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Varispeed – Definition
Varispeed is an audio recording and playback technique that changes both the speed and the pitch of recorded sound at the same time. It has been used for decades as both a creative effect and a production tool.
What is Varispeed?
Originally, varispeed was achieved by changing the speed of analog tape machines. Increasing the playback speed made recordings sound faster and higher in pitch, while slowing the tape produced a lower pitch and a slower tempo.
Today, many digital audio workstations (DAWs) still include a varispeed function for creative recording, editing, and performance. Unlike modern time-stretching algorithms, varispeed always changes tempo and pitch together.
Why is Varispeed useful for keyboard players and producers?
Keyboard players and producers can use varispeed to create unique piano textures, vintage tape effects, and creative performance ideas. Recording at one speed and playing back at another can produce sounds that would be difficult or impossible to perform naturally.
Varispeed remains a popular technique in genres ranging from classic rock to lo-fi, indie, and experimental electronic music.