posted on April 23, 2011 03:00
Update! AK4396 not only plays 352.8 files, it also plays 384 Khz sampling rates!
I've upsampled a 192k file to 384K and I get a hiss free playback.
No the interesting thing is that upsampling a 352.8k DXD file (the ones with hiss) to 384k lowers the hiss by roughly a half.
I've researched a bit regarding the DXD files and their recording is quite different than the standard in that they are having a much more shallower anti-alias filter than the downsampled files. That is needed for DSD conversion.
So I believe I am actually hearing some kind of passband noise, or better said it's effects. Now I don't know why this isn't happening when playing these files with the ESS DAC, but there could be three reasons: a) the ess chip does resampling and this affects this noise, b) the digital filters in the ess are working differently, c) a result of the interaction of the first two features
Originally posted by SunRa