Apple Logic Express 8 - Manual (Page 220)

220 Chapter 10 Working With Instruments and Effects
Setting the Channel Pan or Balance and Playback Level
You use the Pan control and Level fader to set a channel’s pan position and playback
level.
To set the pan position (for mono input format channels) or balance (for stereo
format channels), do one of the following:
m Click-hold on the center of the Pan control, and drag vertically.
 Drag upwards to move the pan or balance towards the right channel.
 Drag downwards to move the pan or balance towards the left channel.
m Option-click on the center of the Pan control to reset it to the center position.
To set the playback level, do one of the following:
m Vertically click-drag the Level fader handle.
m Option-click on the handle to reset it to the center (0.0 dB) position.
How Mono and Stereo Effects are Handled
You can insert mono and stereo instances of effects into channel strips.
Only versions of the plug-in that match the channel strip input format can be inserted
(mono to mono or mono to stereo plug-in versions in mono input format channels, for
example).
To insert plug-ins that do not match the channel format:
m Option-click a channel Insert slot.
The Plug-in menu will display all formats the plug-in has to offer, rather than being
limited to the matching format. Any down or up mixing that may be necessary
happens automatically.
Inserting, Moving, and Removing Plug-ins
Plug-ins are, broadly speaking, broken down into two categories:
 Software instruments, which respond to MIDI note messages
 Audio effects, which do not respond to MIDI note messages
The Audio Units format also offers two further plug-in types:
 Generators
 MIDI controlled effects
As the name suggests, Generator Audio Unit plug-ins generate audio signals. In
contrast to software instruments, however, they do not require a MIDI note message to
be triggered.
Audio Unit MIDI controlled effects can be controlled via MIDI, unlike standard audio
effect plug-ins. As such, they are used differently.