How does it all fit on?

8009514

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I make up my own 'Best Of' compilation albums The music files I use have nomally been ripped in wav so are pretty big (1411kbps). So my question is, how does about 750MB of music fit onto a cdr when I come to burn it. The cdr limit being 700MB. Is something being lost somewhere? I don't understand.
 

idc

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All I can assume is that the CDs you have have more than 700MB of space. Is it possible you have burnt the files in a smaller format than you think and that some sort of conversion has taken place during the burning?
 

8009514

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Thanks idc. Well I've checked the cdr's I use and it states 700MB Data / 80 mins Music. Definately wav files I'm selecting to burn. I can only assume something happens in the burning process when the files change to CFDS when on the disc. But, I just don't know enough about the subject really to know what happens.
 

idc

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Not sure here either. One thing, when you put the CD in and right click on the icon in My Computer that has appeared, does it not say exactly what size the file is? I would be surprised if it is spot on 700MB.
 

8009514

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idc:Not sure here either. One thing, when you put the CD in and right click on the icon in My Computer that has appeared, does it not say exactly what size the file is? I would be surprised if it is spot on 700MB.

Well had a crack at that. Doesn't really give any info. except to sat 'Remaining Bits 0' Which it says for all cds. I'm wondering if when it says 700MB Data on a cdr it is referring to excel, word type docs. Whereas music files are treated differently and the only limit is the 80mins. I just don't really know, but would like to.
 
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8009514:
idc:Not sure here either. One thing, when you put the CD in and right click on the icon in My Computer that has appeared, does it not say exactly what size the file is? I would be surprised if it is spot on 700MB.

Well had a crack at that. Doesn't really give any info. except to sat 'Remaining Bits 0' Which it says for all cds. I'm wondering if when it says 700MB Data on a cdr it is referring to excel, word type docs. Whereas music files are treated differently and the only limit is the 80mins. I just don't really know, but would like to.

You are correct the amount of music you can put on a typical CD that will play on all CD players is limited to 80 mins - Although the file size may be over 700MB the actual length must have been less than 80 Mins otherwise it would not have fit on the disk.

If you were to burn the files as a data disk then not all of the files would have fit as this would exceed the 700MB
 

Tonya

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Trivia time:

The original specification from Philips regarding the CD format was that it had to have a capacity of at least 74 minutes long, as to be capable of playing Beethoven's 9th symphony on one disc.
Today's CDs can deliver 80 mins, but even that can be exceeded by so called overburning (not really within specification but it will work on most players).
The longest commercial CD available, if I'm not mistaken, is "a classical piece by Douglas Yeo which is timed at 80 minutes and 17 seconds"

The amount of "music time" on the CD is limited only by the actual capacity of the files contained on it.
Which is why an "original" CD mastered in .cda format (linear PCM) by the correct specifications will be generally limited to 80 mins and when using .mp3 may many more hours as each minute of music takes up less space on the CD.

DTS audio discs use ordinary Compact Discs as carriers but the music is encoded in a different way to a normal CD, yet still conforming to the red book standard, so depending on the encode bitrate, the playing time is different.

Data is data, so there is no actual size difference between a CD track of 220Mb and a Word or Excel document of 220Mb.

I remember reading that some research group in Ireland many years ago coming up with a different way of storing the info on a CD that could enable more efficient data packing, but it wasn't commercially viable.
 

8009514

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Tonya:

Trivia time

Data is data, so there is no actual size difference between a CD track of 220Mb and a Word or Excel document of 220Mb.

This is where I get confused. 'Data is data', yep understand that, whether it be music files or documents. But if I try to put 750Mb of docs onto a cdr it will not fit. Yet if I burn 750Mb of music files onto a cdr it does fit. But its all data though. I'm very confused!!!!

Its another of those things which I don't understand, but wouldn't mind having a bit better knowledge.
 

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