We would specify a precise frequency here another one up here but what that gentleman was singing was all the stuff in between.

我们指定一个特定的频率,标记在这里,另一个频率标记在这里,但刚才那位先生唱的,都在音符之间游走

耶鲁公开课 - 聆听音乐课程节选

So, here's Luciano Pavarotti singing a leading tone.

卢西亚诺·帕瓦罗蒂演唱的导音

耶鲁公开课 - 聆听音乐课程节选