Logic Pro 9 User Manual - Help Library - Apple

Voice Separation tool You can separate polyphonic voices onto different staffs in the
Score Editor by drawing a dividing line with the Voice Separation tool (provided you are
using a polyphonic staff style).
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 Pro, all recorded and bounced WAV files are in Broadcast Wave format, which
includes high-resolution timestamp information that stores positional information. This
makes it easy to align these files in other audio and video applications.
waveform A visual representation of an audio signal. Waveform graphics run from left
to right, and are centered on a horizontal line. Louder portions of the waveform (amplitude
peaks) are indicated as taller spikes or higher curves in the waveform.
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.
window type Status of the window as a float window or a normal window. Float windows
always float in the foreground and cannot be hidden by normal windows. Also see float
window.
Word Clock Clock signal required by digital audio interfaces to ensure the sampling rates
of connected devices run synchronously. When two devices are connected via a standard
digital audio interface (such as S/P-DIF or ADAT optical), Word Clock is transmitted via
the audio circuit. If you want more than two digital audio devices to communicate with
each other, you will need to use separate Word Clock ports for synchronization, in most
cases.
word length See bit depth.
XG Extended General MIDI standard from Yamaha, compatible with Roland GS.
zero crossing A point in an audio file where the waveform crosses the zero amplitude
axis. If you cut an audio file at a zero crossing there will be no click at the cut point.
Glossary
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