This exploratory study describes the design and implementation of a sound-based intervention in the initial training of specialist music teachers at a Spanish university. It aimed to create spaces geared towards more creative and contemporary approaches to musical learning in order to gauge the perceptions of trainee teachers regarding this kind of approach. The intervention (45 h of class time) was based on the creation of electroacoustic compositions following the SBM (Sound Based Music) approach using digital tools (Aglaya Play, AP). Qualitative process data were collected through self-reports, individual memories, and nine focus groups. The results suggest that the implementation of new intervention models that take into account the development of future teachers' creativity with activities focused on exploration, experimentation, and creation with sound can generate new opportunities to enrich their teaching identities.