7

Glossary 711
Transposition track Global track component that shows the transposition of the root
note of chords in the chord track.
UDL button Short for Up One Display Level button. In many Logic windows you find a
button featuring a square graphic in the top left corner. Clicking this button takes you
to the next highest display level. As an example, if you are looking at the events in a
MIDI Regions inside a folder, clicking the UDL button will switch the display to a view of
the MIDI Region in the parent folder.
Undo function Function which reverses the previous editing operation.
velocity Force at which a MIDI note is struck; controlled by the second data byte of a
note event.
Velocity tool This Toolbox tool, found in Logic’s MIDI editors, allows the velocity
adjustment of individual or grouped note events.
Video track A component of the Global tracks that allows the viewing of video clips.
virtual memory Area of the hard disk used as an extension of RAM memory by the
computer. The disadvantage is its very slow access time, in comparison to physical
RAM.
VITC Short for Vertical Interval Time Code—synchronization signal for video interfacing
incorporated into the video signal. In contrast to LTC, the synchronization signal can
also be read in a static image. Also see LTC.
VU meter Abbreviation for Volume Unit meter. An analog meter used to monitor audio
levels.
WAV, WAVE The primary audio file format used by Windows-compatible computers. In
Logic, all recorded and bounced WAV files are in Broadcast Wave format, which include
a high-resolution timestamp.
waveform A visual representation of an audio signal.
wet/dry mix Refers to the ratio of a signal that effects have been added to (wet), and
the original, unprocessed signal (dry).
white noise Noise type that consists of all frequencies (an infinite number) sounding
simultaneously, at the same intensity, in a given frequency band. Its name is analogous
to white light, which consists of a mixture of all optical wavelengths (all rainbow
colors). Sonically, white noise falls between the sound of the consonant F and breaking
waves (surf). Synthesis of wind and seashore noises, or electronic snare drum sounds,
requires the use of white noise.