10.6

Table Of Contents
232Logic Pro Instruments
In Logic Pro, drag one of the three chain symbols in the ES2 filter section.
The chain between Cut and Res of Filter1 controls both the resonance (drag
horizontally) and cutoff frequency (drag vertically) simultaneously.
The chain between Cut and Res of Filter2 controls both the resonance (drag
horizontally) and cutoff frequency (drag vertically) simultaneously.
The chain between Filter1 Cut and Filter2 Cut controls the cutoff frequency of
Filter1 (drag vertically) and Filter2 (drag horizontally) simultaneously.
Force Logic Pro ES2 filters to self-oscillate
If you increase the filter Resonance parameter to higher values, the filter begins to
internally feed back and, as a consequence, begins to self-oscillate. This results in a sine
oscillation—a sine wave—that is audible.
To start this type of oscillation, the filter requires a trigger. In an analog synthesizer, this
trigger can be the noise floor or the oscillator output. In the digital domain of the ES2,
noise is all but eliminated. Therefore, when the oscillators are muted there is no input
signal routed to the filter. Turn on Filter Reset to provide a trigger signal that can be used
to drive the filter to self-oscillate.
Use Filter Reset to drive the ES2 filters to self-oscillate
In Logic Pro, click the Filter Reset button to turn on.
When this button is engaged, each note starts with a trigger that makes the filter
resonate/self-oscillate immediately.
Compensate for high resonance values with the ES2 Fat(ness) parameter
In Logic Pro, click to turn on the Fat(ness) button—below the other filter slope buttons.
An increase of the resonance value results in a rejection of bass—low frequency
energy—when using lowpass filters. Use the Fatness button to compensate for this side
effect and to obtain a richer sound.