EFM1 global parameters in Logic Pro for iPad

The global parameters are used to set the tuning, number of voices, and other aspects of the overall sound.

Global parameters

Tune knob and field: Fine-tune the pitch in cents. One cent is 1/100th of a semitone.
Transpose pop-up menu: Choose the base pitch. You can transpose by semitones or octaves.
Glide knob and field: Introduce a continuous pitch bend between two consecutively played notes. Adjust the value to set the time required for the pitch to travel from the last played note to the next.
Note: Glide can be used in both of the monophonic modes—Mono and Legato—or in any of the polyphonic settings—where Voices is set from 2 to 16.
Voices pop-up menu: Choose the number of simultaneously playable voices. Choose from: legato (one voice), mono (one voice), or any number from 2 to 16 voices.
- In Mono mode, staccato playing retriggers the envelope generators every time a new note is played. If you play in a legato style (play a new key while holding another), the envelope generators are triggered only for the first note you play legato, then they continue their curve until you release the last legato played key.
- Legato mode is also monophonic, but with one difference: the envelope generators are retriggered only if you play staccato—releasing each key before playing a new key. If you play in a legato style, envelopes are not retriggered.
Note: On several monophonic synthesizers, the behavior in Legato mode is referred to as single trigger, while Mono mode is referred to as multi trigger.
Unison button: Layer two complete voices, thus making the sound richer. EFM1 can be played with up to eight-voice polyphony when in unison mode.
PB Range slider: Set a pitch bend range from 0 to 24 semitones.
Velo Sens slider and field: 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 VeloSens control all the way to the left—counterclockwise—if you don’t want EFM1 to respond to velocity.
Randomize knob and field: Determine the amount of randomization—variance from the original sound.
Randomize Trigger button: Create a new sound by randomizing multiple parameters.

Create a random sound

The Randomize feature generates new sounds by randomly altering a number of key parameter values.

This feature is ideal for creating subtle variations of a particular sound or for creating totally new sounds. It is useful when getting started with FM synthesis.

In Logic Pro EFM1, tap the Randomize Trigger button.
You can tap multiple times. Save your settings as you go if you generate a sound you want to keep.

Limit the amount of randomization

In Logic Pro EFM1, rotate the Randomize knob to set the amount of randomization—variance from the original sound.
If you want to only randomly “tweak” the current sound, use values below 10%. Use higher values to radically change the sound with each tap on the Randomize Trigger button.

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Logic Pro User Guide for iPad

EFM1 global parameters in Logic Pro for iPad

Global parameters

Create a random sound

Limit the amount of randomization