10.6

Table Of Contents
287Logic Pro Instruments
Logic Pro EFM1 output parameters
EFM1 provides the following level controls.
Output parameters
Sub Osc Level knob: Introduce a sub-oscillator signal that enhances bass response.
EFM1 features a sine wave sub-oscillator. This operates one octave below the
FMengine, as determined by the Transpose parameter. Increase the Sub Osc Level
control to mix the sub-oscillator sine wave with the FMengine output.
Stereo Detune knob: Add a chorus-like effect to the sound. This is achieved by doubling
the EFM1 voice with a secondary, detuned FMengine. High values result in a wide
stereo effect being added to the detuning, thus increasing the perceived space and
width of your sound.
Note: It is possible that mono compatibility could be lost with use of this parameter.
Volume Envelope: Shapes the level of the sound over time. The volume envelope is
triggered every time a MIDI note is received.
Attack slider: Set the time it takes to reach the maximum volume 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 required to reach a level of zero, after the MIDI note has
been released.
Main Level knob: Set the overall output level.
Velocity knob: Determine the sensitivity to incoming MIDI velocity messages. EFM1
dynamically reacts to MIDI velocity—harder playing results in a brighter and louder
sound. Set the Velocity control all the way to the left—counterclockwise—if you don’t
want EFM1 to respond to velocity.