james@astro.uucp (James McCartney) (07/26/90)
The 'big' point you may be missing is that the input wave may have sine components at several frequencies. If we are just dealing with sine waves there is no difference really, you would just use a different 'factor'. If the input wave has components at 100, 200 and 300 hz, and we pitch shift with a factor of 1.1 then the output wave will have components at 110, 220, and 330 hz -- still in a 1:2:3 relationship. however if we freq. shift by 10 hz the out put wave will have components 110, 210, and 310 hz the waves are now in a 11:21:31 relationship which is fairly inharmonic. So in other words pitch shifting maintains the harmonic relations of the components whereas freq. shifting changes the relationships. --- james mccartney