Xaoc Devices Hel - Polyphony Voice Control Expansion Module for Odessa
Hel is a simple, universal expander for polyphonic oscillator modules from Xaoc Devices, such as Odessa. It allows you to freely control up to five voices of polyphony via individual 1V / Oct inputs.
On it's front panel, Hel offers five Voices CV inputs that accept 0 - 5V. The inputs are scaled in 1V / Oct and each of them offers an independent control over a single voice, which is detuned with respect to the base tuning of the oscillator that may also offer it's global 1V / Oct input. The actual number of voices depends on the capabilities of the oscillator. For example, Odessa offers 1, 3 or 5 voices.
The inputs of Hel are quantised in a chromatic scale (every change of 1/12 V corresponds to a semitone). Please note that the Spread controls in some modules (eg Odessa) determine the degree of symmetric detune of the unison voices when Hel is not used, but they are still operational with Hel installed. Turning the Spread knob does not affect the central voice which corresponds to the Root input in Hel. Detuning affects voices 2 and 4 (they are shifted downwards) as well as 3 and 5 (shifted upwards). It is possible to achieve a varying degree of dissonance by exploiting the combined effect of continuous detuning and quantised detuning via Hel.