10.6

Table Of Contents
355Logic Pro Instruments
The middle switch position lets you use the LFO or Filter Envelope to modulate the
FM (Amount) and Harmonic content at the same time.
The right switch position lets you use the LFO or Filter Envelope to modulate the
Harmonic content.
Harmonic/Inharmonic sliders: Precisely change the levels of these sonic elements, and
therefore, the tonal color of your sound. Technically, you are changing the tuning ratio
between the carrier and modulator oscillators, resulting in harmonic or inharmonic
content becoming more or less audible. This parameter is also available as the Wave
Variation (FM Harmonic) real-time modulation target. See global and controller settings.
Note: The tuning ratio can change significantly when you adjust the (Wave) Shape
slider, so avoid using it if making a subtle alteration to the harmonic or inharmonic
content of your sound.
Shape slider: Modulate the carrier waveform. This control and the FM slider interact as
you adjust either, resulting in a range of tones with more or less harmonic/inharmonic
content.
Mix slider: Crossfade (set the level relationships) between the modulator and carrier
oscillators.
Logic Pro Retro Synth filter controls
Retro Synth features a flexible filter that can operate as a lowpass, highpass, bandpass,
band reject, or peak filter. The filter can subtly, or dramatically, affect the basic tone sent
from the oscillators.
Filter use is straightforward. Choose one of the available filter types and adjust the filter
cutoff and resonance controls to sculpt the sound. You can also control the filter cutoff
and resonance controls while playing—either manually or by using keyboard position, an
envelope, or the LFO to modulate these filter controls automatically. Real-time changes
to filter cutoff and resonance can make your performance much more dynamic and
interesting. You can do this with MIDI keyboard controllers and with modulation section
controls. See modulation and global and controller settings.