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Arpeggiator

This program plays ascending and descending quantized scales/arpeggios.

For simplicity, the term "arpeggio" is used below, even though it is technically inaccurate from a musical perspective.

Inputs & Outputs

Inputs:

  • b1 and b2 cycle through the available arpeggios. All notes in the indicated scale are played
  • din is a trigger input that changes the current note of the arpeggio
  • ain is a CV output that takes 0-10V, allowing transposition control over the root note. Note that the octave of the transposition is ignored; only the quantized semitone is applied
  • k1 sets the root octave (0-5 octaves)
  • k2 changes the octave range (1-5 octaves)

Outputs:

  • cv1 outputs ascending arpgeggios with ascending octaves (e.g. C0 E0 G0 C1 E1 G1 C2 E2 G2 ...)
  • cv2 outputs ascending arpeggios with descending octaves (e.g. C2 E2 G2 C1 E1 G1 C0 E0 G0 ...)
  • cv3 outputs random notes from the arpeggio, with ascending octaves (e.g. {C|E|G}0 {C|E|G}0 {C|E|G}0 {C|E|G}1 {C|E|G}1 {C|E|G}1 ...)
  • cv4 outputs descending arpeggios with ascending octaves (e.g. G0 E0 C0 G1 E1 C1 G2 E2 C2 ...)
  • cv5 outputs descending arpeggios with descending octaves (e.g. G2 E2 C2 G1 E1 C1 G0 E20 C0 ...)
  • cv6 outputs random arpeggios with random octaves (e.g. {C|E|G}{0-2} {C|E|G}{0-2} {C|E|G}{0-2} ...)

Note that if the octave range is set to 1, cv1 & cv2 will have identical output; cv4 & cv5 will have identical output; and cv3 & cv6 will be randomly chosen from the same range of notes.

Changing scales & transposing

Changing transposing by either changing the root octave, octave range, or applying CV to ain will apply the new settings on the next clock tick. This prevents the output from changing between clock pulses.

Similarly, pressing b1 or b2 to change the arpeggio will apply the new set of notes on the next tick. Changing the arpeggio will also reset the octaves & notes to their initial values (e.g. cv1 will return to the root octave and play the first note of the new arpeggio on the next tick)