Sound controlled structures

hi

does anyone know what the simplest approach would be to input an audio file into grasshopper and link it to a 3D Dimensional point Grid (populated by an object/instance) located on each point, that reacts to 2 or more different elements of the sound (eg. pitch and tone) by growing or shrinking - the end result would be a cloud or pattern of objects (prisms for e.g.) in different sizes according to the modulation of the input audio, if this makes sense.

any links or directions to look in would be greatly appreciated.

eva