Refer to diagram at http://static.howstuffworks.com/flash/cd-read.swf
DIAGRAM #2
Question: Why do you listen different sound character and quality from different CD player?
It can be explained in term of “Jitter”.
Refer to diagram (English) at http://www.tnt-audio.com/clinica/jitter1_e.html (Read all 5 parts from Part 1.1 to 1.5)
Refer to diagram (Chinese) at http://www.cndiyclub.com/c_read.php?tid=11782
=> CD transport (Refer to Interface Jitter)
=> DAC (Refer to Sampling Jitter)
DIAGRAM #3
Question: How can CD improve the sound quality?
The answer is not to put CD into a CD demagnetized machine. It is to put all CDs onto the CD stacker and hang it in the wall at the back in which the CD stacker functions as a “Sound diffuse panel”. Then, the sound quality will be improved. As a music hobbyist of mine, please refer to a demonstration of CD stacker at my home as below.