ToneTester tests your ears for differences in how they hear pitches ("binaural diplacusis" or "interaural pitch difference"). You adjust a slider until your ears hear the same pitch, and then ToneTester tells you the actual pitch difference.
ToneTester Ear Testing Application Copyright (C) 2007 Daniel Griscom, Suitable Systems
This program 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.
This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
For more information about ToneTester, see
1 Centre Street, Suite 204
Wakefield, MA 01880