SCM met = tempo_req_l_->get_mus_property ("metronome-count");
Duration *d = unsmob_duration (tempo_req_l_->get_mus_property ("duration"));
SCM met = tempo_req_l_->get_mus_property ("metronome-count");
Duration *d = unsmob_duration (tempo_req_l_->get_mus_property ("duration"));