Pittsburgh Modular Voltage Lab 2 - Page 56

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Pitch Chance
The pitch chance effect is responsive to the touch controller’s assigned key and scale. Both the likelihood of a chance
effect triggering, and how drastic of a change it will be are increased as you turn up the corresponding channel’s
[CHANCE KNOB], red or yellow.
The percent chance that a pitch change is triggered increases as the [CHANCE KNOB] is turned up, from 0-95%
As you turn up the [CHANCE KNOB], the amount of pitch change is controlled in 3 “sectors”, where the bottom sector is
the bottom third of the knob(0-1.66 V), the middle sector is the middle third of the knob(1.66-3.33 V) and the top top
sector is the upper third of the knob(3.33-5V). This can also be modulated with each channel’s [CHANCE CV IN JACK], in
which case the [CHANCE KNOB] will act as an attenuator for the incoming signal.
As you move through the sectors, you gain access to different partials based on the assigned key and scale.
Pitch Chance Scalings
Chromatic:
▪ Bottom Third of [CHANCE KNOB]:
• - 1 Oct 50% of the time
• + 1 Oct 50% of the time
▪ Middle Third of [CHANCE KNOB]:
• - 1 Oct 16% of the time
• - 8 semitones(major third under) 17% of the time
• - 5 semitones(perfect fifth under) 17% of the time
• +4 semitones(major third over) 16% of the time
• +7 semitones(perfect fifth over) 17% of the time
• +1 Oct 17% of the time
Chromatic:
▪ Upper Third of [CHANCE KNOB]:
• - 1 Oct 8% of the time
• -9 semitone(minor third under) 9% of the time
• - 8 semitones(major third under) 8% of the time
• -7 semitones(perfect fourth under) 8% of the time
• - 5 semitones(perfect fifth under) 7% of the time
• -1 semitone(perfect seventh under) 8% of the time
• +3 semitones(minor third over) 8% of the time
• +4 semitones(major third over) 9% of the time
• +5 semitones(perfect fourth over) 8% of the time
• +7 semitones(perfect fifth over) 8% of the time
• +11 semitone(perfect seventh over)9% of the time
• +1 Oct 7% of the time
Major or Minor:
▪ Bottom Third of [CHANCE KNOB]:
• Selects (major/minor) 3rds, fifths, and
octaves with equal likelihood.
▪ Middle Third of [CHANCE KNOB]:
• Selects (major/minor) 3rds, fifths, and
octaves with equal likelihood.
▪ Upper Third of [CHANCE KNOB]:
• Randomly selects a note in the key
Micro-tonal:
▪ Bottom Third of [CHANCE KNOB]:
• Randomly adds or remove full octaves
▪ Middle Third of [CHANCE KNOB]:
• Randomly adds or remove full octaves
▪ Upper Third of [CHANCE KNOB]:
• Randomly picks any allowed note
4 Voltage Lab 2 Touch Controller