The history of broad music level meter deployment in a nutshell:

VU Meters
LEDs
Graphic Spectrum Analyzers
Geiss

poof

Nothing.

Posted on Twitter over 13 years ago and archived here at /twitter/2013/06/07/tweet-343057787393282048/ in the Twitter and Facebook collections.
Proximate posts in the Twitter collection
newer Twitter post from June 8, 2013, 343434279642099712 08 June 2013
this post Twitter post from June 7, 2013, 343057787393282048 07 June 2013
older Twitter post from June 7, 2013, 343037030164467712 07 June 2013
Proximate posts in the General collection
newer Philip Daigle, as a rabbit, blackberry floating at his feet. Previously. 08 June 2013
this post Twitter post from June 7, 2013, 343057787393282048 07 June 2013
older Twitter post from June 7, 2013, 343037030164467712 07 June 2013