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Friday, June 13, 2008

The RATParts CAB Files at TWIAR!

Next time you swing by www.twiar.org, check the left side column on the main page. There is a separate option for the Random Access Thought archive. Should you click on this link, you will be connected to www.twiar.org/n2fnh/RATParts.

This is a public repository of Random Access Thoughts, Random Access Files, associated special feature promos and QSL card offers. But as you glance at the list you will see that the files carry a .CAB extension. The CAB or Cabinet format is an archiving scheme employed by most Microsoft programs, including those used to install the Windows operating system. CAB files offer both file compression and file grouping.

So why are the Random Access features stored in this way? The answer has less to do with file compression and more to do with file protection. When production of the Random Access features shifted from the W2XBS palatial estate in Poestenkill to the N2FNH laboratory here in Albany, it was observed that uploaded audio files to our FTP server would sometimes arrive in corrupted form. As time progressed, this became a more consistent and a more persistent issue. So George and I performed a few experiments.

First, some test WAV files were uploaded. They arrived in corrupted form. Next, the same files were compressed as a ZIP file and were uploaded. They arrived in corrupted form. The next step involved yet another file compression trial, encapsulating WAV into CAB, which were subsequently uploaded. They arrived intact. After multiple launches, it appeared that the Random Access special features encased as CAB files were bulletproof!

Like a ZIP file, you can use WinZIP or IZArc to unshackle the delicate contents and lovingly place them on your hard drive or digital audio playback device.

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