Try burning the CD-R's at a faster speed.
"slow" isn't always best.
attempting to burn T-Y CD-R's on my NEC DVD+RW drive
at the slowest speed my software will allow results in semi-playable
mp3-CDs with VISIBLE burned spots.
with most burning software you are usually given a choice of burning speeds, just like you NEVER shoose the fastest speed never choose the slowest speed either.
Try that FIRST before you burn much brain sweat worrying about it.
I've seen several issues with burning discs and playback quality if the files that are being burned to the disc are on a drive that is "fragmented"
So while I personally do all my playing from my F drive my G drive
is the source for any burning.
the files on my G drive went on in alphabetical order and numerical order in a single "clean" write to an already established directory structure.
For some reason burns from that drive never have playback issues.