Asus Eee PC as a portable audio spectrum analyzer
Recently, I acquired an Asus Eee mini-laptop for work. If you have not seen these PCs, they are inexpensive small laptops with a 7″ screen that run a form of Linux (a modified form of Xandros to be specific). The package is very portable with a 4Gb solid state hard drive, 1Gb RAM, WiFi 802.11 b/g, inbuilt camera and soundcard. Bigger than a Palm personal organizer, but still very portable and arguably more flexible.
I was curious how well baudline would run on this machine. As baudline is not open source it is not in the usual repositories. I directly downloaded the tar file and extracted it on my Eee. To run it you can use the Eee command line (ctl+alt+t in the easy mode), move to the directory with the extracted files and type
(You can write your own script shortcut, if you want.)
Alternatively, open the file manger, move to the directory of the extracted files and double-click on the file “baudline” . Baudline should run and you will see the split screen view of the spectrum waterfall (above) and the spectrum (below). Right click on either of these windows to get the menu options. This application is powerful in its capabilities and I recommend you read the manual on the baudline website.
If you have nothing connected into the mic input, then baudline defaults to the inbuilt microphone. My daughter found it fun to watch the screen as I whistled at the Eee with a sweeping pitch.
So, your little Asus Eee can easily be a portable spectrum analyzer for audio frequencies.