More info / register for a trial here: https://www.signumaudio.com/bute-loudness-analyser

Overview:

I require I piece of hardware I don't know the name of.
I want it to be able to take a measurement of the sound pressure level over a broad frequency. And display it in a graph, also handy to be able to send data to and from a laptop.
I want to use this device in this manner.

I am new to logic (logic express) and am looking for an eq analyser to help find sonic gaps in my mixes.

Anybody have any suggestions for plugins?