Average Impulse Response help

I am building a patch for my father - who is a violin maker - where we can load violin impulse responses into a buffer, to filter a signal.

thats the easy part. now, what we want to do is : we want to be able to visualize the average spectrum of the impulse response, on a multislider or function object - to be able to edit the resulting filter (pull down peaks, or boost dips etc...) like in the famous forbidden planet patch.

any tips would be greatly appreciated!