I was very excited when the FFT plugin was implemented in Rockbox.
Since I record a lot with my iriver h120 I thought it could be a cool recording helper (eg finding a good recording position for loud sources, concerts etc. where headphones are not of much use).
But afaik until now it only works for played back files, not on the inputs.
So I asked the dev if it would be possible to also have it working on input and he said it could be done relatively easy but he doesn't have the time to do it.
http://www.rockbox.org/tracker/task/10065?Unfortunately I don't have a clue about coding and stuff...
Would anyone be up for doing this ?
Other ideas for the FFT plugin:
- adjustable slope
- cumultative (average) display over time
- all sorts of fancy stuff, something like this:

