polybuffer~, A new buffer implementation from Cycling '74 that deals with multiple simultaneous audio files, ideal for samplers etc.

http://www.cycling74.com/forums/topic.php?id=26356

Compare to CNMATs existing solution called multibuf (an abstraction approach):

http://cnmat.berkeley.edu/patch/2813

IRCAM MuBu: a multi-channel buffer contain for arbitrary time-tagged data, supports many formats including audio, segmentation markers, MIDI, etc (beta, to be released later this year)

http://imtr.ircam.fr/imtr/MuBu