System information
Normalize
Refers to raising the volume so that the highest level sample in the file reaches a user defined level. Use this
function to make sure you are fully utilizing the dynamic range available to you.
Nyquist Frequency
The Nyquist Frequency (or Nyquist Rate) is one half of the sample rate and represents the highest frequency
that can be recorded using the sample rate without aliasing. For example, the Nyquist Frequency of 44,100
Hz is 22,050 Hz. Any frequencies higher than 22,050 Hz will produce aliasing distortion in the sample if no
anti-aliasing filter is used while recording.
P
Pan
To place a mono or stereo sound source perceptually between two or more speakers.
Peak Data File
The file created by Vegas Pro when a file is opened for the first time. This file stores the information
regarding the graphic display of the waveform so that opening a file is almost instantaneous in direct edit
mode. This file is stored in the directory that the file resides in and has a .sfk extension. If this file is not in
the same directory as the file, or is deleted, it will be recalculated the next time you open the file in direct
mode.
Pixel Aspect
The pixel aspect determines whether the pixels are square (1.0) which refers to computers, or rectangular
(settings other than 1.000) which typically refers to televisions. The pixel aspect ratio, together with the
frame size, determine the frame aspect ratio.
Plug-In
An effect that can be added to the product to enhance the feature set. Vegas Pro supports all DirectX plug-
ins. The built in EQ, Compression and Dithering effects are also considered plug-ins because they work in
other DirectX-compatible applications.
Plug-In Chain
Plug-ins can stringed together into a chain so that the output of one effect feeds into the input of another.
This allows for complex effects that could not otherwise be created.
Pre-roll/Post-roll
Pre-roll is the amount of time elapsed before an event occurs. Post-roll is the amount of time after the
event. The time selection defines the pre- and post-roll when recording into a selected event.
GLOSSARY643