7/23/2019 Digital Audio Study Guide
1/2
MUS 107 Nicole WoodDigital Audio study guide
TERMS:Be prepared to understand the general definitions of these
terms, as well as what they imply fordigital audio. For example,
will a lower or higher bit rate yield a higher-quality audio
file?
Sampling - the process of converting sound into a digital
file
Sample rate - measured in Hz, is a factor in audio quality
Bit rate - measured in bits, is a factor in audio quality
Compression - reducing file size
Lossy compression - removes data from the file to reduce file
size
Lossless - does not remove data from file
Stereo (stereophonic) - 2 waves of sound
Mono (monaural) - 1 wave of sound
AUDIO FILE FORMATS
CONVERSION
Draw a line from the compression type on the left to the
appropriate compression types on the right,so that each line
represents a conversion that would result in NO loss of
quality.
File Extension Compressed? Lossy/Lossless File Size (S/M/L)
Advanced Audio Coding .aac compressed lossy S
Apple Lossless .m4a compressed lossless M
Audio Interchange File Format .aiff uncompressed lossless L
Free Lossless Audio
Compression.flac compressed lossless M
MPEG-2 Layer III .mp3 compressed lossy S
Wave .wav uncompressed lossless L
