Wanted to share my learnings since this post - I've much improved on the above (which was in fact broken / not working as it should).
I've uploaded a sketch template on Open Processing here that I'm using as a base at the moment, it's not much to look at but because a lot of examples I found were overly complex for my noob self, I stripped this down to the bare essentials using simple blocks, lines & points.
It's quite heavily commented and I hope it can be helpful to some. I'm sure it can be refined and optimised a lot more.
I struggled to find a working sketch that shows how to accurately isolate specific frequencies within a spectrum when using MINIM to analyse audio for responsive visuals.
I've uploaded a sketch template on Open Processing here that I'm using as a base at the moment, it's not much to look at but because a lot of examples I found were overly complex for my noob self, I stripped this down to the bare essentials using simple blocks, lines & points.
It's quite heavily commented and I hope it can be helpful to some. I'm sure it can be refined and optimised a lot more.
It seems as though the audio isn't working in the browser so best to download, I've included the audio track in the source.
I shared some work using this method here.