quick CD burning question
23 July 2005, 11:14 PM
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quick CD burning question
This is so basic that I'm sure NSR can answer it 
I have a playlist of 80 songs, average of 3MB each (.WMA). That makes 240MB (more or less). Average of 3 min each, total time 240 min. I have a CD-R of 700MB / 80 min.
Why can it only fit 80min of music, and not 700MB?
Sorry for being fick...
I have a playlist of 80 songs, average of 3MB each (.WMA). That makes 240MB (more or less). Average of 3 min each, total time 240 min. I have a CD-R of 700MB / 80 min.
Why can it only fit 80min of music, and not 700MB?
Sorry for being fick...
23 July 2005, 11:28 PM
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But that suggests that 700MB of data is not the same as 700MB of music - yet surely they're both just a collection of 1s and 0s? How does it make a difference whether the 1s and 0s become a Word file or a .WMA file?
23 July 2005, 11:34 PM
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...because MP3 is a compressed format. The format of CD-Audio is uncompressed....ie, every 0 & 1 is explicitly defined.
With compression generally, if you have a sequence of, say, 25 0's in a row, compression would instead say "the next 25 bits are '0'" instead of "0000000000000000000000000" - as you can imagine, the former can be stored in less bytes than the latter.
MP3 also aims to intelligently compress it so as to lose as little audio quality as possible, and therefore remove any 'non-important' 1's & 0's.
With compression generally, if you have a sequence of, say, 25 0's in a row, compression would instead say "the next 25 bits are '0'" instead of "0000000000000000000000000" - as you can imagine, the former can be stored in less bytes than the latter.
MP3 also aims to intelligently compress it so as to lose as little audio quality as possible, and therefore remove any 'non-important' 1's & 0's.
Last edited by imlach; 23 July 2005 at 11:37 PM.
23 July 2005, 11:34 PM
#5
That's 80 mins of UNCOMPRESSED music - which works out at about 700meg.
Mp3s and wma are compressed so you can fit much more than 80mins on....but only as mp3 or wma format - which you'll need either a compatible cd player or PC to play it on.
A normal boggy standard CD player can only play raw format (not compressed) music - if you burn a mp3 or wma as a "music CD" the software will decompress the files, and thus take more space.
To fit more than 80mins of music on, you need to burn the cd as a "Data CD" But you'll need a mp3/wma compatible CD player or a PC to play the disc
HTH
Mp3s and wma are compressed so you can fit much more than 80mins on....but only as mp3 or wma format - which you'll need either a compatible cd player or PC to play it on.
A normal boggy standard CD player can only play raw format (not compressed) music - if you burn a mp3 or wma as a "music CD" the software will decompress the files, and thus take more space.
To fit more than 80mins of music on, you need to burn the cd as a "Data CD" But you'll need a mp3/wma compatible CD player or a PC to play the disc
HTH
23 July 2005, 11:35 PM
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A CDR will old either 700MB of data or 80 minutes of audio; this is substantially more than 700MB. Put simply; different book standards use the available space in a different way. If youre converting the 200+MBs of MP3 tracks to audio then you will only be able to write 80 minutes of audio after theyve been converted to the audio disc book standard.
Simon
Simon
23 July 2005, 11:42 PM
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Originally Posted by imlach
...because MP3 is a compressed format. The format of CD-Audio is uncompressed....ie, every 0 & 1 is explicitly defined.
With compression generally, if you have a sequence of, say, 25 0's in a row, compression would instead say "the next 25 bits are '0'" instead of "0000000000000000000000000" - as you can imagine, the former can be stored in less bytes than the latter.
With compression generally, if you have a sequence of, say, 25 0's in a row, compression would instead say "the next 25 bits are '0'" instead of "0000000000000000000000000" - as you can imagine, the former can be stored in less bytes than the latter.
So the next puzzler - how do I burn as compressed? Just got crappy WMP10, RP10, and I think Pinnacle, but no Nero unfortunately.
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23 July 2005, 11:43 PM
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Download iTunes for your PC. It can convert MP3 to CD-Audio and is also freeware. Plenty others for the PC, but that's the first free one I can think of 
Edit : Actually now I'm confused!? You've got WMA format files, but are you wanting to make them playable in a bog standard CD player? If so, you'll need 3 x CDs. Or do you want to convert WMA to MP3?
Edit : Actually now I'm confused!? You've got WMA format files, but are you wanting to make them playable in a bog standard CD player? If so, you'll need 3 x CDs. Or do you want to convert WMA to MP3?
Last edited by imlach; 23 July 2005 at 11:46 PM.
24 July 2005, 12:03 PM
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Morning chaps 
I've got audio CDs, which I've ?ripped/copied to the PC hard drive. They show up as .wma files in Win Explorer. I'm trying to get them all onto one CD - I know it won't play in hi-fi, but I have a new car stereo which reads mp3 and wma, so if I can get as many tracks as poss on one disk, I don't have to carry/change CDs on a long journey.
What's annoying me now is that in my My Music folder I can only see about 30 tracks. Yet in WMP10, I can see the whole 3.5 hr playlist that I rigged up (six months ago and pre-virus-rebuild). If I select "burn playlist to CD" it only burns as uncompressed, ie 20-odd tracks per disc. I can't see how to "burn as data" or "burn as compressed". I burned four discs last night and almost finished it.
If I try to take Ali's suggestion to drag and drop (wassat, in Win Explorer?), then I can't find all the tracks on the playlist to drag them. Yet they're clearly there somewhere as I burned them last night, uncompressed. Reeeeeally odd.
EDIT - Think I've found it! WMP10, Burn screen, right hand column is headed Audio CD - change it to Data CD! Trying as I type...
I've got audio CDs, which I've ?ripped/copied to the PC hard drive. They show up as .wma files in Win Explorer. I'm trying to get them all onto one CD - I know it won't play in hi-fi, but I have a new car stereo which reads mp3 and wma, so if I can get as many tracks as poss on one disk, I don't have to carry/change CDs on a long journey.
What's annoying me now is that in my My Music folder I can only see about 30 tracks. Yet in WMP10, I can see the whole 3.5 hr playlist that I rigged up (six months ago and pre-virus-rebuild). If I select "burn playlist to CD" it only burns as uncompressed, ie 20-odd tracks per disc. I can't see how to "burn as data" or "burn as compressed". I burned four discs last night and almost finished it.
If I try to take Ali's suggestion to drag and drop (wassat, in Win Explorer?), then I can't find all the tracks on the playlist to drag them. Yet they're clearly there somewhere as I burned them last night, uncompressed. Reeeeeally odd.
EDIT - Think I've found it!
WMP10, Burn screen, right hand column is headed Audio CD - change it to Data CD! Trying as I type...
Last edited by Brendan Hughes; 24 July 2005 at 12:09 PM.
24 July 2005, 12:18 PM
#11
Sorry, I was under the assumption you were using CD burning software as opposed to music/media software (which, when trying to be user friendly decompesses the music files when you burn to CD - there maybe an option somewhere to stop this, but your guess on where to find it would be better than mine).
I use Nero to do this kind of stuff, but other CD burning software such as Roxio Cd creator or similar all have options to create a data CDs.
edit - looks like you've found it - nice one!
I use Nero to do this kind of stuff, but other CD burning software such as Roxio Cd creator or similar all have options to create a data CDs.
edit - looks like you've found it - nice one!
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