Audio::Analyzer seems to be most to it's use although it would require lots of reprogramming before getting there because it is PCM based only. Converting to PCM would also loose a lot of the quality of it's original intend, which would make me prefer more towards Audio::FindChunks using RMS which could be use to visualize to waveforms, I'll see if it could fit the purpose soon after testing a bit with it...

Audio::File and Audio::DSP "could" be used but they would require a lot of programming work before getting to the result.
These two taste raw and bloody; although not like I like my steak which also needs to be bloody as hell :p