A sequencer that offers flexible, precise control over the individual steps and the overall sequence.
DHE Modules includes three Sequencizer modules:
- Sequencizer 4 (shown).
- Sequencizer 8.
- Sequencizer 16.
The three modules operate identically, except for the number of steps.
- Sequencizer User Guide for ideas about how to use the Sequencizer modules.
- Factory Presets for descriptions of the presets included with the modules.
- J and S Curves
RUN specifies whether the sequencer is running.
If RUN falls while a sequence is in progress, the sequencer pauses the sequence. If RUN rises while a sequence is paused, the sequencer resumes the sequence.
LOOP: If LOOP is on when a sequence ends, the sequencer immediately begins a new sequence.
If LOOP is off when a sequence ends, the sequencer becomes idle.
START and LENGTH select the steps of the sequence.
Bracket-shaped markers next to the PROGRESS lights indicate the currently selected steps.
GATE controls when a sequence starts, and may influence when the sequence advances.
If GATE rises while the sequencer is idle, the sequencer starts the sequence, activating the first selected, enabled step.
See the step advancement controls for details of how an individual step may react to GATE conditions.
RESET: When RESET rises, the sequencer abandons any paused or in-progress sequence, and either starts a new sequence or becomes idle, depending on RUN.
The advancement controls determine when the sequencer advances from this step to the next:
TRIG determines when the step generates an internal trigger. The INT and SUST settings (below) determine how the step reacts to these internal triggers.
RISE: Triggers when the GATE rises.
FALL: Triggers when the GATE falls.
EDGE: Triggers when the GATE rises or falls.
HIGH: Triggers when the GATE is high.
LOW: Triggers when the GATE is low.
INT determines whether triggers interrupt the step while it is generating a curve.
OFF: The step ignores all triggers while it is generating a curve.
ON: Triggers interrupt the curve. If a trigger occurs while the step is generating a curve, the sequence advances to the next step.
SUST determines whether the step sustains when it completes its curve.
OFF: The step does not sustain. When the step completes its curve, the sequence automatically advances to the next step.
ON: When the step completes its curve, it sustains until a trigger occurs. While a step sustains, it emits the voltage reported by its END anchor.
The step generates a curve that interpolates between the voltages reported by the START and END anchors. Each anchor has three controls:
The MODE button (the top button in each section) determines whether the anchor reports a sampled voltage or the current voltage.
SAMPL: The anchor reports the voltage that it sampled from its source when the step started.
TRACK: The anchor reports the current voltage of its source.
The SOURCE button (just above the knob) specifies where the anchor gets the voltage it reports. The possible sources are:
- The anchor’s LEVEL knob.
- The A, B, or C input port.
- The OUT port.
The anchor LEVEL knob sets the voltage of the anchor’s level source. The global LEVEL knob and range switch (below) affect the value of this knob. This knob is used only when LEVEL is selected as the anchor’s SOURCE.
The global LEVEL knob sets a global multiplier (0–1) applied to every anchor’s LEVEL source. This knob is modulated by the control voltage at the CV port.
UNI / BI selects the voltage range for every anchor LEVEL source.
SHAPE selects the shape of the curve (J or S).
CURVE sets the curvature of the curve.
The step DUR knob sets the duration of the step’s curve. The global duration multiplier knob and range switch (below) affect the value of this knob.
The global DUR knob sets a global multiplier (0–2) applied to the duration of each step. This knob is modulated by the control voltage at the CV port.
Note that though the multiplier may be as low as 0, the actual duration is never reduced below the minimum duration of the selected range.
1 / 10 / 100 (the duration range switch) selects the global duration range for every step duration knob. The switch labels indicate the maximum duration (seconds) for each range. For each range:
- The minimum duration is 1/1000 of the maximum: 1ms, 10ms, or 100ms.
- Centering the step duration knob gives a duration of 1/10 of the maximum: 100ms, 1s, or 10s.
PROGRESS lights indicate which step is active (if any), and how far the active step has progressed in generating its curve. The light progresses from red to green over the curve’s duration.
Note that the light indicates progress, not voltage.
- ON enables or disables the step. If a step is disabled, the sequencer bypasses the step when advancing.
- A, B, and C: Three input signals that each START and END anchor can sample or track.
STEP # identifies the current step, represented as 10s/N volts, where
- s is the number of the current step
- N is the module’s largest step number
For example, if all steps of a Sequencer 4 are selected and enabled, and the sequencer is looping, the STEP # port will cycle through the values
2.5V → 5.0V → 7.5V → 10.0V → 2.5V → …
When the sequencer is idle, the STEP# port emits 0V.
CURVE emits 10V if the current step is generating a curve, and 0V otherwise.
SUST emits 10V if the current step is sustaining, and 0V otherwise.
STEP ∆ emits a 10ms pulse when a step completes.
SEQ ∆ emits a 10ms pulse when the sequence starts or loops.
OUT emits the voltage generated by the current step.
Sequencizer 4 includes a suite of envelope generator presets:
- AD: Attack Decay.
- ADBDSR: Attack Decay Break Decay Sustain Release. After the attack, the sequence decays to a “break” voltage, then decays to the sustain voltage.
- ADHR: Attack Decay Hold Release.
- ADSHR: Attack Decay Sustain Hold Release.
- ADSR: Attack Decay Sustain Release.
- AHDSR: Attack Hold Decay Sustain Release.
- AHR: Attack Hold Release.
- ASR: Attack Sustain Release.
- DAR: Delay Attack Release.
- DADSR: Delay Attack Decay Sustain Release.
- DAHR: Delay Attack Hold Release.
- DASR: Delay Attack Sustain Release.
Each Sequencizer module includes these factory presets, which are primarily useful as starting points for your own variations:
- Sample and Hold 100ms: A timed sample-and-hold sequence. Each step holds for 100ms.
- Sample and Hold Gated: A gate-controlled sample-and-hold sequence. Each step holds until the gate rises.
- Steps 100ms: A step sequencer with durations controlled by internal timers. Each step holds for 100ms.
- Steps Gated: A traditional, gate-controlled step sequencer. Each step holds until the gate rises.