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Why does Denon 3910 default to PCM for sacds?

I have been made aware of this by Alex Peychev. He states, "Anyway, the 3910 Source Direct ON/OFF mode is in the On-Screen menu in the Audio Settings. You need a monitor. When you select Source Direct ON you have true DSD. If it's OFF the DSD is converted to 176.4/24 PCM. Be aware that the Factory Default is Source Direct OFF, so the machine converts DSD to PCM. You need to go and change that." I have tried it both ways and it makes a substantial difference in the realism of the sound.

I suspect that Denon's indifference to sacd and the desire to hear sacds in dsd conversion is overridden by their expectation that most will be interested in only dvds and HT.
tbg
tbg OP
5,263 posts
 
Tvad, I think that setting Source Direct ON you have true DSD for sacds and pcm for everything else, but I think this may have implications to MCh bass management. I don't think it affects how stereo cds, hdcds, dads, or dvdas sound.

Rudd, I at least know nothing about using the Denon as a transport. I would assume that the digital out can only be PCM and probably only 44 MHz.
larry_s
128 posts
 
To add to what Rex said. How many HTs have 5 full range speakers that are equidistant from the listening position? Defaulting "source direct" to "off" makes a lot of sense.
tbg OP
5,263 posts
 
Again for those using the Denon 3910 as a stereo source, I can now confidently state that when you make the change of Source Direct to ON means that you have to wait again for break-in. I guess this is the dsd dac. After better than a week in the new setting, I am now just overwhelmed by the need to make this change. Never have I had sound like I have now. I should also say that your results may vary if you are not using the Exemplar 3910.
Post removed 
aplhifi
515 posts
 
Tbg, yes, you will need to break in the DSD part of the DACs and other components on the DSD signal path. The Denon 3910 DACs feature Burr-Brown's best DSD to Analog conversion technology as seen in their DSD only top line DSD1700 DAC.

The other thing Denon 3910 users should know is that, if you are listening to 192/24 DVD-A and you do not have the Denon in Pure Direct "All OFF" mode, you are getting 96/24. In order to get real 192/24, please turn the Pure Direct to "All OFF". This will also give you much better audio quality with all formats.

Regards,
Alex
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