On Oct 7, 2005, at 7:25 PM, Marta Edie asked: > I have a question, folks : When I want to burn a CD, then I can > set a pause between songs from none to several seconds. But this > is only possible when the Audio CD button is pressed. Now if I > press the MP3 button, then this is not possible. Why? And: if I > burn as Audio CD, what does that mean? Can anybody play it on any > player? Can any player play in MP3 format? Is recording in Audio CD > compressed? More or less than MP3? --- And while importing, should > I use MP3 ? or any other format?Thanks for a little insight into > this musical "Wirrwarr" .
An audio CD is about the same format as a CD that you buy in the store. The audio CD format was designed back in about 1980 for the sole purpose of storing audio information. It contains uncompressed sound files in a format that can be played by any CD player. Audio CDs contain special track information that tells the player how long to pause between tracks. When you make a CD with MP3 files, it is just a data CD with MP3 sound files on board. They could just as easily be pictures or a letter to George Bush. There is no special pause information built into the standards for data CDs. Most CD players cannot play the MP3 tracks on data CDs, but many can handle both formats. The sound on an audio CD is uncompressed and is fed to your player at a rate of about 1400 Kb/s. (Kb/s = kilobits per second = 1024 bits per second) It is a very old format designed for 30 year old technology. Typical MP3 files are compressed audio fed to your player at a rate of 128 Kb/s. The compression consists of mathematical magic designed to throw out redundancy and parts of the sound most of us cannot hear. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.math.louisville.edu/pipermail/macgroup/attachments/20051007/45969d8c/attachment.html -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2398 bytes Desc: not available Url : http://www.math.louisville.edu/pipermail/macgroup/attachments/20051007/45969d8c/attachment.bin
