| Author |
Message |
jeffdod
Guest
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 Posted:
Sun Dec 04, 2005 5:15 pm Post subject:
Speed Change without Pitch Change |
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Does anyone know of a C/C++ library for taking an audio file and
performing a speed change without changing the pitch?
Thanks,
Jeff Dodson |
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Vladimir Vassilevsky
Guest
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| Posted:
Sun Dec 04, 2005 5:15 pm Post subject:
Re: Speed Change without Pitch Change |
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| Quote: | Does anyone know of a C/C++ library for taking an audio file and
performing a speed change without changing the pitch?
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Jeff,
The simple way to do it is just to repeat or cut out the small chunks of
data depending if you are going faster or slower respectively. Divide
your file into the frames of ~10ms long and operate frame by frame.
A better way for doing the speed change is the same method however the
signal is split into frq. subbands and each subband is processed separately.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com |
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Dan Mills
Guest
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| Posted:
Sun Dec 04, 2005 5:15 pm Post subject:
Re: Speed Change without Pitch Change |
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jeffdod wrote:
| Quote: | Does anyone know of a C/C++ library for taking an audio file and
performing a speed change without changing the pitch?
Thanks,
Jeff Dodson
|
libsoundtouch (C++) springs to mind as one option, but there are others.
Regards, Dan. |
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Jerry Avins
Guest
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| Posted:
Mon Dec 05, 2005 12:13 am Post subject:
Re: Speed Change without Pitch Change |
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jeffdod wrote:
| Quote: | Does anyone know of a C/C++ library for taking an audio file and
performing a speed change without changing the pitch?
Thanks,
Jeff Dodson
|
Look on http://www.dspdimension.com/
Jerry
--
Engineering is the art of making what you want from things you can get.
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