The Eventide H910 Harmonizer, released in 1975, was one of the first commercially available pitch-shifters and digital multi-effects units.
Pitch shifters are included in most audio processors today.Ī harmonizer is a type of pitch shifter that combines the pitch-shifted signal with the original to create a two or more note harmony. Simple pitch shifters raise or lower the pitch by one or two octaves, while more sophisticated devices offer a range of interval alterations. For example, a pitch shifter set to increase the pitch by a fourth will raise each note three diatonic intervals above the notes actually played. For other uses, see Harmonizers (disambiguation).Ī pitch shifter is a sound effects unit that raises or lowers the pitch of an audio signal by a preset interval.
