I am, in fact, working on a perl module which provides a real-time interface to the crossplatform PortAudio API. This would provide perl with the ability to record and play audio in real-time via perl callback functions. I currently have ugly proof-of-concept code which works on Windows and Linux (my test app is a .wav player which lets you pause and resume with the keyboard), and hope to clean up and upload to CPAN soon.

I had forgotten about this project of mine, and relegated it to the back burner, assuming I was the only one interested in it. :) I'm enthused to see that there is more interest in adding this much needed ability to my favourite language.