10.6

Table Of Contents
285Logic Pro Instruments
Logic Pro EFM1 modulation parameters
FMsynthesis is, at its core, caused by the intensity and type of modulations that take place
in the signal path. The modulators outlined in this section have a different impact and role
to play than equivalent envelopes and LFOs found in analog synthesizer designs.
Modulation parameters
Modulation Envelope sliders: Control both the FM(Intensity) and Modulator pitch
parameters over time. The envelope is triggered every time a MIDI note is received.
Attack slider: Set the time it takes to reach the maximum envelope level.
Decay slider: Set the time it takes to reach the sustain level.
Sustain slider: Set a level that is held until the MIDI note is released.
Release slider: Set the time it takes to reach a level of 0, after the MIDI note has
been released.
Modulator Pitch knob: Determine the impact of the modulation envelope on the pitch of
the modulator oscillator.
If you turn the knob clockwise, you increase the effect of the modulation envelope.
If you turn the knob counterclockwise, you invert the effect of the modulation
envelope, as follows:the envelope slopes down during the attack phase and slopes
up during the decay and release time phases.
If you click the “0” to center the Modulator Pitch knob, the envelope has no effect on
the pitch of the modulator oscillator.
FMDepth knob: Determine the impact of the modulation envelope on FMintensity.
If you turn the knob clockwise, you increase the effect of the modulation envelope.
If you turn the knob counterclockwise, you invert the effect of the modulation
envelope, as follows:the envelope slopes down during the attack phase and slopes
up during the decay and release time phases.