[PD] real time time-stretching ?

[oliver]

hi list,

"Gradually slow down a recorded sound without altering its pitch or timbre". 
(steve reich, "slow motion sound", 1968)

I'm looking for a not too CPU-expensive way of gradually time-stretching a sound  
in real-time without hearing too many "windows".

i didn't find much about this subject in the mailing list database, and will 
check out the few results, but maybe in the meanwhile someone has gotten further 
in this matter already ?...

it should be something like in 7.stuff\soundfile-tools\3.phase.vocoder.pd. but 
this patch is a little unhandy and can not produce the sound in its original 
length without artefacts...

oliver