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-
- Mpeg Layer 3 CD Ripping FAQ V.1b
- By the Fourth Stooge (Konfuzion & CEA)
-
- This version will be very rough. It will be the foundation for the FAQ.
- Anybody interested in adding to it, please join #warez-galore or #CEA on
- efnet IRC. We will not answer any questions that have already been answered
- on the FAQ.
-
- I. What is Mpeg Layer 3?
- II. How can I rip CD-quality files myself?
- III. What programs are out there and how do I use them?
- IV. How do I play Mpeg Layer 3 files?
-
-
- I. What is Mpeg Layer 3?
- 1. The first thing you must know about Mpeg Layer 3 files (I will refer
- to them as mp3's from this point) are actually MPEG-1 Layer 3 files.
- (Not MPEG-3's as is often said)
- 2. MPEG-1 Layer 3 is a standard of the Moving Pictures Experts Group.
- This group is an international orgainization who creates audio and
- video standards for compression. One commercial use of the MPEG
- technology is the DSS satellite system. (The little 18" dishes you
- see at all of the electronics stores.) This system utilizes MPEG-2
- audio/video compression.
- 3. Mpeg Layer 3 is a standard for audio compression. It supports
- up to 44.1kHz audio (same sample rate as audio cd's!). I have never
- put a scope to an audio CD and an mp3 file but to the ear they are
- identical. With this standard, you can encode a song from a CD and
- play it on your pc and never hear the difference.
- 4. MPEG has had a difficult time becoming the de-facto standard. This
- is because licensing a good audio/video compression standard can be
- very expensive. Another thing that has made standardization
- difficult (especially with computers) is that there are so many
- companies with their own standards and they all tout them as being
- the best/fastest. You probably have several video players installed
- on your computer now.
-
- II. How can I rip CD-quality files myself?
- 1. Ripping an audio CD actually takes 2 steps. You must first convert
- the audio image from a cd to a wave file (.wav). This can be done
- with a number of programs, both freeware/shareware and commercial.
- You must then encode the file to meet the MPEG standard. You may
- also note that not all cd-rom drives have the ability to give you
- a digital copy of a song. Almost all scsi drives support this. If
- you know of a non-scsi drive that supports it, then please let me
- know.
- 2. I use EZ-CD Pro for Windows 95 so I will use it as an example. I
- bring up the Disk Info/Tools option. This allows me to see the
- images on the cd. I select one of the images and tell it I would like
- to read the image. It is automatically converted to a wave file. I
- can then proceed with the next step. This faq will cover other
- packages in later versions.
- 3. The next step is to encode the file. THE program on the pc and unix
- L3ENC by Fraunhofer. You can pick up the shareware version by
- following links from http://www.mpeg.org. The command line you want to
- use is as follows:
- l3enc c:\infile.wav c:\outfile.mp3 -hq -br 128000
- The -hq portion is for high quality mode. The -br 128000 is to make
- the output ISO compliant. You must have the registered version of
- L3ENC to use the -br option. Otherwise, it will default to 112000
- and can only be read by WinPlay3 (I will talk about this program
- later.) This is a lengthy process. It takes my 120mHz Pentium with
- 48 megs of ram about 1/2 hour per song on average but will compress
- a 40 meg file down to about 3.5 megs.
-
- III.What programs are out there and how do I use them?
- 1. The afore mentioned program L3ENC is a fantastic little program. It
- is used for encoding the files from waves to mp3's. The package also
- comes with a decoding package that will convert the mp3's back to
- wave's so you can write them back to CD's. The program is available
- for dos, linux, sun, and soon Windows 95. The author says the Win95
- version will be a rea-time encoder. After seeing how long it takes
- on my machine, I doubt it but any speed increase is welcom.
- 2. There are quite a few packages that will allow you to read the audio
- directly from CD. Almost all packages used for creating CD's also
- support ripping songs from CD's. It is important to realize that the
- songs are being read digitally to wave files and not just being
- digitized by the windows recorder program. If you attempt to
- digitize a song from a CD like that, then you'll get really crappy
- quality.
-
- IV. How do I play Mpeg Layer 3 files?
- 1. There are several programs that will allow you to play mp3's. The
- best for Windows right now is WinPlay3. It will support the 112000
- bit rate the unregistered version of L3ENC puts out. You should
- really get the registered version, however. It is best to encode
- using the standard. As this becomes more poplular, we will get other
- players.
-
- DISCLAMER: This FAQ is intended to help you archive your personal collection
- of songs that YOU bought. It is in no way promoting the pirating of audio
- cd's. The author of this document does not give you permission to receive
- this document if your intent is to break the law by using teqniques described
- here. You may only create ARCHIVAL copies of YOUR CD's and you may not
- distribute them.
-