10.6

Table Of Contents
283Logic Pro Instruments
Changes to the ratio of the two oscillators is achieved by adjusting the Harmonic
parameters, found in both the Modulator and Carrier sections. Additional tuning control is
provided by the Fine (tune) parameters.
Modulator parameters
Harmonic knob: Set the tuning ratio between the modulator (left) and carrier (right)
oscillators. See Set the Logic Pro EFM1 tuning ratio.
Fine knob: Adjust the tuning between two adjacent harmonics, as determined by the
Harmonic knobs of both oscillators. The range of this control is ±0.5 harmonic. In the
center (0) position, Fine tune does not have an effect. Click the “0” to center the Fine
tune knob. Depending on the amount of detuning, you will hear one of the following:
A subtle “beating” of the timbre if lower detuning amounts are used.
New harmonic and inharmonic overtones if high detuning amounts are used.
Wave knob: Choose a different waveform for the modulator oscillator. See Choose a
Logic Pro EFM1 modulator waveform.
FM(Intensity) knob: Set the amount of carrier oscillator frequency modulation by
the modulator oscillator. Adjust the FMknob to increase the intensity and number of
overtones, making the sound brighter.
Note: Although the technology behind it is very different, you could compare the
FM(Intensity) parameter with the Filter Cutoff parameter of an analog synthesizer.
Carrier parameters
Harmonic knob: Set the tuning ratio between the modulator and carrier oscillators. See
Set the Logic Pro EFM1 tuning ratio.
Fine knob: Adjust the tuning between two adjacent harmonics, as determined by the
Harmonic knobs of both oscillators. The range of this control is ±0.5 harmonic. In the
center (0) position, Fine tune does not have an effect. Click the “0” to center the Fine
tune knob. Depending on the amount of detuning, you will hear one of the following:
A subtle “beating” of the timbre if lower detuning amounts are used.
New harmonic and inharmonic overtones if high detuning amounts are used.
Fixed Carrier button: Disconnect the carrier frequency from keyboard, pitch bend, and
LFO modulations, resulting in a carrier tone that is free of these modulation sources.