Musical acoustics requires many notions in mechanics, acoustics, physics, signal processing, etc. Unfortunately, in the context of teaching in a Master of Science, the number of hours devoted to this kind of teaching is extremely limited and requires the development of appropriate teaching methods. In this presentation, we will present the approach we have implemented as part of the ATIAM Master's degree (Acoustics, Signal Processing and Computer Science applied to Music) by defining pedagogical objectives, developing pedagogical modalities and establishing evaluation sequences. In particular, in this teaching, we mix both Problem-Based Learning and Project-Based Learning with more traditional courses such as lectures and practical works. The idea is to encourage students to be autonomous in their learning (and therefore to encourage acquisitions for which the student has gaps) and to motivate them to carry out these acquisitions by proposing appropriate problem situations. Thus, we will present the global structure of the module built around the modelisation of musical instruments. It includes problem situations implemented to achieve the learning objectives around percussion, string and wind instruments, and a project dealing with radiation, sound recording and room acoustics. The students' results, since the implementation of this course, show a greater knowledge and much better acquisitions, quantified by self-evaluation of the students and their exam results.