I want a similar feature but mainly for generating timing marks in LOR. Vixen has a VU plugin and I've thought of using a couple of filtered audio files to process and create the different spectrum "marks".
might give the vixen plugin then import to lsp idea a go. For now I don't need it to reflect the audio directly. Have had a play with the audio spectrum sheild for the arduino using 2801 strips but won't have enough time to do anything with it this year.
Maybe with the new nutcracker and the german software you could do this and them import into LSP. I've always liked the beat sticks, and if you have enough items across the house with pixels, would be a neat effect with a guitar rift or so in a rock and roll christmas mix.