Re: Need to hire a software developer for a voice processing app!
Re: Need to hire a software developer for a voice processing app!
- Subject: Re: Need to hire a software developer for a voice processing app!
- From: Richard Dobson <email@hidden>
- Date: Sat, 20 Feb 2010 12:24:04 +0000
On 20/02/2010 11:07, Paul Sanders wrote:
If you can't use Audio Units, there is some 'wide open license'
pitch-shifting source code here:
http://www.dspdimension.com/download/
There's also a link to an article which explains how it works.
Yes, it is a very good reference. Note however that being a demo it is
not optimised for speed; it would need to be considerably modified (e.g.
to use "in-place" computation) to run comfortably in real time on
lower-performance hardware. The iPhone (though no slouch) is a timely
reminder of the need to employ all those robust optimisation techniques
that modern multi-GHz machines have allowed us to forget!
As I noted earlier, all the dsp specified can be found in Csound, which
therefore offers an immediate (and free!) laboratory for designing and
testing things, with some efficient streaming phase vocoder tools for
pitch shifting, tracking, etc - the pvs framework, implemented by me :-).
Richard Dobson
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