In article dJ2dc.92443$w54.550851@attbi_s01,
wrote:

You know , whether sound quality is better is debatable, but burning slower
IS much better as far as producing a more "error free" copy. High speed
copies will sometimes cause dropped bits and generate bit errors, which can
result in skipping or mistracking by the read laser in your home or car cd
player. This can be either software or harware related, and it does happen.
Maybe im nuts, but I do hear a difference between copies of cds made on my
pc (at any speed) , and those made on my Harman Kardon home deck. PC copies
seem harsher, with more distortion, and when played back on good front end
equipment, such as the Theta Voyager, you can hear the difference. Can
anyone explain why ?, my friends say its nonsense, "its a bit to bit copy",
they say.
But in your case, if your just burning for the car, or portable use only,
try burning a lil slower and get an error free copy. Sonically it will sound
fine.

1) Make a "slow" CD of something. Make a "fast" CD *from the slow CD*.

or

1a) Make a H-K copy of something, then make a PC copy of the HK CD.

2) Read in corresponding data from both, to your PC. Do a bit-by-bit
compare. Any difference?

Isaac