Electronic Music Wiki
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A periodic or cyclic signal whose cycles mark the passage of time. (A clock signal may, but does not necessarily, give the time of day.) In electronics, a traditional clock signal is usually a square wave or pulse wave. Some particular part of the signal, often the "rising edge" (when the signal goes from its low extreme to its high extreme) is designated as the "reference" point; the occurrence of this part of the signal marks an increment of time. In electronic music, clock signals are most commonly used to coordinate musical events which the performer desires to be synchronized in time. These might include:

Besides a plain square wave, two types of clock signal that are often used in electronic music are DIN sync and MIDI Clock.

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