piesen

Why is it that I can only fit about 28MB on a cd when the cd says it will fit 700MB? I know that the 28MB will take up 79 min I just dont quite get it? Any one care to explain.
Sorry if it had been covered could'n find it

Thanks.

aberkok

My limited understanding of this technology tells me that the figures quoted depends on file format.

The format which means you can listen to your CD on a conventional player (which I think is called "redbook audio" dictates that a maximum of 80mins. (or your 28MB) can be held on the disc, whereas if you fill the disc with data files (say even mp3 format), you could hold up to 700MB.

More technical explanation coming in 1....2....3.....

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n0nsensical

answered well above and below before I could edit in something better

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spectre

700 megs/ 80 minutes means two things:

1.) if you're burning a regular audio CD, it will only hold 80 minutes worth of music.

2.)if you're burning a data CD, such as mp3, wma, or other highly compressed audio format, you can fit 700 megs (which is several hours of music)

I'm guessing you're burning an mp3 or wma CD, if that's the case, ignore it being 80 minutes and just worry about the 700 MB.

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skaven

Actually the 700MB/80min are technically the same thing. A 700M CD-R can hold 80 minutes of CD-quality PCM audio ("normal" CD audio - 16bit, 44khz WAV format), which occupies 700M. If you prefer to fill this space with data, that's you're perogative.

28M of data is not a full CD. When you burn MP3s to a CD (and make the CD playable in regular CD players) the MP3s get decoded into PCM WAV files, which are much much much larger than the MP3s they are created from. Thus 28M of MP3s could theoretically fill 700M of PCM audio. Though in my experience they would have to be highly compressed MP3s (64kbit or so) to do so.

If you were to burn the same MP3s in their native data format (just a regular data CD), then you'd only be burning 28M of actual data to the CD (far less than the 700M capacity), however the CD would only be able to be read by computers and MP3 CD players.

Its 4:30AM and I'm still drunk, so this reply may or may not make sense...

aKula

If you're are planning on listening to the CD on non MP3 CD players, then you will have to burn it as an audio CD. If you're using an MP3 CD player then you can burn 700MB of MP3 files on it and listen to them.

catback

sounds like your burning 28MB of song files from your computer onto an audio cd, the only number that applies is the 80 mins. That's your audio length limit on the cd because your not making a data cd.

piesen

Thanks everyone
What im doing is burning a audio book in mp3 format onto a cd so I can listen to it the car while i traffic.

Thanks again