Is there any real open-source pitch correction
software for use with Jack?
I use Ardour, and find that I could really benefit from something like
this, for my vocals...
If you are interested in an offline tool to correct your singers, based on
their actual pitches and with respect to a reference frequency grid, I have
developed a Qt4 GUI over Praat that allows exactly this:
http://stephane.magnenat.net/data/fys-0.1.tar.gz
This program is currently alpha and limited, but it would allow you to edit
the pitch of a singer track. You need a working installation of Praat to make
it work.
Maybe it is useful to you. Have a nice day, best regards,
Stéphane
--
http://stephane.magnenat.net