MP3

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MP3

1. MPEG-1 Audio Layer-3: tradename for software created by the Motion Picture Experts Group that enables files to be compressed quickly to 10% or less of their original size for storage on disk or hard drive or esp for transfer across the internet
2. an audio or video file created in this way

MP3

MP3

(MPEG-1 Audio Layer III) The audio compression technology that revolutionized digital music (see "MP3 Shook Up the Industry" below). Derived from the audio sections of the MPEG-1 and MPEG-2 video specifications, MP3 compresses CD-quality sound by a factor of roughly 10, while retaining most of the original fidelity. For example, a 40MB CD track is turned into approximately a 4MB MP3 file. See CD-DA.

MP3 files are played on the computer via media player software, such as iTunes and Windows Media Player, as well as in iPods and audio equipment (see digital music player). MP3 sound quality cannot fully match the original CD, and true audiophiles complain bitterly, but millions of people consider it "good enough" because they can pack thousands of songs into a tiny pocket-sized device.

Ripping/Importing
Converting a digital audio track from a music CD to the MP3 format (or other audio format) is called "ripping" or "importing," and this conversion function is built into iTunes, Windows Media Player and other jukebox software.

Bit Rates Are Important
While 128 Kbps is considered the norm for MP3 files, MP3s can be ripped to bit rates up to 320 Kbps. The higher the rate, the better the sound and larger the file. There are variations of MP3 and other widely used audio formats (see codec examples). See high-resolution audio, MP3 VBR and mp3PRO.


The Encoding Bit Rate
This dialog box from Windows Media Player shows "Audio quality" set to 192 Kbps. The slider selects four encoding rates: 128, 192, 256 and 320.







MP3 Shook Up the Industry


By the end of the 1990s, music fans discovered that a CD song title converted to MP3 would still sound pretty good even though it was only 1/10th the size of the original CD track. Smaller files meant faster downloading. At an average of 4MB, it took less than 15 minutes to download a file over an analog dial-up modem. With a broadband connection on a college campus, it took seconds.

MP3 created a worldwide auditioning system for new musicians who could freely distribute their music to gain an audience. It also let people swap copyrighted titles with impunity. File sharing services such as the original Napster and Kazaa made it a global phenomenon, and the record industry went into a frenzy over violations of its copyrights (see Napster). Today, copyrighted MP3 files are still shared over the Internet; however, online music stores, including the resurrected Napster, sell songs legally and successfully. See peer-to-peer network and DRM.

Developed in Germany
MP3 was developed in the late 1980s by the Fraunhofer Institute in Germany. Released in 1993, MP3 uses perceptual audio coding to compress the data by eliminating frequencies that would not normally be heard because they overlap and cancel each other. See ID3 tag, audioblog, podcast, iPod, AAC, codec examples, perceptual audio coding and cuckoo egg.


Proof of the Pudding
These examples taken in a Mac show the original CD file sizes (top) and the resulting MP3 files (bottom). The CD was ripped to MP3 in iTunes at a recording rate of 160 Kbps, and the album was reduced from 344MB to 39MB. When a music CD is inserted into a Mac, the CD's files appear in Apple's AIFF format, which is the same uncompressed 16-bit PCM format as the CD (see AIFF, CD-DA and PCM).



Proof of the Pudding
These examples taken in a Mac show the original CD file sizes (top) and the resulting MP3 files (bottom). The CD was ripped to MP3 in iTunes at a recording rate of 160 Kbps, and the album was reduced from 344MB to 39MB. When a music CD is inserted into a Mac, the CD's files appear in Apple's AIFF format, which is the same uncompressed 16-bit PCM format as the CD (see AIFF, CD-DA and PCM).
References in periodicals archive ?
First of all, when a video is downloaded using the Video Downloader tools, an MP3 file will be extracted after download is complete if a check mark has previously been placed near the "Save audio track" option.
Once this is done, the Mp3 file needs to be uploaded by clicking the upload button present in this link: http://www.songdew.com/godrejtweetatune#choose-entries
All the distances between this input humming data and all the reference MP3 files are obtained by MIN or SUM rule, respectively, and one reference MP3 file whose distance is smallest is determined as the correct reference one to the input humming data.
Monday, June 17, 2013: You will no longer be able to purchase MP3 files from Flyte after this date.
Fully charged, the built-in lithium ion is good for an uninterrupted 24-hour record/playback time - with MP3 files.
The big plus comes with Sony's Clear Audio Technologies sound enhancement, which does a great job of padding out the gaps in heavily-compressed MP3 files.
Features include story narration, interactive images, word highlighting, educational games, and stories and songs that are available as downloadable MP3 files. Each area of Early World of Learning includes an Education Center that provides teachers with additional resources that help measure progress and correlate activities to state standards.
The application's server-based architecture does not require installation at agents' desks, and recorded calls can be saved by administrators as WAV or MP3 files and exported via e-mail, hard disk or FTP.
It's offering decent quality MP3 files from all the big four record companies, but most importantly without any Digital Rights Management gubbins attached.
An online music store without digital rights management (DRM) has been launched by Napster, with over 6m tracks from the main and independent record labels to be sold through the site as MP3 files.
You will also need to download the LAME mp3 encoder in order to export mp3 files. The Audacity file is a sound recorder enabling you to record sounds.
Recorded music has evolved from LP vinyl through 8-track tapes, cassette tapes, and compact discs to MP3 files and MP3 players.