Originally Posted by dschamis
Don't know - what is standard SACD?
SACD uses an entirely different scheme to sample and encode audio than PCM - called DSD. The sampling frequency is 2.8 MHz - but that doesn't mean it's 64 times as good as a CD!
The two encoding schemes are difficult to compare since they are so different. There has been a lot of debate about DSD vs. PCM.
At this point, if DSD/SACD sounds better than many CDs, it is unclear whether it is because of better D/A conversion processes, superiority of effective bit-depth (CD-Audio 16 bits is IMHO insufficient for high-end audio), or many other variables.
In conclusion, you really can't say SACD = specific sampling rate because that doesn't apply in the same way as with PCM.