System information
Q
Quadraphonic
A mixing implementation that allows for four discrete audio channels. These are usually routed to two front
speakers and two back speakers to create immersive audio mixes.
Quantization
The process by which measurements are rounded to discrete values. Specifically with respect to audio,
quantization is a function of the analog to digital conversion process. The continuous variation of the
voltages of a analog audio signal are quantized to discrete amplitude values represented by digital, binary
numbers. The number of bits available to describe these values determines the resolution or accuracy of
quantization. For example, if you have 8-bit analog to digital converters, the varying analog voltage must
be quantized to 1 of 256 discrete values; a 16-bit converter has 65,536 values.
Quantization Noise
A result of describing an analog signal in discrete digital terms (see "Quantization" on page 645). This noise
is most easily heard in low resolution digital sounds that have low bit depths and is similar to a "shhhhh"
type sound while the audio is playing. It becomes more apparent when the signal is at low levels, such as
when doing a fade out.
R
Region
A subsection of a sound file. You can define any number of regions in a project or media file.
Resample
The act of recalculating samples in a sound file at a different rate than the file was originally recorded. If a
sample is resampled at a lower rate, sample points are removed from the sound file decreasing its size, but
also decreasing its available frequency range. When resampling to a higher sample rate, extra sample
points in the sound file are interpolated. This increases the size of the sound file but does not increase the
quality. When down-sampling one must be aware of aliasing. See"Aliasing" on page 631.Vegas Pro will
automatically resample all audio that is added to the project's sample rate.
Ruler Tags
Small tab-shaped controls above the time ruler that represent the location of markers, regions, and loop
points in the waveform display.
GLOSSARY645