8 - Preset Edit

Clock Modulation

Clock Modulation

The Sequencer/Arpeggiator clock can also be used as a modulation source. It can be used to trigger the Filter or Auxiliary envelope generators, trigger Sample Start, synchronize the LFOs, or used directly as a square wave modulation source. Envelopes are triggered on the positive going edge of the clock. LFOs are triggered on the negative going edge.

The Clock source is available in six divisions (double whole note, whole note, half note, quarter note, eighth note, sixteenth note). The different rates can be used separately or in conjunction to create complex “synchro-sonic” rhythm patterns.

Using MIDI clocks, Sequencer/Arpeggiator clock can also be synchronized with an external MIDI device such as a drum machine or sequencer.

Clocks are routed exactly like the other modulations sources using the Cords. The Cord Amount MUST be positive (+) for the clock to pass. By modulating the Cord Amount, the divided clocks can be routed around using realtime controllers or other modulation sources.

Syncing an LFO to the Clock

When an LFO is triggered by a clock, the LFO wave resets to zero every time the clock wave goes low. To sync an LFO to the clock, patch a clock divisor to the LFO Trigger (Trg) in the Cords screen.

If the LFO rate is close to the clock rate, the LFO will synchronize with the clock. If the two rates are far apart, the waveform of the LFO will be mildly or radically altered (as shown below).

Triggered LFO

LFO Wave

Clock

LFO Trigger causes the LFO to reset each time the clock waveform goes low.

The possibilities of clock modulation and retrigger are numerous and varied. A repeating six segment curve of any shape can be created by triggering the Filter or Auxiliary Envelope generators with the clock.

260 E-MU Systems

8 - Preset Edit

Clock Modulation

A few other possibilities are listed below.

•Turn different voice layers on and off using different clock divisors.

•Create a global triangle LFO by routing the Clock through a Lag Processor.

•Switch between Auxiliary and Filter Envelope retriggering using a slider, footswitch or the Thumby button.

•Retrigger LFOs or Envelopes using noise or other LFOs to create random or semi random effects.

•Modulating the rate of triggered LFOs will alter the LFO waveform.

•Route multiple clocks with different divisors to the same destination (such as pitch) to create complex patterns. (Hint: Adjust the Cord Amounts.)

Eighth

Note

Quarter

Note

16th Note

8th Note

Quarter

Note

Added together in

equal amounts produces…

EOS 4.0 Software Manual 261