Audio Timescale-pitch Modification

Audio Timescale-pitch Modification

Time stretching is the process of changing the speed or duration of an audio signal without affecting its pitch. Pitch scaling or pitch shifting is the opposite: the process of changing the pitch without affecting the speed. There are also more advanced methods used to change speed, pitch, or both at once, as a function of time.

These processes are used, for instance, to match the pitches and tempos of two pre-recorded clips for mixing when the clips cannot be reperformed or resampled. (A drum track containing no pitched instruments could be moderately resampled for tempo without adverse effects, but a pitched track could not). They are also used to create effects such as increasing the range of an instrument (like pitch shifting a guitar down an octave).

Read more about Audio Timescale-pitch Modification:  Resampling, Phase Vocoder, Sinusoidal/Spectral Modeling, Speed Hearing & Speed Talking, Pitch Scaling

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Audio Timescale-pitch Modification - Pitch Scaling
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