separating audio frequencies

I’ve begun learning pure data as I’d gathered it was probably better to do it outside of Touch and then import the data in as seperate channels but I came accross Part 3/9 | Derivative Presentation MUTEK 2009 on vimeo and it looks like it’s being done in Touch very successfully. How did you do go about it? I’ve not had much success so far, the parametric EQ really slows down my PC.