Sound quality degrades after 6 months
 

I have burnt lots of back up music cd's to us in my car, but now after about 6 months some of them sound terrible all of a sudden, with lots of crackle and hiss with the music. Why? They are all low cost, about 20p to 25p each sold on spindles, with no manufacturers name, and I have put full face labels on them all, so what is wrong? cheap disks? label glue reacting or what?
Answers please!!
JBMouse

Most likely the quality of these "low cost" CD-R's is plain bad... If there are too many errors on the CD-R the error correction can not fix this anymore and this results in crappy sound.

If you are also using these CD-R's for data then you get too see errors much faster than on Audio CD's

look here (a bit outdated but still valid):

http://cdmediaworld.com/cd_quality.htm