Apple Logic Pro 9 - Manual (Page 1328)

pan, pan position The placement of mono audio signals in the stereo field, by setting
different levels on both sides (see Balance).
Pan control Rotary knob (directly above the Level fader) on mono channel strips, that
determines the position of the signal in the stereo image.
Parameter box Field on the left side of Logic Pro windows (or in the Inspector). It is used
to adjust the parameters of the selected track, regions, events, or objects. Also see
Inspector.
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.
peak level display A digital audio meter that displays the absolute volume of an audio
signal as it plays. So named because every peak in the signal can be accurately seen.
Pencil tool Tool used to create empty MIDI regions in the Arrange area. It can also be
used to add audio regions to the Arrange area, 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
area.
pink noise A harmonic noise type that contains more energy in the lower-frequency
range.
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 that indicates the current playback position
in all horizontal, time-based Logic Pro windows (the Arrange area, 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.
1328 Glossary