Bringing together a group of musicians and a conductor for a musical rehearsal requires advance planning and an important budget in order to cover travel and subsidiary costs. We have developed an ATM based telepresence environment allowing small groups of musicians that are located in different sites to rehearse as if they were present in the same room and have organized a first distributed musical rehearsal trial. The trial allowed us to test and evaluate the system, according to a methodology we developed and to draw first conclusions regarding its performance and usability.