Predictable file lengths and the player can handle variable bit rates, thenĪBR (average bitrate encoding) is the best option, where the encoder will Portable MP3 player (or MP3 discman) that cannot handle VBR. Nowadays, the only good reason to stick with FBR would be if you have an older In quality, because it can encode very complex sounds at exceedingly highīitrates (up to 320kbps) that would be wasteful to use for the whole VBR is on the one hand more economical in disk space than high-bitrate CBR, and on the other hand more homogenous deviation from originalīelow a set threshold) has been reached. Higher bitrates until a certain quality criterion (e.g. What bitrates to use? What about variable bitrates?Ĭonstant bitrate encoding (CBR) uses the same bitrate throughout a track variableīitrate encoding (VBR) takes a "frame" and tries to encode it with progressively There are a number, but my only experience under OS X is with iTunes. but an excellent GUI version integrated with iTunes is available: People notĪfraid of Unix command lines can download and compile the source themselves Gives its commercial counterparts a run for their money. The answer for everybody else is LAME (Lame Ain't an MP3 Encoder, in the Songs bought at the iTunes online music store areĮncoded in AAC - at 128kbps, this encoder cannot be beaten. Than MP3, and if files with somewhat aggressive "digital rights managements"ĭon't totally turn you off, iTunes' AAC (Advance Audio Coding) encoder If you are willing to consider formats other The built-in encloder in iTunes 4 will probably do if "Oooh baby do me one more time" is your idea of a musical experience. Use is perfectly legal, but selling MP3 files encoded from commercial CDs,Īre there any good encoders for Mac OS X? That is, encoding one's own CDs for personal Much higher for images) than lossy algorithms. Is that they generally achieve much lower compression ratios (in the 2:1 range for audio, Representation, but do preserve all the details of the original. in the original file to arrive at a compressed Well as such popular file compression formats as ZIP on PCs, gzip on Unix In contrast to so-called "lossless" algorithms, like GIF for pictures (or Shorten for sound), as MP3 is a so-called "lossy compression" algorithm, which (like JPEGįor pictures) takes advantage of the limitations of human perception toĪchieve very high compression ratios. Of uncompressed music, can hold something like 8-14 hours worth of MP3 That is to say, a regular CD, which holds up to 80 minutes It is an audio compression format that on average yields (claimed) near-CD qualityĪt 1:11, and de facto CD quality at 1:6 to 1:8, the size of the original. The short answer: MP3 stands for MPEG (Motion Picture Experts Group) Layerģ. Nota bene: I have migrated to Mac OS X ages ago. Please don’t expect any of these posts to be long, earth-shattering masterpieces that instantly answer every single question you can think of and completely transform you into a world class podcast engineer. “Little by little, a little becomes a lot.MP3 on Mac OS X Disclaimer: any opinions expressed in this article are those of itsĪuthor ( and do not purport to represent Weizmann Institute of Science policy. Want to receive the Daily Goody in your email, daily or weekly? Subscribe free here.Īnd please keep in mind, the Daily Goody is only a tiny little tip, fact or lesson everyday. Programs that DO NOT use the Fraunhofer MP3 Encoder algorithm: (They use the LAME encoder) Programs for which you can buy an optional Fraunhofer plugin for US $339.15 Programs that encode MP3’s using the Fraunhofer MP3 Encoder algorithm: Encoding your MP3’s using the iTunes application provides better MP3 quality than many other applications because its Fraunhofer MP3 encoder is superior sounding to the more widely used LAME encoder.
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