Apple MainStage 3 Instruments - MainStage 3 Instruments

ES2 Filter 1 modes
Filter 1 can operate in several modes, allowing specific frequency bands to be filtered (cut away)
or emphasized.
Click one of the following filter mode buttons for Filter 1:
••
Lo (lowpass): Allows frequencies that fall below the cutoff frequency to pass. The slope of
Filter 1 is fixed at 12 dB/octave.
••
Hi (highpass): Allows frequencies above the cutoff frequency to pass. The slope of Filter 1 is
fixed at 12 dB/octave.
••
Peak: Filter 1 works as a peak filter. This allows the level in a frequency band to be increased.
The center of the frequency band is determined by the Cutoff parameter. The width of the
band is controlled by the Resonance parameter.
••
BR (band reject): The frequency band directly surrounding the cutoff frequency is rejected, but
frequencies outside this band can pass. The Resonance parameter controls the width of the
rejected frequency band.
••
BP (bandpass): The frequency band directly surrounding the cutoff frequency is allowed
to pass. All other frequencies are cut. The Resonance parameter controls the width of the
frequency band. The bandpass filter is a two-pole filter with a slope of 6 dB/octave on each
side of the band’s center frequency.
ES2 Filter 2 slopes
Most filters do not completely suppress the portion of the signal that falls outside the frequency
range defined by the Cutoff parameter. The slope, or curve, chosen for Filter 2 expresses the
amount of rejection below the cutoff frequency in decibels per octave.
Slope buttons: Click any button to choose a Filter 2 slope: 12 dB, 18 dB, and 24 dB. The steeper the
slope, the more severe the effect on signal levels below the cutoff frequency.
Fat button: Click the Fat button for 24 dB per octave of rejection. Fat mode has a built-in
compensation circuit that retains the sound’s bottom end. By comparison, the standard 24 dB
setting tends to make lower end sounds less rich.
Chapter 3 ES2 53