It would be really valuable to be able to manually change the band width of the spread count bands supplied by the FFT node. For instance, instead of a spread count of 8 resulting in equal eighths along the spectrum from 0 to 22k, I could use a multiplier to change how the bands scale into one another.
If You make a FFT (Dshow9 4Channels), it is a module, so if you right click on that, you can see how the 4 bands where selected, so you can do something equal to get 8 bands. The trick is the values that go to the I (spreads).
Also have a look at the FFT examples in the Next Generation girlpower folder in the vvvv45beta30.2 download, there are a lot of explanations regarding the topic.