A quick search included a link suggesting to someone asking a similar question to look in the Audio modules on CPAN. Looking at some of those in the Audio group, some that looked potentially promising including Audio::Analyzer, Audio::DSP, Audio::File, and Audio::FindChunks. Don't know how many would apply to what you want to do, but hope tat helps a little.

In reply to Re: What about visualizing audio? by atcroft
in thread What about visualizing audio? by freakingwildchild

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