9

Table Of Contents
Mix buttons: Turn on to modulate the mix between the primary and sub-oscillators.
Cutoff buttons: Turn on to modulate the cutoff frequency of the filter.
Resonance buttons: Turn on to modulate the resonance of the filter.
Volume buttons: Turn on to modulate the main volume.
Filter FM button (modulation envelope only): Turn on to use the triangle wave of the
oscillator to modulate the filter cutoff frequency. This modulation can result in a
pseudo-distortion of the sound, or it can create metallic, FM-style sounds. The latter
occurs when the only signal you can hear is the self-oscillation of the resonating filter
(see Driving the ES1 Filter to Self-Oscillation).
LFO Amp (modulation envelope only): Turn on to modulate the overall amount of LFO
modulation.
Using the ES1 LFO
The LFO (low frequency oscillator) generates an adjustable, cyclic waveform that can be
used to modulate other ES1 parameters (as discussed in Using the ES1 Router).
Wave knob: Sets the LFO waveform. You can choose from triangle, ascending and
descending sawtooth, square wave, sample & hold (random), and a lagged, smoothly
changing random wave. Each of these waveforms cycles in its own way, providing
different types of modulation. You can also assign a side chain signal as a modulation
source (EXT). Choose the side chain source channel strip from the Side Chain menu at
the top of the plug-in window.
Rate slider and field: Defines the speed—the frequency—of the LFO waveform cycles.
If you set values to the left of zero, the LFO phase is locked to the tempo of the host
application—with phase lengths adjustable between 1/96 bar and 32 bars. If you
select values to the right of zero, the LFO phase runs freely.
When set to zero, the LFO outputs at a constant and full level, which allows you to
manually control the LFO speed with your keyboard’s modulation wheel. This could
be useful, for example, if you wanted to change the pulse width by moving your
keyboard’s modulation wheel. The pulse width would be chosen as the LFO
modulation target (left router column), and the modulation intensity range would
be determined by the Int via Whl setting.
42 Chapter 4 ES1