Apple Logic Pro 8 - Manual (Page 991)

Glossary 991
peak 1) The highest level in an audio signal. 2) Portions of a digital audio signal that
exceed 0 dB, resulting in clipping. You can use the Logic Pro level meter facilities to
locate peaks and remove or avoid clipping. The Search Peak command in the Sample
Editor Functions menu searches for the sample bit with the greatest amplitude value.
Pencil tool Tool used to create empty MIDI regions in the Arrange. It can also be used
to add audio regions to the Arrange, when used in conjunction with the Shift key. In
the Sample Editor, the Pencil can be used to draw out transient signal spikes (pops and
clicks) in signals.
Piano Roll Editor A MIDI event editor that displays note events as horizontal beams.
Events can be cut, copied, moved, and resized in a similar fashion to regions in the
Arrange.
pitch The perceived highness (treble) or lowness (bass) of a musical sound.
Corresponds to the frequency of the sound wave.
pitch bend message MIDI message transmitted by the pitch bend wheel of a MIDI
keyboard.
playback Playing an audio or MIDI region, an audio file, or an entire arrangement,
allowing you to hear it.
playhead The playhead is a vertical white line which indicates the current playback
position in all horizontal, time-based Logic Pro windows (the Arrange, for example). The
playhead can be directly grabbed and moved with the mouse (see scrubbing).
plug-in Software application that enhances the functionality of the main program (in
this case, Logic Pro). Logic Pro plug-ins are typically software instruments or effects.
plug-in window A window that opens when a plug-in is inserted, or the Insert/
Instrument slot is double-clicked. Allows you to interact with the plug-in parameters.
Pointer tool Tool used to select or edit regions, events, menu or interface items, and
more in Logic Pro.
post fader Sends in analog mixers are positioned either before (pre) or after (post) the
fader. Post fader means positioned after the volume fader in the signal flow, with the
level of a signal going to the send changing along with the fader movements.
pre fader Sends in analog mixers are positioned either before (pre) or after (post) the
fader. Pre fader means positioned before the volume fader in the signal flow, so the
level of a signal routed pre-fader to a send remains constant, regardless of any fader
movements.
Preferences window A window that is accessed via the Logic Pro > Preferences menu.
All Logic Pro preferences can be set in this window.