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Listen to the sounds of network traffic Apps
Although it seems this program has been around since 2004, it's still fascinating: Sound of Traffic

The blurb from the site says:
Sound of Traffic is a Java "application" [that] converts TCP/IP header information into midi notes via the Java Synthesizer. The purpose is to listen in on network traffic in ordered time, via a tempo, rather than realtime, which could be more chaotic. In this sense it becomes closer to music then noise.

Play back of traffic is sorted by source and destination addresses and ports. Ports are assigned individual midi instruments and played on odd or even ticks depending upon whether it is a source or destination packet. The note played by the port is based upon the number of hits (amount of traffic) occurring on the port.
Only works on OS X and UNIX.

[robg adds: I tested it, and it works. It asks for your root password, but your admin user's password is sufficient. I had Little Snitch set up to block any outbound traffic when entering the password, and nothing came up, so this appears to be safe to use (but as always, use at your own risk, as my testing really cannot be considered all-encompassing).]
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Listen to the sounds of network traffic | 3 comments | Create New Account
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Listen to the sounds of network traffic
Authored by: IanWalker on Feb 21, '06 10:27:37AM

Wow, my network traffic at work is surprisingly ominous.


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Listen to the sounds of network traffic
Authored by: mayo2ca on Feb 21, '06 11:17:03AM

The password is most likely so that it can access the BPF (/dev/bpf) device which lets is observe the packets. Only root/admin has permissions to read from this device.

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Listen to the sounds of network traffic
Authored by: shorts on Mar 11, '06 04:24:39AM

Great way to experiment with music!

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