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How to Work With Audio CD .CDA Files
If you view the contents of an audio CD from Windows, you'll see that it contains a number of .CDA files each corresponding to a song track. (CDA stands for Compact Disk Audio)
I regularly get letters from subscribers asking why can't they just copy these files to their PC rather than first having to rip them to .WAV files.
It's a good question with a simple answer: there are no .CDA files on a CD. In fact, from a Windows perspective, there are no "files" at all.
An audio CD differs greatly from your hard drive or floppy disk drive in the way information is stored.
Hard drives and floppy disks store data in concentric rings called tracks. In contrast, audio CDs store data in a continuous spiral starting from the inside of the CD and ending at the outer edge of the CD. Kind of like a vinyl LP in reverse.
The format of the data stored on CDs is also quite different; it's a continuous stream of raw digital data rather than individual files.
So what are .CDA files that you see on an audio CD?
These files are created by the Windows CD driver. They are simply representations of the CD audio tracks and are not actually on the CD.
Each .CDA file is a kind of a pointer to the location of a specific track on the CD and contains no musical information. CDA files are all 44 bytes in length and each contain track times plus a special Windows shortcut that allows users to access the specific audio tracks.
So if .CDA files contain no musical information, what happens if you "copy" a .CDA from an audio CD to your hard drive and then double click it?
If the CD is still in the drive then the corresponding track will play from the CD. If you remove the CD you will get an error message. That's because the .CDA file contain no music, it only points to where the music is located on the CD.
To work with audio files on your CD you need first to convert them to .WAV, .MP3 or another file format that computers understand. That's what a CD ripper does and that's why you must use a ripper before you can work with your audio files. Simple as that.
Gizmo
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Comments
i have a new reformatted laptop into windows 7.i have an mp3 file burn in cd,when i inserted the cd in the dvd rom the files cant be read.what should i do to make it read?
from
rasher
Please post this in our forum if you require assistance.
sir, please told me how we burn audio cd (cda) by computer cambo drive or how we convert mp3 or other songs into audio or cda songs
Sorry but we do not provide individual support here in the comments. Please post your query in our forum.
Hi guys. I have a question. A long time ago when I did not know much about computers I copied a bunch of CDA files to my computer as backup, and the CD that they came from got stolen and I have no clue what the names and artists of these tracks are, in fact I cant even play them. Is there a way to hack into a CDA file to extract the song titles that may be in these files, or are this info not on them?
Thx so much :)
There is no such information in the .cda files.
Ok, fellow nurds, I bought a CD, ripped it, chose a few tracks which I liked, now!!! how to burn it back as .cda to play it in my car from mp3.???
Any ideas?
You need to burn those songs onto an audio cd, or mp3 cd. See here for software which provide such option.
http://www.techsupportalert.com/best-free-cd-dvd-burning-software.htm
Does anyone know if it is possible to reduce the size of a .cda file? I know it isn't the actual audio file on the CD but only a pointer to the actual raw file; however, what I am trying to do is place MORE music on a CD. Is there anyway to compres the raw file? I need to put about 15% more music on the CD. HELP!???!??!??!!????
Thanks!
You can easily solve this problem without compromising quality! Buy mor expensive 800MB or even 900MB,and you will have 90min & 100min of music respectively, only that the latter is harder to find.
I hope this satisfies your needs.
Regards,
Frank
Not that i'm aware of. As far as i know the only way to achieve this is by converting the audio files to another type such as mp3. Alternatively you could use a DVD instead of a CD....depends what you intend to use for playback.
Thanks alot the Ripper worked
This is absolutely insane! It's the year 2010 and Windows can't see the native audio files on an audio CD?!?
I was just trying to help a long distance client with an audio file on a CD someone sent her. I told her to drag the audio file to her desktop and send it to me. She sent me a "cda" file. Out of curiosity I went to Fileext.com to see what a cda file was and it told me it was a shortcut to the actual audio file. So I replied to her this was not it, and that I needed the "real" audio file. She said there was nothing else. I knew she was using Windows.
So I grabbed an audio CD and looked at it on my Mac and all the native AIFF audio files were there as has always been the case. I've dragged these to the desktop on many occasions to do whatever with.
So I booted into MS Windows on my Mac and looked at the CD from there, sure enough, just cda files. I tried everything to find the real audio files. After being stumped, I came online and found this article. Absolutely amazing, I couldn't believe what I was reading.
Take your troublesome CD to a Mac and see what you've been missing. Shaking head.
That's interesting Lantz.
If you boot into a Linux system such as Ubuntu, you don't see .cda files from an audio CD either, but a list of files such as Track 1.wav, Track 2.wav,... presented by the default file manager. Each file is about 30-40 MB in wav format and you can copy it to your hard disk with the file manager for play back after removing the CD. No separate ripping is necessary as in the Windows system, which seems to have mystified some users by generating .cda files to point to the raw digital data in an audio CD.
See also Audio CDs, WAV and AIFF, all three using uncompressed pulse-code modulation (PCM) encoding by standard.
I once copied some music files from a cd into my hard drive. i could play them for some time. recently, i loaded ubuntu 10.10 as second operating system. and when i try to play them some of them are not playing. these have extension .cda. this is so whether i see them in win7 prof or in ubuntu. how can i restore them to music files. i don't have the cds as i came to another country after that.
The files cannot be restored, because .cda files are just pointer to the original files, and nothing else. The original files are still there on the CD, and without the CD, the .cda files are useless, as they are nothing more than shortcuts.
Previously i used to make audio cd from mp3 files stored on my hard disk.Now when using various software to make audio cd. it only burn cda files on the cd with 44kb.
Please help to get back to normal audio cd, that can be played on any cd player.
Is it a problem in the settings of the dvd writer.
Thanks
Please tell us the exact steps you are taking to prepare the audio CD. Also, please mention what program are you using to create the CD. That will help us in solving your problem.
I use nero 7 , upon inserting a blank cd, i got the pop up to burn cd.Then i choose the option make audio cd. it then prompt me to select the files on my hard disk. then i click on the button next, then the option burn. After it burn the audio cd, i verify it on a cd player unfortunately it says wrong format. Then when checking the cd on my pc , i saw it burn only cda files.
Thanks for your help.
An audio CD will show .cda files, which are tracks information for the underlying mp3 files. Although the songs will be there internally, yet the files will be shown as cda. The steps you are taking are correct, and the CD should play. I cannot think of any problem with the steps. I hope you are using mp3 files for the audio CD. I think Nero accepts mp3 and wav formats for audio CD, but I am not sure as I dont use Nero.
Yeah i use mp3 format, but still i get the same problem, although i use different softwares. Should i convert the mp3 files in wave format before burning the audio cd.
Or might it be a problem with the dvd writer.
Thanks
I don't think it should be a problem with the DVD writer. Does the CD play on your computer? You can use a CD ripper like Audiograbber to rip the CD and see if it can extract the mp3 files out. This will tell if the mp3 files did get written to the CD at all.
Which other software have you used? I haven't made an audio CD before, so I don't know much about it, although I do have knowledge of CD burning.
If the burning software supports mp3 files(which it should), then I dont think you need to convert to wav files.
Other thing you can try is to make the CD as a data CD, but that will involve numbering the mp3 folders as well as the files inside the folders sequentially. That's a cumbersome task. I have used this method in the past to play CDs, and it worked.
I agree with Anupam that the steps you took are correct. Personally I use Windows Media Player to burn MP3 to CDs, so far it works well for me.
There're quite a number of factors which can result in a burned audio CD that can't playback well on a CD player, such as whether the burning is 'finalized', the player supports both pressed CDs and burned CDs (CD R/RW), the quality of CDs and/or many other reasons.
More tips here: CD BURNING TIPS: How to avoid making coasters...
Actually the CD's work fine in the Computer they were created on, (pretty stupid) but they will not work in my Car's CD player (2002 Cad. Deville stock)
So, I need CD's that will work on ANY CD player not just windows CD players.
I copy the track from a cd and paste on my flash drive. There a program that i can used to convert these cda track from my flash drive to mp3 or wav?
Please note the cda track is not on a cd, its on a flash drive.
Thanks
Sarah
A good place to look would be Best Free Audio / Video Format Conversion Program
Arithmomaniac wrote a great review for this.
Edit: you will need the cd in order to get the audio to convert to mp3 however, .cda as many commenters and the review have said are simply shortcuts to audio on the cd.
Hey thankyou very much your advise really work
i accidently copied the song to my document directly using copy paste without ripping it and unfortunately my sister broke the cd accidently . now i cant open the file what can i do to open it .pleeese help me
Nothing can't be done now, I think. When you copied the song directly, only the .cda file must have been copied, which does not contain the actual song, but only data about it.
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by Anonymous on Fri, 05/22/2009 - 04:22 (#22113)
This is a superb example of clear writing. The author takes a complex technical subject and presents it in manner that everyone can understand yet manages to be engaging at the same time. I just wish my Computer Science students could write like this.
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Indeed. But Gizmo is one of the best examples of this type of technical writer. It's something you can aspire to but cannot, I think, be taught. A Gizmo or a Jonathan Raban is born, not made.
I don't apologise for mentioning the two in the same sentence because writing talent comes in many forms, and clear writing or wonderful description may be different styles but the end result is the same: a perfect experience for the reader.
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