(Approx. 1,205 words)

Converting CD-based Music to Compressed Audio Files
By Mike Moore, Editor, Bowling Green Area Microcomputer User Group, Kentucky
www.bgamug.org
ml.moore(at)insightbb.com

Obtained from APCUG with the author's permission for publication by APCUG member groups.

I spent the equivalent of two or three days in January, working a few minutes at a time, converting all of our CDs to MP3 format. I had been dreading this project, thinking that it would take too much time, but it really was not that bad and the results are going to be worth it.

A few years ago I purchased a 400-CD jukebox type CD player. This device does has the capability of displaying a short line containing the album's title, using a standard PC keyboard, but the process is complicated with problems. It's easy to get CDs in the wrong slot and of course, you can only play them in the room where you've physically situated the jukebox unit.

In the past few years, we've been getting away from the album and becoming more focused on individual songs. This lamentable trend has been fueled by the 99 cent price point associated with downloading music by the song. Artists and producers alike have vilified this process, claiming that the artistic sum worth of songs on an album is greater than the tunes taken as individual songs.

I can buy into this sadness, to a point. I remember the smell of vinyl LPs, unwrapping the cellophane outer wrap, and the incredible detail the producers went into in packing artistic value into the finished product, right down to the order the songs appear on the album. These days, you just Google the album or artist title and download the Jpeg, that's about it. For a fee, a program called iTunes will do this for you automatically.

So why would a guy spend the time to rip (compress) the tracks of a CD or other ancient audio product to MP3 files? There are a few good reasons to do this.

For one thing, the devices that play music have become decentralized. What I mean by that is if you can imagine your computer as the "record player," then it's not much of a stretch to think of playing music anywhere in the house, car or workplace.
 
Doing this in the past meant locating the song you want (which may or may not be an easy task), finding the CD (or tape, or LP) it's recorded on, and hoping that it's not damaged.

Then once you've got it, you carry it to where ever you want to hear it. For me, this was often the car, and a car is a great place to scratch or otherwise ruin a CD, and I've also known friends whose entire CD collections have been stolen from vehicles.  Physically moving music and other files from player to player is sometimes humorously referred to as "Sneaker Net"

But once you begin to think of your songs and other media in terms of compressed MP3 files, they become at once more searchable, more replaceable, and more portable.

Compressed audio files, though the wonder of a shared internet database called Gracenote (formerly CDDB), contain informational tidbits that can searched. On the other hand, ordinary music tracks on a Compact Disc have no information associated with them at all, not even the name of the song. By converting CD-ROM music to MP3 files, your database can pull up a playlist for you using information encoded in the MP3 file. Most ripping software (such as C-Dex, available at http://cdexos.sourceforge.net/) will query the CDDB so that you won't have to manually type in the names of the songs or the name of the CD.

Compressed audio files can be stored on any hard drive in the house and can be made available on inexpensive MP3 players, iPods, and Multimedia computers that attach directly to your sound system. There is usually no special hardware to buy - you can just feed the stereo output from your computer's sound card to the audio input on your TV or stereo amplifier.

Most of the MP3 player devices out there do not require a lot in the way of software - you generally plug them into a computer, they assign themselves a drive letter, and you can just copy your songs to the devices as if they were another hard drive. There are even self-contained wireless hard drives (see: http://www.apple.com/airportexpress) that will broadcast your music wirelessly to any networked computer in the house!

Compressed audio files cannot get scratched like CDs do, and if your iPod or MP3 player is stolen or accidentally formatted (happens all the time!), or even if your entire CD collection is stolen, it's no longer the end of the world. You just re-copy the files back to another device and you're good to go. 

Though not exactly small, compressed audio files do lend themselves much better to e-mail. A typical MP3 music file is around 3 to 6 megabytes, which is just under the threshold of being too large to send to someone using dial-up internet. If both ends of the connection have high-speed, it's no problem at all, as this amount of data can be transmitted by most DSL and cable internet services in about 10 or 20 seconds. The MP3 compressed format is "lossy" in the sense that some of the music data is lost during compression, compared to the original recording, however I've never been able to tell the difference between a compressed song and a non-compressed track on a CD.  The data you lose is not data that manifests as part of the music.

By the way, the songs as recorded on CDs you buy are very large - 50 to 80 megabytes would not be uncommon.  For those of you audiophiles who need compression but don't want any data loss, consider using the FLAC mode of compression (See http://flac.sourceforge.net for information). FLAC stands for "Free Lossless Audio Codec"

So, there are a host of reasons why we would want to compress our audio collection, but what is the downside? The only problem I can think of is that most automotive and older CD players cannot recognize the MP3 or any computer generated music format. Some of the newer CD players can, but it's not something that people generally know. So, for example, when I transferred an audio book selection to CD for my wife, she found that the CD player in her car refused to play the media, even though her car is not that old. My car, a Chevy Monte Carlo, played the disk without a problem even though it's an older car than hers. So in this situation you may want to take advantage of software that does the reverse of ripping - it would take MP3 files and lay them down on the CD as if they were ordinary Audio CD tracks. iTunes and many CD-writing utilities such as Nero will do this for you.

Now does anyone wanna buy a used 400-CD jukebox player?

This article has been provided to APCUG by the author solely for publication by APCUG member groups. All other uses require the permission of the author (see e-mail address above).