Question: How to get the instant sound volume?
Is there a terminal command I can get the instant sound volume?
I will try to describe it clearly.
I can get the current volume setting from `osascript -e "get Volume settings"`.
But that is not what I want.
When I display a song, the volume changes through the song.
I want to get the loudest sound in the song.
How can I get that in terminal command?
MacBook Pro, macOS High Sierra (10.13.3)