or Connect
Head-Fi.org › Forums › Equipment Forums › Dedicated Source Components › Thoughts on a bunch of DACs (and why delta-sigma kinda sucks, just to get you to think about stuff)
New Posts  All Forums:Forum Nav:

Thoughts on a bunch of DACs (and why delta-sigma kinda sucks, just to get you to think about stuff) - Page 41  

post #601 of 6360

Hi Purrin,

 

thanks for the great informative comparisons! I am still not sure about the Offramp 5 for my A-Gd M7 but the temptation is very strong :)

 

Have you compared the direct USB connection of the M7 (with the latest drivers and firmware 2014V2) and the Off5>I2S>M7?

What cable do you use for the i2S connection Off5>M7?

 

Many thanks in advance!

post #602 of 6360
Thread Starter 

I did try the USB with the latest firmware - go through the thread to find it.

 

I use a custom made short CAT6.

 

What would be interesting would be to try other cheap converters like the M2Tech (the OR5 is based on that one, but heavily tweaked with a bunch of boutique parts, separate clock boards, power regulators, etc.) to see if there's an improvement over the stock USB.

post #603 of 6360

Thanks, I will make my CAT6 as well.

 

One experience with the cheap USB converters:

Some time ago, I tried the first version of hiFace versus the Audio-GD DI-V3 > BNC > A-GD Reference One and preferred the DI-V3 with old drivers and firmware.

post #604 of 6360
Thread Starter 

Yup just too many variables, not to mention the effects of these converters could be different on different DACs.

post #605 of 6360
Quote:
Originally Posted by purrin View Post
 

This is all conjecture, but the part that scares me about DSD / 1-bit / delta-sigma is the ultrasonic noise / quantization error which is produced and the noise shaping techniques used to move this noise outside the audio band. I do seriously wonder if why such DACs, i.e. especially SABRE, sound they way they do because of this. Maybe Paul is on to something with the 10x DSD, the FPGA, and associated custom filters. I mean, quite a few others and I did at least get different results when converting PCM to DSD via JRMC in real-time to DSD DACs.

 

Then I start to think about Mike Moffatt @ Schiit saying stuff about DSD being inherently inaccurate and not suitable to diagnosing diseases (leaving sick people to die) or guiding missiles (killing people which we did not intend to kill.)

What was PS Audio's stance on DSD before they were trying to sell you a DSD DAC?  Schiit's position on DSD was don't bother, before and after they started selling a DSD DAC.  I tend to trust the Schiit guys, as they don't seem prone to bullschiit.

 

Of course, I know next to nothing about the tech behind these.  I work at Analog Devices, but I only do the email. :)

post #606 of 6360
I just hope there is some truth in PSA's claims as I've always thought PCM sounded broken.
post #607 of 6360
Quote:
Originally Posted by REXNFX View Post

I just hope there is some truth in PSA's claims as I've always thought PCM sounded broken.

 

That's funny because most recordings today have been converted to and from PCM at some point. 

post #608 of 6360
Quote:
Originally Posted by Greed View Post
 

 

That's funny because most recordings today have been converted to and from PCM at some point. 

From what I read and understand from PSA's statement,

http://www.psaudio.com/wp-content/uploads/2014/02/PS-Audio-DirectStream.pdf

They didn't say PCM is bad,   they agree PCM 44.1k is good,   but how Delta-Sigma DAC chips playback PCM is wrong, those chips makes PCM sounds leveled, and lost details.

Their chip (FPGA) converts PCM to DSD 10x internally, then playback DSD using 1bit delta sigma.      And they claim the end result is, PCM becomes fully smooth, and full of details.

 

I don't know that's possible or not.   But hope they can make it, adding a new fun toy to the world.

post #609 of 6360

Interesting.  I wonder how the architecture of the new PS Audio dac willl ultimately stack up against the forthcoming John Swenson/Bottlehead FPGA based dac.   

post #610 of 6360
Quote:
Originally Posted by skeptic View Post
 

Interesting.  I wonder how the architecture of the new PS Audio dac willl ultimately stack up against the forthcoming John Swenson/Bottlehead FPGA based dac.   

Thanks for reminding me to put that on my watchlist :wink_face:

post #611 of 6360

so much for ps audio and chocolate ice cream. dang son,10x? I think I know what I am looking forward to. face it dsd is the fotm for now. I love it too. you know you can do this stuff with software. a modern pc can crunch much more numbers than these dacs. of course there is something to be said about dedicated hardware. I am kicking myself deciding if the msb's pcm sounds better than the modded teacs dsd. it just can't be. first of all it is class "s". second of all the msb is 65x the teacs price. I already decided the teac is better than the msb on dsd. I have to go shoot myself in the foot. I am not being an idiot. I just think dsd is the killer app. you have to try ben and jerrys to really decide haha. seriously I want to see a no holds barred dsd only dac. the ps audio may very well be just that. of course the nad is doing 35 bit pwm. choices,choices. I said before, when sacd came out I was blown away. the thing with the modded teac is it sounds like a digital turntable. I will probably go nuts on the ps audio when I get it. I mod everything of theirs you guys should hear my gcha. it is my fav headamp hands down. I feel all these arguments dsd is old hat are null. so is redbook and sacd is newer than that! I wonder what dac is best at dsd right now but I will probably wait for the ps audio.

 

purrin, am I correct that you don't hate dsd as much anymore? you just have to embrace it. it is like when gps came out. for a year I thought maps were still where it was at.

post #612 of 6360
Maybe look into the Lampi DSD DAC? I haven't heard it but some folks have become raving lunatics post listen.
post #613 of 6360

that is about as analog as a dac can get. only into solid state though. still, that's not a bad idea.

post #614 of 6360
Quote:
30-year PCM cover-up

rolleyes.gif
post #615 of 6360
Quote:
Originally Posted by gevorg View Post


rolleyes.gif

This.

 

Marketing hype.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Dedicated Source Components
This thread is locked  
Head-Fi.org › Forums › Equipment Forums › Dedicated Source Components › Thoughts on a bunch of DACs (and why delta-sigma kinda sucks, just to get you to think about stuff)