Re: [LAU] Slowing down audio while keeping same pitch ?

From: Shani Pribadi <shanipribadi@email-addr-hidden>
Date: Wed Jul 30 2014 - 05:18:41 EEST

On Tue, Jul 29, 2014 at 08:47:13PM -0400, jonetsu@email-addr-hidden wrote:
> Is it possible to slow down an audio file (mp3 for instance) while
> keeping the same pitch ? Does it even make sense ? The software would
> have to insert more of the same audio 'bits' to make it last longer.
> Is it possible ?
>
> Cheers.
> _______________________________________________

You can use WSOLA based time-scaling (Soundtouch) [1] or Phase Vocoder
(Rubberband) [2] to do that. If you only need to play slowed down audio
mplayer/mpv has 'scaletempo' parameter (from reading the manual it seems to be
WSOLA-based). Gstreamer also has a soundtouch plugin in gst-plugins-bad.

[1] http://www.surina.net/soundtouch
[2] http://www.breakfastquay.com/rubberband
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Received on Wed Jul 30 08:15:02 2014

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