Libpt is copyright (C) 1999 by Maurizio Umberto Puxeddu.
Libpt is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
Libpt is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Libpt pitchtracking code derives from the ptps utility by Oyvind Hammer downloadable from NoTAM server in its original version for Silicon Graphics machines and from the MusTec server as Linux port by Dave Phillips.