Instruments and Effects

642 Glossary
normalize This function applies the current Parameter box settings to the selected
MIDI events (by altering the actual events themselves), and clears existing parameter
settings. When it comes to audio, a different Normalize function raises the volume of a
recorded audio file to the maximum digital level, without altering the dynamic content.
notch filter This filter type cuts the frequency band directly surrounding the cutoff
frequency, allowing all other frequencies to pass.
note number Pitch of a MIDI note, controlled by the first data byte of a MIDI note
event.
OpenTL Abbreviation for Open Track List. This file format, typically used for data
exchange with Tascam hard disk recorders, such as the MX 2424, can be imported and
exported by Logic Pro. The OpenTL file format only supports the exchange of audio
data (audio regions, inclusive of track position information). MIDI and automation data
are ignored when using the Logic Pro OpenTL export function.
option Alternative function, often in the form of a checkbox, sometimes also available
as a menu entry.
Option Modifier key, also known as the Alt key in MS Windows.
oscillator A synthesizer oscillator generates an alternating current, using a selection of
waveforms which contain different amounts of harmonics.
output channel strip Channel strip type in the Mixer that controls the output level and
pan/balance for each physical output of your audio interface.
pan, pan position The placement of mono audio signals in the stereo field, by setting
different levels on both sides (see Balance).
peak meter 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.
peak 1) The highest level in an audio signal. 2) Portions of a digital audio signal that
exceed 0 dB, resulting in clipping.
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.