What Is Variable Speed Processing?

- Jul 16, 2018-

Variable speed processing also known as audio time compression and expansion processing, it is a process of changing the tape playback speed without changing the sound pitch, and is often used in professional situations. It is possible to appropriately extend or shorten the playing time of various recorded programs, without changing the tone and pitch of the original sound, and providing an important means for real-time synchronous playback of the program. The method of changing the number of revolutions of the motor is used to adjust the playback speed and change the playback time. However, since the change of the running speed of the tape will inevitably make the pitch of the sound become higher or lower, the signal processing circuit is provided in the shift processing system, which will change due to the speed. The resulting pitch change is restored.

 

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