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Representation of data: Sound


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Analogue
A form of signal that can take any value between the lowest and the highest. Sound is like this.
Compression
The process of reducing a file’s size by removing data.
Digital
A form of signal that is either on or off. Computer music files must be digital.
MP3 MPEG-1 or MPEG-2
P3 MPEG-1 or MPEG-2 Audio Layer III – a digital audio encoding format which uses lossy data compression. A common standard for digital music.
Sampling
The process of capturing data about the sound at intervals.
Lossless compression
A way of compressing a file without losing data.
Lossy compression
A way of compressing a file by removing data.