One of the more common techniques associated to microsound
  is granular synthesis, 

 book >>  "microsound" by curtis road

 pd tutorial >> http://www.pd-tutorial.com by Johannes Kreidler   3.7 granular synthesis

PD granulators:  particlechamber by Derek  Holzer   http://puredata.info/community/patches

                    pulsegrain by nullpointer  http://www.nullpointer.co.uk/-/pd.htm

                        nm-grainer by Nick Mariete

http://puredata.info/Members/nmariette/granular-implementations

                   granulator by ch   in the externat lib nusmuk included at pd-extended

You can also check out disis_munger~ which is an updated/enhanced version of munger~ from the PeRcolate library and which apparently never worked quite right on PD/Linux.

HTH

Ico