"Duxbury, Davies and Sandler
<http://scholar.google.co.uk/scholar?q=author:Duxbury+intitle:Improved+time-scaling+musical+audio>
/Improved time-scaling of musical audio using phase locking at
transients/, 2002
Resetting phases at transients. The analysis method here is far more
complex than that in Rubber Band."
(
http://www.breakfastquay.com/rubberband/technical.html)
So rubberband has an analysis too ;).
http://www.breakfastquay.com/rubberband/documentation.html