non realtime frequency plot - how hard is it?

Hi,

I've been trying to make a patch able to export the frequency vs amplitude values (in a form of a table or array or anything similar) from an audio signal. It doesn't have to be real time. In fact, I prefer it non realtime...

Ideally, I would like to trigger the patch for say 10 secs and get the frequency response of the audio for these 10 secs.

Hope it makes sense :)

I'm not bothered about visual representation, although it'll be easy once I've got the values.

Unfortunately, I don't have great joy at the moment. My approach is to use a [cartopol~] after the [fft~] and convert (somehow) the theta into Hz, so as I can export the amplitude and frequency from the [cartopol~].

Not even sure if it's a right approach so any advice is more than welcome :)

thanks
michael