Instead of >>/dev/dsp, you can also try |aplay (or a similar program). I have no /dev/dsp, so I needed that to hear anything. That said, it's pretty neat, and maybe you could do a morse JAPH? :)
Yeah, I got sound with " | aplay -f S16_LE -c1 -r 8000 -t raw" , but it wasn't like 'Mary had a little lamb'. If anyone knows better settings, let me know.