For the radio range testing on the One Laptop Per Child project, I've added audio to Lars Strand's Python ping program. Now it makes a sound on a twelve-tone scale where the pitch is related to the time it takes for an ICMP Echo Request packet (ping) to return. By default, the pings are at about 20 times per second, set by the length of the sound samples. Such rapid feedback makes it easier to learn where wireless coverage is good, or bad. It can also be used for regular reporting of the health of an internet connection, using the --noflood option, but the output may be irregular because the PCM device is not being fed at the speed it desires. af-ping script is at: http://quozl.linux.org.au/darcs/olpc-radio-testing/bin/af-ping af-table-create uses sox to create the sound files in advance: http://quozl.linux.org.au/darcs/olpc-radio-testing/bin/af-table-create af-ping expects the files to be in /usr/share/olpc-radio-testing/sounds/ but this is easy to change in the script. -- James Cameron mailto:quozl@us.netrek.org http://quozl.netrek.org/