Listening to a .cda file without the CD

OK, I’m afraid my question is awfully dumb but… fighting ignorance and all that.

A few months ago a coworker lent me a CD that contained audio files which I needed for a presentation. I made a copy of the tracks I needed to make sure that I had a backup but for some reason didn’t extract them. I basically just copied and pasted the file. I used the CD during the presentation then gave it back to my coworker. Now, all that I have left is the .cda files that I copied.

Is there a way to listen to them or do I have to ask for the CD again in order to do that?

You need the CD:

http://www.techsupportalert.com/how_to_work_with_audio_cd_cda_files.htm

in the future, you need to use a program to extract (“rip”) the tracks to .wav, .mp3, or whatever format you want.

Or just copy the entire disk (a disk copy, not a track copy). Commercial music CDs don’t have any copy protection, and if it was a home-made original, it’s unlikely to have any, either.

Thanks for your answers.

I’ve asked my coworker whether she can lend me the CD again. If it’s not possible, I still have the transcript and I can work with that. I’ll be more careful next time, though.