2014-03-14 10:48 GMT+02:00 Vesa <[email protected]>:
> So, I think this would be a nice option to provide.
>
> Currently AFP works by simple scaling of pitch by resampling the sample
> buffer. This is probably sufficient for most purposes.
>
> But what if we provided an additional, optional feature: scale pitch
> with librubberband, which can scale pitch without changing the
> length/tempo of the sample?
>
> It could be implemented with a simple checkbox in AFP which switches
> between modes. Librubberband is GPLv2 and additionally it's provided by
> most distros, so we could just use it as a dependency, no need to add
> more 3rd party code to the source tree.
>
Good idea, but Rubber Band is a very complex piece of software. Running an
instance for each voice uses lots of CPU; the results could be cached, but
that would use lots of memory too.
Another option could be to adapt the code of AM pitchshifter which is
adequate in many cases, and a lot lighter.
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