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GLOSSARY APPENDIX B
Attenuation
A decrease in the level of an audio signal.
Audio Compression Manager (ACM)
The Audio Compression Manager from Microsoft® is a standard interface for audio compression and signal
processing for Windows. The ACM can be used by Microsoft® Windows® programs to compress and
decompress WAV files.
AVI
A file format of digital video. Vegas software allows you to open, edit and create new AVI files.
Bandwidth
Refers to the EQ plug-in that is built in. Each frequency band has a width associated with it that determines
the range of frequencies that are affected by the EQ. An EQ band with a wide bandwidth affects a wider
range of frequencies than one with a narrow bandwidth.
Bandwidth can also refers to the amount of data that can be transferred via a connection, such as a network
or modem. For example, streaming media must be compressed due to the limited bandwidth of most Internet
connections.
Beats Per Measure
In music theory, the time signature of a piece of music contains two pieces of information: the number of
beats in each measure of music, and which note value gets one beat. This notion is used to determine the
number of ticks to put on the ruler above the track view, and to determine the spacing when the ruler
displays in measures and beats format.
Beats Per Minute (BPM)
In music theory, the tempo of a piece of music can be written as a number of beats in one minute. If the
tempo is 60 BPM, a single beat occurs once every second. Lower BPM’s equal slower tempo, and vice versa.
Bit
A bit is the most elementary unit in digital systems. Its value can only be 1 or 0, corresponding to a voltage
in an electronic circuit. Bits are used to represent values in the binary numbering system. As an example, the
8-bit binary number 10011010 represents the unsigned value of 154 in the decimal system. In digital
sampling (specifically the PCM format), a binary number is used to store individual sound levels, called
samples.
Bit Depth
The number of bits used to represent a single sample. Vegas software uses either 8, 16, or 24-bit samples.
Higher values increase the quality of the playback and any recordings that you make. While 8-bit samples
take up less memory (and hard disk space), they are inherently noisier than 16 or 24-bit samples.
Bus
A virtual pathway where signals from tracks and effects are mixed. A bus’s output can be a physical audio
device in the computer from which the signal is heard.
Byte
Refers to a set of 8 bits. An 8-bit sample requires one byte of memory to store, while a 16-bit sample takes
two bytes of memory to store.