Subject: Re: pitch From: Christopher Brown <c-b@xxxxxxxx> Date: Thu, 11 Aug 2011 17:47:27 -0700 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Hi Brittany, I don't know about Garage Band, but Audacity uses an algorithm called soundtouch, which is an implementation of the synchronous-overlap-add method. Here is a link to the library used, and there is a link on this page to a nice discussion by the author of how it works: http://www.surina.net/soundtouch/ -Chris On 8/11/2011 11:11 AM, Brittany Guidone wrote: > Dear List, > > Does anyone know what happens in Garage Band or Audacity when you change the pitch of a voice in > those programs? The voices are not getting faster or slower when I change them 4 semi tones. But I > want to know what is being done to the voices when I change the pitch. > > -Brittany Guidone -- Christopher Brown, Ph.D. Associate Research Professor Department of Speech and Hearing Science Arizona State University http://pal.asu.edu