I could be wrong..but the power supplies and analog outputs in a player or DAC seem to make the largest impact in the sound. I agree that the jitter reduction does increase the focus of the soundstage. Better analog outputs and power supplies seem to reduce the grain and edginess associated with some players. This also increases the dynamic contrast between softer and louder passages in the music. Blurring is also reduced by a combination of the three IME. Killing as much noise as possible between the power supply and the rest of the unit seems to increase the focus of the soundstage as well.
what is jitter supposed to sound like?
I understand what jitter is from reading books and stuff. however, what kind of sound does it produce? I assume it is different from regular hiss....but I am not sure either.