[plug] Audio Speed Control

William Kenworthy billk at iinet.net.au
Wed Oct 24 15:16:47 WST 2001


search freshmeat for "ecasound" - excellent for modifying audio and
applying effects, either live or as part of a post/pre processing filter
chain.

BillK

On Wed, 2001-10-24 at 14:37, Brad Campbell wrote:
> G'day all
> 
> I have implemented real-time pitch shifting in mpg123, but the algorithm
> being used (I am using an already existing algorithm in the code) makes
> for a really rough nasty harsh sound. 
> It simply duplicates or drops samples as required.
> I have tried writing some linear interpolation into it to smooth it out
> a bit, but it really does not help much.
> 
> Has anyone done any work in this area? Or can you recommend an existing 
> OSS project that you use, that has a reasonable pitch shift built in that
> sounds Ok..
> 
> I have tried a couple of xmms plugins, but one sounds rough and the other
> is not reliable enough to give me a decent listening test.
> 
> The pitch shift in alsa player was not much good last I tried it either.
> 
> -- 
> Brad....
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> 




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