10.6

392Logic Pro Instruments
Sampler modulation sources
The table outlines sources you can choose in the Source pop-up menus of the Mod Matrix
pane that can be used for real-time modulation of targets. Also see Sampler modulation
targets and Sampler modulation via sources.
Source Comments
--- or None Disables the source.
Side Chain Side Chain modulation uses the side-chain signal level as a modulation
signal. The side-chain source is chosen from the Side Chain pop-up menu
in the plug-in window header. It is fed to the internal envelope follower,
which creates a modulation value based on the current side-chain input
signal level.
Maximum Max sets the value of this source to +1 (an internal value that indicates the
maximum possible amount for this source). This offers interesting options
for controlling the modulation intensity with all possible via values.
Random A random value generator is used as a source.
Note: The random value updates each time a MIDI note-on
message is received.
LFO 1 - 4 The LFOyou choose is used as a source.
Envelope 1 - 5 The Envelope Generator you choose is used as a source.
Key This source outputs keyboard position (MIDI note number). The default
center point is C3. A value of −100 indicates five octaves below C3. A
value of +100 indicates five octaves above. Modulate the Cutoff target
with the Key source to control the cutoff frequencies of the filter with
the keyboard position—as you play up and down the keyboard, the cutoff
frequencies change. A modulation Amount value of zero proportionately
scales cutoff frequencies with keyboard note pitches.
Velocity Velocity serves as a modulation source.
Release Velocity The modulation occurs when you release a key (this requires a keyboard
that sends release velocity information).
Pitch Bend The pitch bend wheel is used as a modulation source.
Aftertouch Aftertouch (also known as keyboard pressure) serves as a modulation
source. Sampler reacts to mono and poly aftertouch.
Note: If you set the target to Cutoff, the cutoff frequencies
rise and fall, depending on how firmly you press a key
on your touch-sensitive MIDI keyboard—after the initial
keystrike.
Mod Wheel Your keyboard Modulation Wheel controller is used as a modulation
source.
MIDI Controllers 2–119 The MIDI controller you choose serves as a modulation source.
Logic Pro uses controllers 7 and 10 for volume and pan control of channel
strips. Controller 11 is marked Expression. It has a fixed connection to this
function, but it can also be used to control other modulation sources.