// TODO: Check first if type=Voice and if id matches
Stream_event * ev = unsmob_stream_event (sev);
if (ev->get_property ("type") != ly_symbol2scm ("Voice"))
// TODO: Check first if type=Voice and if id matches
Stream_event * ev = unsmob_stream_event (sev);
if (ev->get_property ("type") != ly_symbol2scm ("Voice"))