Hi all,

I have news. I've just low passed one of the DXD files I was having troubles with and guess what, no noise/hiss anymore!

So I guess my little theory was right, what I am hearing is the effect of passband noise due to the shape of the low pass filter used in DXD files.

No I bet the reason the Buffalo DAC is not troubled is because it has some low pass filters somewhere in there.

For example AK4396 also has a digital filter, only that it is -6db at 96Khz for a sampling rate of 96Khz. And that is for the "sharp" roll-off setting

The filter I applied in Audacity was 20,000 Hz, 24db. Unfortunately that is not practical, I need to experiment with values higher than this, however for the purpose of experimentation it worked great.

I will try to load the dxd files and the 352.8k "clean" files I have in a visualization software to see if I can further confirm the noise content idea.

Originally posted by SunRa on diyAudio.com