TF_MUTE
if ((blank != 0) && !(tm->tm_flags & TF_MUTE))
tm->tm_flags |= TF_MUTE;
tm->tm_flags &= ~TF_MUTE;
if (!(tm->tm_flags & TF_MUTE)) {
if (!(tm->tm_flags & TF_MUTE))
if (!(tm->tm_flags & TF_MUTE)) {