9

Table Of Contents
Output parameters: The bottom section houses the Output section, which features the
Sub Osc Level and Stereo Detune knobs, that can be used to thicken the sound. The
volume envelope, Main Level, and Velocity controls are used to set the EFM1 level. See
Setting EFM1 Output Parameters.
Randomize parameters: The Randomize field and button are shown to the lower right.
They are used to create random variations of the current settings, resulting in new
sounds. See Creating EFM1 Random Sound Variations.
Extended parameters: Accessed by clicking the disclosure triangle at the lower left of
the interface, these parameters allow you to assign MIDI controllers to the FM Depth
and Vibrato parameters. See Assigning EFM1 MIDI Controllers.
Working with the EFM1 Modulator and Carrier Parameters
In FM synthesis, the basic sound is generated by setting different tuning ratios between
the Modulator and Carrier oscillators, and by altering the FM intensity. The tuning ratio
determines the basic overtone structure, and FM intensity controls the level of these
overtones.
In the EFM1, this ratio 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, discussed below.
Modulator parameters Carrier parameters
FM Intensity knob
Harmonic knobs: Set the tuning ratio between the Modulator (left) and Carrier (right)
oscillators. See Setting the EFM1 Tuning Ratio.
Fine (tune) knobs: Adjust the tuning between two adjacent harmonics (as determined
by the Harmonic knobs). The range of this control is the center (0) position, Fine tune
does not have an effect. Click the “0” to center the Fine tune knob. Dependent on the
amount of detuning, you will hear either:
A subtle “beating of the timbre-if lower detuning amounts are used.
New harmonic and inharmonic overtones-if high detuning amounts are used.
131Chapter 6 EFM1