[linux-audio-user] Resampling loop libraries

[Erik de Castro Lopo]

On 25 Apr 2003 16:39:07 -0400
Mark Knecht <markknecht at attbi.com> wrote:

> Steve and Eric,
>    Thanks for the ideas. Sound Stretch looks quite interesting, but I'm
> not sure if it handles the file format part of the problem. I certainly
> need 24-bit capabilities. The page says 'wave' and '16-bit PCM'. The
> program looks like a good starting point though. (And I'm running
> Mandrake this evening, so I think it might be easier to build. We'll
> see...)

I had a look at that program. The time streching is done in the time 
domain so its only ever going to be any good on certain signals and 
over small stretch/pitch factors. The interpolator is also limited
to linear interpolation.

However, I do not think it would be too hard to drop libsndfile into
the SoundStretch code to do the file I/O and you could probably also
replace the existing linear interpolator with Secret Rabbit Code.

See:

    http://www.zip.com.au/~erikd/libsndfile/
    http://www.mega-nerd.com/SRC/

>    Maybe I need to do something to take advantage of the 'Acidized'
> feature of the loops also? 

That final part I have no answers for (yet).

Erik
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  Erik de Castro Lopo  nospam at mega-nerd.com (Yes it's valid)
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