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Glossary of Digital Audio Terms
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Index
13
Glossary of Digital Audio Terms
Bass
Bass is the particular low-range area of the sound spectrum where low musical notes and sounds are
located. Increasing the bass value will make the low vocals and drums more prominent in your music.
Adjusting this level too high can cause distortion at high volumes in some music files.
Bitrate
Bitrate denotes the number of bits per second used
to represent a digital music file. The size and
quality of a compressed digital audio file is
determined by the bitrate used when encoding the
file. The higher the bitrate used, the higher the
sound quality, and the larger the file size. For
example, with MP3, a bitrate of 128kbps (128,000
bits per second) is generally thought of as "CD
quality", and takes up about 1 megabyte (MB) per
minute of music. At a 64kbps bitrate, the sound
quality is similar to that of an FM radio signal, but
you can get approximately two minutes of music in
that same 1MB of storage space. CD audio has a
bitrate of 1.4Mbits per second (1,400,000 bits/second).
Codec
Depending on the context and kind of technology involved, codec can be defined as a compressed digital
audio file format (like MP3, WMA, and so on), a "coding/decoding" chip used to translate between digital
and analog transmissions (used in modems), or a compression/decompression algorithm. Codecs compress
audio data into a file, often for efficient transmission over a network, and then decode it for playback. While
all the codecs perform similar compression of digital audio, there are differences in the technology.
The RioVolt supports the following digital audio codecs:
• MP3
• WMA
• CD Audio
(Red
Book)
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