10.6

Table Of Contents
92Logic Pro Instruments
Logic Pro Alchemy master voice section
Master voice section controls are shown only in advanced view. Click the Advanced button
to switch to advanced view, then click the Global button.
An individual voice generated in the source section is passed through the main filters,
then into the master voice section where controls are provided for the amplitude, pan, and
coarse and fine-tuning of the voice. The voice is then mixed with other voices at the input
of the effects section.
The master voice section also provides high-level control over various attributes of a
preset such as polyphony, tuning, and glide.
Master voice controls
Vol knob: Adjust the level of the voice. By default, AHDSR 1 modulates this parameter.
Note: When an AHDSR envelope is assigned to modulate master volume, the modulation
depth cannot be adjusted. This is because setting the depth below its default of 100%
would cause notes to remain above zero amplitude indefinitely, resulting in hung notes.
This rule applies to other modulators, such as an MSEG, where you also require a mod
depth setting of 100% unless you actually want notes to sustain indefinitely.
Pan knob: Adjust the stereo position of the voice. Acts as a pan control for mono sounds
and as a balance control for stereo sounds.
Coarse/Fine Tune knobs: Adjust the pitch of the voice in semitones (Coarse) and cents
(Fine=1/100th of a semitone).
All/A/B/C/D buttons: Select All to set global voice parameters, which override individual
source settings. Select A/B/C/D to set individual source voice parameters. All of the
following parameters can be set globally or per source.
Trigger Mode pop-up menu: Determine how trigger events affect audio signals and
glides (portamento). This parameter interacts with the Num and Glide controls and can
be used globally or per source.
Note: A trigger signal causes certain processes to execute from the beginning. These
include: the playback of samples and modulators, including LFO, AHDSR, MSEG, and
Sequencer. Individual modulators also have their own trigger options.