Each sequencer channel has its own step filter (also called a beat filter). In normal operation, the step filter stops notes from being played when triggers are received from the trigger section. When so configured, the step filter can instead control which notes are passed through the note filter.

Step Filter Panel
Step Filter Panel

The following descriptions assume the step filter is not linked to the note filter, and is filtering output notes directly. See the note filter section for information on linking the step and note filters.

The step fitler provides an easy way to add or change rhythms in a pattern sequence. The rhythms can skip through the patterns, or put pauses in note patterns.

When steps are turned off in the step filter, the sequencer skips a pattern step, or delays the pattern step until a future beat

  • In CLOCK, LAYER, and FUGUE modes, the trigger section divides the triggers down, and the step filter determines what the trigger does after the tempo division.
  • In STEP modes, the step filter is applied directly to the incoming trigger.

So for example, you could duplicate a channel with step filter disabled onto another sequencer slot, then turn set the step filter on in the second slot. The step filter could then pass only one note, every third or fourth note. That could provide a bass accompaniment, by turning the pitch transposition down in the second channel, and/or trigger a percussive sound in a rhythmic pattern.

STEP FILTER ON

Enables the step filter. When the step filter is turned off, all the panel controls except the ON button are hidden from view.

LEN

Sets the number of steps before the pattern repeats. For continually shifting patterns, LEN can be different from the pattern length, so that the melodic pattern shifts on each loop.

STEP GRID

The pattern grid shows 16 steps in four rows and four columns. When any step is OFF, the trigger event is filtered.

When enabled, the step filter also displays the current step with a green highlight ring. As a performance aid, all steps can be enabled, and the green highlight ring then indicates the current pattern position.

PRE (StepFlt)

Sets whether the triggers are filtered before or after the pattern sequencer. Step filtering can create very different sounds depending on where the filter is plugged, with the PRE control.

  • Pre-Filtering occurs when PRE is on. In this case, when a step is off, the pattern step does not advance when a trigger is received. The pattern step is instead delayed until the next trigger event that passes through the step filter successfully.
  • Post-Filtering occurs when PRE is off. In this case, when a step is off, the beat filter does not generate an output event, but still advances the pattern step.

Note that a step also does not create an output note. If the velocity is zero for that step (either as set in the pattern sequencer, bar sequencer, or as a result of a velocity modulation from the modulation matrix), the pattern advances without outputting a note. However, when the pattern advances, the note pitch, velocity and duration values are still sent to the modulation matrix. When the step filter removes a step, the values are not sent to the modulation matrix.

But perhaps more importantly, the step filter provides an easy way to turn pattern steps on and off without changing the pattern tables. As a result, the step filter lets you slice up steps from a good pattern in different ways, in real time. By setting the step filter to a different length than the note filter, and switching the step filter between PRE and POST, the note pattern can also change on each pattern cycle.

In combination with multiple beat filters and zero-velocity steps in the pattern, sophisticated rhythmic textures are possible. For example, the step filter in one channel can create a basic pattern, then trigger another channel which also has a step filter enabled. overall, thre are a number of different ways to modify which pattern steps result in audible notes: with the step filter, with pattern velocity, with bar velocity, and with velocoty modulation. These all provide simple ways to create interesting rhythmic changes both in composition and real-time performance.

SET0, SET1

These are momentary triggers to set all of the matrix values off or on.

These options are provided as a compositional or real-time performance aid.

Version Notes

  • v098 added SET0 and SET1.
  • v099 added step filtering of permutations. See the note filter for more information.