+1 from me as well.
As a thought for (possibly...

) low hanging fruit implementation - could it be a possibility to have the spectrum analyser write a small image file (specs/res based on user pref), have that then added as an 'artwork' image (not sure if that would allow wide / non-square aspect ratios, or if there are limitations when icon/disc is used, or if there is a way to create custom slots... I do barely use Artwork for Cover only...

), which in turn could be shown through the 'artwork' option (if field can be specified...).
Just a thought.
c.