The following Matlab project contains the source code and Matlab examples used for pitch determination algorithm. Pitch determination and voice quality analysis using subharmonic-to-harmonic ratio. There are also some post-processing routines available, such as de-step filter, median filter, and linear filter. For more information, please see http://www.speakingx.com/blog/2008/01/02/pitch-determination
The source code and files included in this project are listed in the project files section, please make sure whether the listed source code meet your needs there.