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Beginners Guides: Creating MP3 Music Files
Beginners Guides: Creating MP3 Music Files  - PCSTATS
Quick and simple instructions on how to make MP3s out of your CDs, and make MP3s into audio CDs back again. Digitized audio is governed by bit-rate, or the amount of song data that is transferred per second to the device that is playing the song. A digital audio recording using the 'Redbook' audio CD standard uses 1.4 million bits of data per second. This is the amount of information necessary to play a virtually identical digitized version of the original analog music.
Filed under: Beginners Guides Published:  Author: 
External Mfg. Website: Beginners Guides Dec 31 2003   M. Dowler  
Home > Reviews > Beginners Guides > Beginners Guides

Encoding level vs. sound quality

With the 'file creation' box, you can change the naming format of your MP3s.

Pretty self explanatory...

Close the options screen for now; let's move on to the various options available for actually encoding the MP3 files from your music:

Encoding level (bit rate) vs. sound quality and size

Given that the 'bit rate' of an MP3 file is a direct measurement of how many bits of data the file transfers to the player for each second of the song's duration, you can see how this would affect the overall sound quality.

More data per second means more of the original sample of the song is being retained, which means higher sound quality... and so it does, to a point. The point is, audio is a subjective thing, and one person's take on how a particular song sounds encoded at a certain bit-rate will be different from another's opinion. It also weighs heavily on the quality of headphones or speakers you listen with.

With a pair of standard 'earbud' headphones for a portable MP3 player it really won't matter much if you choose 128kb/s, or 196kb/s. However, if you're a bit of an audiophile and intend to play back MP3s on a pair of Grado's headphones, you're much better off choosing the highest quality encoding rate possible. I swear by my Grado SR-80s, but the 'digital slurr' of a low quality MP3 certainly doesn't have anything to hide behind, so they can be unforgiving.

Most MP3 creation software will give you options for various bit-rates to increase or decrease the size of the file created and commensurately increase or decrease the sound quality. There are several common bit-rates that are widely used, and most software sticks to these ass they provide a wide range of quality and file size options.

64Kb/s: discernibly lower sound quality than the original CD recording, in general. Produces really small files though. 22 - 1 compression ratio.

96Kb/s: Considered 'near CD quality.' You will probably be able to tell the difference fairly easily between a file of this bit-rate and the original, at least if the original has a lot going on musically. 14 - 1 compression ratio.

128Kb/s: The border of what is considered 'CD quality' sound. Not co-incidentally, this is also by far the most popular bit-rate used to encode files, especially on the various peer-to-peer services. Delivers an 11 - 1 ratio of compression.

192Kb/s: A popular choice for slightly better quality and larger files. 7 - 1 compression ratio.

256Kb/s: Getting close to the upper limit. Sound quality should be virtually indistinguishable from the original, unless you are a true audiophile (and if you are, why are you creating MP3 files anyway?). 5 - 1 compression ratio.

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Contents of Article: Beginners Guides
 Pg 1.  Beginners Guides: Creating MP3 Music Files
 Pg 2.  How to Create MP3 files from CD audio disks
 Pg 3.  — Encoding level vs. sound quality
 Pg 4.  Variable bit-rate
 Pg 5.  How to create audio CDs from mp3 files
 Pg 6.  Alternatives to MP3

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