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How can I change the pitch (frequency) of audio data without changing the duration?

April 26, 2017audio changing Data duration Frequency pitch

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How can I change the pitch (frequency) of audio data without changing the duration?

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This is a quite complex problem called “pitch shifting”. It requires advanced DSP algorithms. This is not available as part of the Java Sound API and is unlikely to ever become so. However, it is possible to do this in Java. One example is in Craig Lindley’s book (see Q: 1).