GK likes to record all of his university class lectures to MP3 files. The problem:

• Dead Air After recording, the files have a lot of superfluous and irrelevant sections, sounds of people handing around papers, obsequeous laughter at prof's bad jokes, etc.
• Annotations GK would like to 'tack on' annotations at random times into the MP3 files.
• Concatenation After recording, some of the MP3 files are very small. GK would like to concatenate the small recordings into a single because his MP3 player has an annoying delay when switching between files.

The Question

In the realm of 'audio munging' (as opposed to text munging), what is the correct terminology for the concepts of Clipping out Dead Air, Annotating, and Concatenating? Since GK knows this is easy with perl in the text world, is there an analogous simple perl solution in the audio world? What's a good place to start?

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