matlab pitch/stretch

[John Hershey <jhershey@xxxxxxxxxxxxxxx>]

Hi all,

I find my self suddenly in need of high quality Matlab code to pitch shift
arbitrary sounds for use as experimental stimuli, while preserving the
temporal dynamics.  I could equivalently use time-stretch code and resample
back to the original time scale to get a pitch shift.  I am aware that there
are several techniques for doing this - phase-vocoder, granular resynthesis,
other signal models... Who has some matlab code for their favorite
technique?

Thanks,
John