Which DACs bypass digital filtering?

[bilboda]

Add the Singxer SDA 2 (2 C) for DSD. It it even mentions in the manual that it is intended to be compatible with HQPlayer. I use it and like it quite a bit.

[bilboda]

Sonnet Digital Audio Morpheus up to 384k. Who needs DSD with a dac like this?

[bilboda]

I play DSD, downsampled to pcm with HQplayer....sounds better than the upsampling to DSD and native DSD that I had going on before. The dac just outresolves the AKM4497 based dac I used for upsampling.

 

[bilboda]

apparently not

[bilboda]

lol, I dunno, not sure I value your doubt over the designers pedigree...and I am not sure that measurements at this extremely inaudible level will tell you how it sounds either...asr aficionado?

 

[bilboda]

We could go way off topic, dark matter?, fancy cables, optical network? No measurements there either, I'm sure, and who are u to say what's impossible? Suffice it to say that his dac meets  op's requirements and I think it's terrific.

[bilboda]

This dac splits the bits in 2, 12 bits going to 1 set of ladders 12 bits to the other. The least bits are raised up to avoid thermal noise, afterwards they are recombined with a logarithm in use to get 24 bits. Read the info for your self and draw you own conclusions. It's beyond me. I can understand the presentation but can't evaluate it, This technology was established at Metrum by Cees and improved on with the new design. I don't think he'd use a method that wasn't sound and didn't sound good too.

 

[bilboda]

6 hours ago, opus101 said:

Quite likely they know nothing of FFT gain so they just read that figure off their FFT. It would equate to the noise in a rather narrow bandwidth, perhaps <1Hz. But without knowing parameters of the FFT (number of bins, windowing) its relatively a meaningless number.

I think it's safe to assume that I know nothing of FFT gain and that you know nothing of how the designer is handling it (or not) but I don't think it is safe to assume that the designer knows nothing of FFT gain after decades of work with dacs. A simple search finds a dozen well documented examples of the concept. Not really a foreign concept to someone who works in that field.

 

[bilboda]

Showing the depth of your knowledge does nothing to explain or expose the depth of the designer's knowledge.. So probably better just to ask him unless you prefer pot shots in the dark.

 

[bilboda]

Well, I view your statement as unsupported, likely submitted for controversy only and thus false,until proven otherwise.🤨

[bilboda]

He is apparently aware of the noise issue and has addressed this. What do you think of the solution? I have only read a claim of 24 bit range. 26 bit is being inferred by the reader?

[bilboda]

"The result of this process is an extremely high linearity, right down to -140 dB, which gives our products a realistic 24 bit dynamic range."  

https://www.sonnet-audio.com/Morpheus.html

 

[bilboda]

143? 150? not very different and I suspect the spec was measured not calculated. You can speculate all you want but until you know how it was measured and duplicate it, (or correct it) you can't know. So if you do want to know, you should ask.

[bilboda]

I guess speculation is the order of the day then as no one really wants to know, I have to turn to the right and get back to work, y'all have a great Valentine's/Friday.