Shift the audio pitch by a factor of two:

Shift the audio pitch by a semitone:

A shift by n octaves corresponds to a frequency ratio of 2ⁿ:

A shift by s semitones corresponds to a frequency ratio of 2^s/12:

AudioPitchShift can be used to change the pitch of a harmonically complex sound without altering its timbre and timing:

The frequency ratio between the components of the audio signal is not changed:

Process the audio track of a video:

Shift the pitch of an audio object to match a target frequency:

Extract the mean frequency with AudioLocalMeasurements:

Shift the audio to reach the target frequency:

AudioPitchShift and AudioFrequencyShift modify the spectrum of the signal in different ways:

AudioPitchShift shifts each frequency f in the signal by an amount proportional to the frequency itself (f^'=f×shift), thus preserving the timbre in the shifted signal:

AudioFrequencyShift shifts every frequency f by the same amount (f^'=f+shift), changing dramatically the timbre in the shifted signal:

Change the pitch of a recording by using a different sample rate:

AudioPitchShift changes the pitch without altering the timing:

The quality of the result degrades with large shift parameters:

Using Method->"Speech" for non-speech signals may not sound as expected: