If you were to log in, you'd be able to get more information on your fellow community member.
The 16 bit linear quantization used to produce CDs does more adversely affect the signal to quantization noise ratio when the signal is small becuase the quantization noise is constant in a linear system.
u-Law and A-Law companding was used by the phone companies worldwide to squeeze more performance out of an 8 bit PCM system. Your criticism of the audio CD format is valid.
However, don't we see logrithmically, too? Couldn't the same criticism be leveled against video card, scanner, and digital camera manufactures? I would guess that a logrithmic system would produce, for example, less shadow noise, in a scanner.