both outputs, adjustable Slew on Output 1, control of internal LFO run / stop from an external Gate signal, control of LFO rate using an external CV, and the LFO output is brought out to the front panel as both a Sawtooth and Triangle wave and both of these waveforms are skewed as Time Vary is added to the LFO rate. We have also added a gate output that produces a gate for each internal clock pulse, and this gate length changes in proportion with the time variance. The duty cycle of the gate can also be varied from 1% to 99%.
Specifications
- Width: 14hp
- Depth: 26mm
- Power: +12V 95mA / -12V 70mA
