10.6

Table Of Contents
474Logic Pro Instruments
Logic Pro Sculpture filter parameters
The parameters discussed in this section apply on a per-voice basis. A number of
parameters can be morphed between as many as five morph points. These are indicated in
the parameter descriptions. For more information, see Sculpture morph overview.
The filter parameters provide further timbral/spectral control over your sound. They will be
familiar to you if you have any experience with synthesizers. If you’re new to the concepts
behind synthesizer filters, see Filters overview.
Filter parameters
Filter On/Off button: Turn the filter section on or off.
Filter type buttons: Click to choose the filter mode.
HiPass: Allow frequencies above the cutoff frequency to pass. Because frequencies
below the cutoff frequency are suppressed, it’s also known as a low cut filter. The
slope of the filter is 12dB/octave.
LoPass: Allow frequencies that fall below the cutoff frequency to pass. Because
frequencies above the cutoff frequency are suppressed, it’s also known as a high cut
filter. The slope of the filter is 12dB/octave.
Peak: Choose to specify the center of a frequency band with Cutoff. Control
bandwidth and gain with Resonance. Frequencies outside the band remain at their
current level. Peak filters are generally used to enhance a frequency range.
BandPass: Allow the frequency band surrounding the center frequency to pass.
Resonance controls the width of this band. All other frequencies are cut. The
bandpass filter is a two-pole filter with a slope of 6dB/octave on each side of the
band.
Notch: Cut the frequency band surrounding the center frequency. Resonance
controls the width of this band. All other frequencies are allowed to pass. Notch
filters are generally used to suppress noise or a particular frequency.
Cutoff knob: Set the cutoff or center frequency, depending on the chosen filter type. In
a lowpass filter, all frequency portions above the cutoff frequency are suppressed, or
cut off, hence the name. The cutoff frequency controls the brilliance of the signal. The
higher the cutoff frequency is set, the higher the frequencies of signals that are allowed
to pass through the lowpass filter. This parameter can be morphed.
Resonance knob: Set the filter resonance value. This parameter can be morphed.
In highpass and lowpass modes, Resonance emphasizes the portions of the signal
that surround the center frequency.
In Peak, Bandpass, and Notch modes, Resonance controls the width of the band that
surrounds the center frequency.