Looking to see if there is a frequency analyzer already written for pd, much like the FreqScope for Supercollider, or if I need to create my own...

Thanks for the patch tcihan! Definitely a great starting point for me...

Thanks for the reply hardoff. The sonograph~ is close but I need real-time. Don't really need the history part of a sonograph, so something with just amplitude and frequency axes would suffice (although a real-time sonograph would work just fine too). Here's a screenshot of FreqScope:

http://www.uweb.ucsb.edu/~ljputnam/gfx/freqscope1.tiff

I was also looking at just using jack into a freeware app (like AudioXplorer) that does real-time spectral analysis but it seemed to be a resource hog and a little bit of overkill... By the way I'm on a mac... Thanks again!!