The alleged use of special operations troops in the raid could signal a shift away from the controversial U.S.tactic of relying on long-range missile assaults to take out terrorist targets.

VOA: standard.2009.09.15

So range or position here in the accompaniment can oftentimes signal this information to us.

因此伴奏的音域或者音高,常常告诉我们这个信息

耶鲁公开课 - 聆听音乐课程节选