从Apple的网站上找到了答案，是因为音频设备的录音延时没有设为零。
转载原文的解释如下：
The refresh overviews is in the audio file menu of the file editor (not track editor).
I think your problem is one of the first not fixed by resetting the Record Delay to zero, you sure the record level is hot enough, what if you enlarge the tracks a bit.
截图备着，供大家不时之需。:)
转载原文的解释如下：
The refresh overviews is in the audio file menu of the file editor (not track editor).
I think your problem is one of the first not fixed by resetting the Record Delay to zero, you sure the record level is hot enough, what if you enlarge the tracks a bit.
截图备着，供大家不时之需。:)