« Discipline »: The term « discipline » has a double meaning: a) as rule and corporal inscription (as described by Michel Foucault in Discipline and Punish: The Birth of the Prison); and b) as field of knowledge. The second meaning cannot exist without the first: a subject matter depends on rules, techniques and procedures that constitute its bounds. Both meanings have also in common the relation to the teaching/learning process and to related issues of power. Finally, discipline is both what enables and what prevents a practice. For us, the question, then, is not about suppressing boundaries between different disciplines, or on the contrary of defining more and more separate fields of knowledge. Rather, a discipline should be considered as a complex entity that cannot be split into subdivisions, which remain stranger to each other (for example divisions in the music world separating composers, musicologists, performers, teachers, etc.). On the other hand, we have to accept that a discipline, as a complex entity, might be disturbed by practices that are foreign to it.