The notion of delay pertains to the use of a device (or digital equivalent therefore) allowing for the introduction of one or more precisely timed delays to a given input signal. This can be used for a variety of effects including, for example, the creation of the sensation of spatial depth.
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INA-GRM, (2000). La musique électroacoustique
Julien, Olivier (1999). Le magnétophone à bande analogique ou le premier multieffet

