Boosting recording volume

Do you mean "a friend's cd" as in a recording of your friend's music? If so, any increase in volume will just be an artificial increase and the quality will most likely reduce.

You can try importing it into your iTunes library and then in the Info for each song, turn up the volume on each song. This will play them louder in iTunes, but I'm not certain if it will boost the volume when you burn.

To be sure, you can increase the volume in the "info" section of the song and then click on the song you want to increase in volume and then Advanced and then "Create *AAC version", this will make a new file that will be louder. Burn that.


*Where it says "AAC" is defined by what's in the iTunes "Import Settings" preferences. You can change this over to MP3 if you'd like, but for what you're doing, it's probably not necessary.

 

Do you want to re-record or just boost the volume in the actual record?

Because those two are different.

Re-recording is "simpler" if possible, but boosting the volume of an audio file results in quality loss.

Does your friend still have the original mix with all the tracks, where the voice is separate from the music, because that would work better than boosting the volume of a mixed down audio clip?

You can use Garage Band or maybe the software that was used in the first place.

Do you have any more information?