Show/Hide Clip Volume Levels
Shift- -L
Show Audio Waveforms
Shift- -W
Nudge an audio clip horizontally
Click clip, then tap left or right arrow (add Shift to move 10 frames at a time)
Scrub audio
Press Option while dragging Playhead
Extract Audio
-J
Paste Over at Playhead
Shift- -V
Lock Audio Clip at Playhead
-L