o << "Note #" << n.id() << ": pitch = " << (int) n.note()
<< " @ " << n.time() << " .. " << n.end_time()
<< " velocity " << (int) n.velocity()
o << "Note #" << n.id() << ": pitch = " << (int) n.note()
<< " @ " << n.time() << " .. " << n.end_time()
<< " velocity " << (int) n.velocity()