Fluency Milestone 12 - Digital Multimedia for Deadheads
For quite some time, I have been a Deadhead, and very interested in show trading community. In the world of jambands, this is the community of individuals that record live shows, enhance the sound quality, compress the format, and post them online. While this may sound much like Napster and Kazaa, the difference is that the music is completely free and legal. This is because many of these bands allow free "patches" into the soundboard during concerts, or at minimum, allow individuals to set up microphones and DAT machines or CD burners on the concert floor.
With that said, I found Snyder's discussion of digital media compression to be very interesting. I do not personally record shows, but I do frequently download them from sites such as archive.org and etree.org. These sites link show traders to each other, and they create an online database of files. When I first started downloading shows, I had to get the proper software. Many of these files were in formats I never heard of - lossless formats. These formats include .shn (Shorten), and .flac (Free Lossless Audio Codec). I knew these formats were lossless, but I was unsure of what that really meant.
While the sites provide a general overview of lossless versus lossy, Snyder explains that in lossless compression, the original representation of 0's and 1's can be perfectly reconstructed. In lossy compression, some of the data, usually on the high end of the audio spectrum is lost. Therefore, the lossless format allows users to decompress the .flac or .shn files back to .wav files (the format needed to burn audio to CD), without a loss of data.
There is, of course, a tradeoff with lossy and lossless formats. The lossless format cannot be compressed nearly as much as MP3's. As Snyder notes, MP3's can achieve compression ratios greater than 10:1. Therefore, lossless files tend to be much larger than MP3's. An MP3 file may be 4MB large, whereas a FLAC file may be 20-30MB. On a large hard drive, this is not a problem. However, if you have little room left on your hard drive, you may find that these files quickly dissipate your resources.
Perhaps the most attractive aspect of these programs is that they are Open Source (.Flac more so than .Shn). This means that the community that uses the software is constantly collaborating to improve it. Furthermore, the software is free of cost. In one sense, this was a necessity because of the culture and community that uses the software. Nevertheless, these are high quality file formats, and all of the support software (such as decompression tools, bit torrent, FTP clients, etc.) can be obtained free, as well.
In closing, my "Aha!" moment for the week was one of those, "So this is how ____ works" moments. I have used lossless compression for some time but never bothered to learn the inner-workings. I am sure that many end-users of computers operate countless programs, without the slightest idea of how they work. The beauty of understanding the underlying structure is that you are able to troubleshoot, learn, and adapt. These will serve you well not only in your personal life, but in your professional life, as well. This seems to be what FIT is all about. It is more than learning a few programs. Being FIT means being inquisitive, and willing to learn new things. I may never use audio compression as a professional, but if I am able to educate myself about computer programs utilized in my organization, I will be a step ahead of the rest.
