I am looking for some insight on a school project that uses PD to analyze music in Real Time.

I am looking for Frequency level and Possibly Decbel level. I am not currently sure if this is even possible to do with PD but I would also like to have the data that PD gets from the RT analyzation to be put into a text file.

My overall project is to get lights to sync with music.
e.g.(When a bass note is hit I would want a certain light to turn on for a set amount of time.)

I am currently using an Arduino Mega circuit board and I have C/C++ code that can turn lights on and off. I still need to make code that can read and search through a text file (The PD data text file). And while I have knowledge of C/C++ code I am a newbie at PD. I have a small understanding of the features but nothing really technical.