Thanks!  That does exactly what I need.   Jeremy Salwen <jeremysalwen@gmail.com> wrote: > > Aubio offers a simple program to do exactly that.  See http://aubio.org/aubiopitch.html. > > On Sun, May 15, 2011 at 10:59 PM, Ivan K <ivan_521521@yahoo.com> wrote: > > > >       Is there a simple app that can, given a sound file that contains only > >       one pitch at a time, return the frequencies of the pitches?