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Chapter 4 EFM1 116
Create random EFM1 sounds
The Randomize feature in the lower-right corner of the interface generates new sounds. It does
this by randomly altering a number of key EFM1 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.
Randomize parameters
•
Randomize button: Creates a new sound by randomizing multiple parameters.
•
Randomize eld: Determines the amount of randomization—variance from the original sound.
Create a random sound
m Click the Randomize button.
You can click multiple times. Save your settings as you go if you generate a sound you want
to keep.
Limit the amount of randomization
m Drag in the numeric eld 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 click.
EFM1 extended parameters
Click the disclosure triangle at the lower left to open the EFM1 extended parameters.
See EFM1 MIDI controller assignments for information about the controller assignment
extended parameters.
Extended parameters
•
MIDI Mono Mode pop-up menu: Choose O, On (with common base channel 1), or On (with
common base channel 16).
In either mode, each voice receives on a dierent MIDI channel. Controllers and MIDI messages
sent on the base channel aect all voices.
•
Mono Mode Pitch Range pop-up menu: Choose 0, 24, or 48.
The chosen pitch bend range aects individual note pitch bend messages received on
all but the common base channel. The default is 48 semitones, which is compatible with
Mobile GarageBand's keyboard in pitch mode. When using a MIDI guitar, 24 semitones is the
preferable setting because most guitar to MIDI converters use this range by default.