if (write (midi_request_pipe[1], &c, 1) != 1) {
error << string_compose(_("cannot send signal to midi thread! (%1)"), strerror (errno)) << endmsg;
if (write (midi_request_pipe[1], &c, 1) != 1) {
error << string_compose(_("cannot send signal to midi thread! (%1)"), strerror (errno)) << endmsg;