VocProc is a LV2 plugin for pitch shifting (with or without formant correction), vocoding, automatic pitch correction and harmonizing of singing voice.
VocProc is released under GPLv2 licence.
2010/02/18, I've decided to abandon development of standalone version and maintain only LV2 version of VocProc, starting from verion 0.2
2010/02/03, Ubuntu Karmic packages available at https://launchpad.net/~philip5/+archive/extra/+sourcepub/950775/+listing-archive-extra. Info about adding this repository can be found here (thanks to Jeremy and Philip).
VocProc source can be downloaded from http://hyperglitch.com/files/vocproc/vocproc-0.2.tar.gz
Standalone version (not maintained anymore): http://hyperglitch.com/files/vocproc/VocProc-0.12.2.tar.gz
To build it you need to have installed gtkmm-2.4, lv2-c++-tools and fftw3. These packages are also available in most distro's repositories (note to Debian/Ubuntu users: you need to get dev packages. AFAIK lv2-c++-tools is not in standard repositories so you'll have to compile it yourself. It requires libboost-dev for building).
(edit the Makefile if needed) > make > make install
> make uninstall
Note: It is possible to build VocProc with or without vocoder functionality. This is described in README and Makefile files.