In electronic music
, it is the act of modulating
the level of an audio filter
(like the cutoff filter
, for example) across a signal
in a constant fashion. This has the effect of changing the 'feel
' of the sound
in a fluid, almost subconscious
, manner adding more dynamic
to the music. The filter sweep is damn near the heart and soul of electronic dance music
, and can be very musically effective when done correctly. This technique
is popular since in many cases a sweep can be applied real time
, thereby adding "live" control over dynamics
A filter can be slowly applied to build tension toward a climax, or can be modulated back and forth to add reckless intensity.
The specific effect of a filter sweep is dependent on the type of filter used.