I replaced the SMPS of my Intel NUC with LPSU from Audiophonics.
LPSU100 Stabilized Power supply 19V 5.25A 100W NAS / Intel Nuc - Audiophonics
Who do you mean we?
We can try but human bias works in subconscious level, meaning that we cannot control it like flipping a light switch. That's why external bias control setup is needed in objective listening tests.
Well, I am the one. Am I the only one?
Objective, hmm? How do you define objective listening test.
You may be the only one. But if the survey shows otherwise, then perhaps you aren't. You can find out.
You joined this forum in 2006 (7 months before I did) and still don't know what objective listening test is? 😱
Hmm according to this post by miska ess sabre dac have wandering distortion, maybe CLK division changes the behavior somewhat?
Revolution has 2 oscilators 44/48Mhz and as such on 128fs there is no ASRC (dpll at 0)
I am not seeing any change in IMD , I think thats (above) an issue with heating of the DAC IC (and out board is low temp)
We are trying to implement OSF Enable/Disable ...will update in 1 week (but so far its working still I need to check for SQ)
As you all know China is running a bit slower due to the medical situation , some suppliers are asking for an extra week to deliver the last components for Rev. We expect mass production to start on the 20 of Feb now..
The Xmos code is still being worked on , fonts have increased , more setting are available . You can chose filters , H2/H3 level , Synch/Asynch, and maybe OSF bypass
I am not seeing any change in IMD , I think thats (above) an issue with heating of the DAC IC (and out board is low temp)
We are trying to implement OSF Enable/Disable ...will update in 1 week (but so far its working still I need to check for SQ)
As you all know China is running a bit slower due to the medical situation , some suppliers are asking for an extra week to deliver the last components for Rev. We expect mass production to start on the 20 of Feb now..
The Xmos code is still being worked on , fonts have increased , more setting are available . You can chose filters , H2/H3 level , Synch/Asynch, and maybe OSF bypass
I just finished OSF bypass (enabled) SQ listening first session ...
Revolution will incorporate it. Absolutely yes .
I cannot wait for you gals/guys to listen to it...seems to me that music has reached a level of "no digitalis" that I never heard before .
No volume control on OSF bypass !!!
Revolution will incorporate it. Absolutely yes .
I cannot wait for you gals/guys to listen to it...seems to me that music has reached a level of "no digitalis" that I never heard before .
No volume control on OSF bypass !!!
No OSF adds distortion if no other filter to replace it. However, some people use HQ Player upsampling of CD audio to 384kHz as a substitute OSF filter. Its similar to how Benchmark DAC-3 works, wherein an external filter replaces the one in the dac.
Nope .
OSF disabled reduces noise by 0.150uV (insignificant) but THD gets incredible at -125.5 (so around 1.2db better (significant)
OSF disabled reduces noise by 0.150uV (insignificant) but THD gets incredible at -125.5 (so around 1.2db better (significant)
Yes it would, Nanekiu. However, it may not show up as stationary HD using a fixed frequency FFT measurement method.
Obviously, if it weren't needed for proper dac operation it wouldn't be there in the first place.
Obviously, if it weren't needed for proper dac operation it wouldn't be there in the first place.
Hmm so OSF bypass is something closer to NOS dac with no digital filter but there' still oversampling somewhere else the modulator SDM won't work.
Hi, I got an USBridge Sig with the Santi today. I'm using it with a Chord 2qute with Volumio. I have a lot of cracks, did you experience the same problem? I know there was some issues with mood and DSD but this is happening with all kind of sound, PCM 16/44.1, 96, 192...
Hi Mark
I had a quick discussion on why you hear distortion on OSF bypass.
It turns out that current output increases slightly with OSF bypass and you get clipping at 0dbfs
We take readings with -1db (when OSF is bypassed) since at 0db and 1Khz sine wave , you get -50 THD+N
While music usually does not clip , its possible that on some passages you can hear the clipping clearly...
I had a quick discussion on why you hear distortion on OSF bypass.
It turns out that current output increases slightly with OSF bypass and you get clipping at 0dbfs
We take readings with -1db (when OSF is bypassed) since at 0db and 1Khz sine wave , you get -50 THD+N
While music usually does not clip , its possible that on some passages you can hear the clipping clearly...
One more finding...on 128fs mode OSF bypass does not seem to give advantages on AP machine and I am unable to decide on SQ if its better than just 128FS mode..
On 128fs , I was able to solve the issue with "veiling the sound" by using a diffrent CLK gear . In fact 128fs mode works perfectly fine with 256 and 512fs (page 52 of datasheet)
So problem solved 🙂
I think now that the difference between them is that of preference and amp/speakers.
I removed one of the capacitors before IV stage (pre IV filter) and I could hear another change , for better in SQ , rather subtle . I organized blind test with office people and got around 75 % preference with that cap removed (there is still one more filter pre IV stage)
THD+N did not change .
On 128fs , I was able to solve the issue with "veiling the sound" by using a diffrent CLK gear . In fact 128fs mode works perfectly fine with 256 and 512fs (page 52 of datasheet)
So problem solved 🙂
I think now that the difference between them is that of preference and amp/speakers.
I removed one of the capacitors before IV stage (pre IV filter) and I could hear another change , for better in SQ , rather subtle . I organized blind test with office people and got around 75 % preference with that cap removed (there is still one more filter pre IV stage)
THD+N did not change .