A CD-player plays an audio-CD (although once in a while you'll see an old one that doesn't play burned CD's or CD-RW). That's the usual CD as you buy it, with 15 to 20 tracks and 60 minutes of music maximum.
A 'modern' CD-player (especially found in cars) will be able to play a data-CD with mp3-files. That's 10 to 12 hours of music in low-quality (96 kbps) mp3-files, less with higher quality mp3's.
So it depends on your cd player what you should use.
Kees
in a coinventional cd player it won't play but in my Comp, it does play.
I have win 7 Pro 64 and using CDburner.
The application CDburner gives me 2 choices to burn music. Which one should i be using?
1- Data Disc: allows you to create ISO images, burn usual Data discs MP3-CDs
2- Audio disk: which allows you to create audio disk.
The disks' that i am using are CD-R

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