[Andrew Haley]

Audio_Empire wrote:
On Saturday, July 27, 2013 8:59:47 AM UTC-7, Andrew Haley wrote:
Audio_Empire wrote:

In article ,
Andrew Haley wrote:

Audio_Empire wrote:

This is all fine and good, and perhaps you can even hear "some*"
difference, but it still doesn't alter the fact that the Oppo in
question still uses the same SabreDac 32 which converts DSD to LPCM
before playing it,
I don't think so: according to their white paper, they feed the DSD
data into their anti-imaging filter, which runs at a very high
frequency. There's no suggestion that they downsample it to LPCM
first; or do you have some other information?

They use the SabreDAC 32. It converts DSD to LPCM. My information comes
from the Oppo Technical guy.

Hmm. Must be true, then. Under the circumstances, I think I'll go by
the ESS white paper. But even if it does, there's no reason to
suspect that doing so will cause any audible damage.

Thanks for the clarification. I'm going to have to run over to Oppo US
headquarters and talk with their technical guy again (they're about a
mile from here). What you say makes sense and the white paper
certainly points at what you say being correct.

It might just be a matter of terminology. Perhaps there is some
decimation going on. However, DSD runs at 2.8224 MHz and the
SabreDac's anti-imaging filter runs at "up to" 40 MHz, so the obvious
way to do it, if you had compute power to spare, would be to convert
DSD to DSD-wide (i.e. PCM-narrow) and feed it straight into the
filter.

Andrew.