Why is preserving the pitch in audio playback (allegedly) less performant?

Posted by Markus Unterwaditzer on Super User See other posts from Super User or by Markus Unterwaditzer
Published on 2013-06-25T15:44:23Z Indexed on 2013/06/25 16:23 UTC
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audio

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resampling

In VLC for Android, i discovered an option to preserve the pitch during faster-than-normal playback:

enter image description here

The "requires a fast device" obviously implies that faster playback is more performant when the pitch is changed too. Why is that so?

What i've tried: Before posting this question i did some shallow research through Google. According to Wikipedia, there are several methods for faster playback of audio, the "simplest" one (Resampling) changes the pitch.

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