This paper is about the importance of applying computational modeling
and artificial intelligence techniques to music cognition and computer
music research. The construction of microworlds as a methodology play
s a key role in the different stages of this research. Several uses of
microworlds are described. Microworlds have been criticized in the do
mains of artificial intelligence and the cognitive sciences, but this
critique has to be seen in its proper context (i.e. in modeling of hum
an intelligence, not as a methodology). It is shown that the microworl
d approach is still an important methodology in music cognition and co
mputer music research, and a promising strategy in the design of a gen
eral representation formalism of musical knowledge.