[PD] in-memory sample players?

[sven]

what's the best ext to play in-memory samples?
it should work on linux and windows.
i can't use arrays because it stores samples as 32bit floats so it takes up 
too much memory.
it should be possible to play samples at arbitrary speed - setting speed or 
doing it a la tabread4~ would be ok.
and is there a good timestretching/pitchshifting ext/abstraction?
all solutions for pd i've found so far work with fixed windowsize.
is there one w/ adaptive windowsize?
ciao,
sven.