Home Premiere Ensembles Godel Transposers

Transposers

November 28, 2009

The instrument contains two parallel transposer units. They both receive notes from the main arpeggiator and chord generators, and transpose them separately before the notes are passed to the final pitch remapping stage.

The transposers can selectively change notes from the original input, the arpeggio notes inserted by the chord generators, and/or chords on the output from the two generators. For example, one transposer can change the arpeggio without affecting the pitch of the chords added to them, and the other can change the chords added to the output, without affecting the arpeggio sequence from the main arpeggiator.

The transposition can repeatedly shift notes up, down, or in various reversing directions, so for example, 3 repeats upwards with a shift of +12 creates transposes the main arpeggiator output by three ascending octaves.

The interval of the shift can be a division of the clock or beat generator; for example, if the interval is set to 1 from the clock, then the transposition occurs on every note; if the interval is set to 2, the transposition occurs on every other note from the rhythm generator; and so on.

If the main arpeggiator's SORT option is OFF, then each of the transposers function as a separate arpeggiator in its own right, shifting the pitch of input notes at the set intervals.

MAIN IN

Enables the transposer to apply its changes to the notes from MIDI input and keyboard.

A IN, B IN

Enables the transposer to apply its changes to the notes input into the arpeggio sequence from each of the chord generators. The chord generator must have at least one of its IN1/IN2/IN3 modes enabled for the transposer to function upon the generated notes.

A OUT, B OUT

Enables the transposer to apply its changes to the chords added to the main output by the chord generators. The chord generator must have at least one of its OUT/OUT2/OUT3 modes enabled for the transposer to function upon the generated notes.

PATTERN

Selects the pattern for the transposition. The available patterns are the same as for the main arpeggiator.

XP

Sets the amount of pitch transposition applied at each step in the transposer pattern.

CLOCK/BEAT

Selects either the clock, or the beat sequencer, as the source of SONGPOS triggers for the transposition.

CDIV

Divides down the SONGPOS triggers from the clock or beat generators. For example, if set to 2, every other trigger received from the clock or beat generator causes the transposer pattern to advance.

STEPS

Sets the number of times the transposition repeats in one pattern cycle. For example, if set to two and XP is +12, then one pattern cycle contains two transpositions: +12, and +24. If set to three with XP set to +5, the transposer pattern contains three upwards shifts of a fifth. The pattern resulting from XP and STEPS is then cycled by PATTERN (forwards, backwards, reversing, optionally in various stagger patterns).

DUR

Sets the amount that the duration of notes changed by the transposer is scaled, as a multiple of the transposer period. The original note duration is always taken from the main arpeggiator. If one is driven by the step sequencer and the other by the clock, or CDIV is different in the transposer and main arpeggiator, then the frequency of transposer steps is different than for the main arpeggiator. DUR lets the transposer modify the note duration. Even if not applying a pitch transposition, the transposers can selectively change the duration of notes from the main input, chord generator input stages, and chord generator output stages.