Kegworth Show Information

The information for this year's show is now live at www.thehifishow.com or by clicking on the show banner below.

NON EXHIBITOR ROOMS NOW OPEN - Special Offer....Stay Saturday, join in all the build up excitement on Sat night and then gain FREE access to the show on Sunday

ONLY 4 EXHIBITOR ROOMS LEFT - BIG SYSTEM SPACES SOLD OUT - ONLY 2 NON EXHIBITOR ROOMS LEFT

marktjp

DAC is important, but does the digital source matter?

Recommended Posts

Hello all,

I want to get a better DAC to convert the USB digital signal from my Nvidia Shield Android TV box to an analogue signal for my Roksan Ceres amp and B&W speakers.

SO

Does it matter (at all) where the zeros and ones come from. My thinking is it does not matter at all, and it is the conversion of those bits of information into analogue which is the crux of the matter, right?

If that's not correct, please explain, I know I'm able to output up to 32-bit, 192kHz using KODI on the Android box. see here https://nvidia.custhelp.com/app/answers/detail/a_id/4410/~/how-do-i-play-high-resolution-audio-on-my-shield-tv%3F  and it's just a bunch of 000 and 111s... so surely the info is either there, or not?

Thanks!

Mark.

Share this post


Link to post
Share on other sites
Moderator
2 minutes ago, marktjp said:

Does it matter (at all) where the zeros and ones come from.

No.

  • Like 1
  • Upvote 1

Share this post


Link to post
Share on other sites
3 minutes ago, Tony_J said:

No.

Is that a stirring spoon I see in your hand?

  • Haha 2

Share this post


Link to post
Share on other sites
Moderator
Just now, wHIZZY said:

Is that a stirring spoon I see in your hand?

No.

  • Haha 1

Share this post


Link to post
Share on other sites

If the source is a TV box, then I wouldn’t worry.

  • Like 1

Share this post


Link to post
Share on other sites

Beobloke,

I am not sure what you mean. How does it matter whether the source is an Android TV box or a Samsung Phone or a 20k audio streaming server...?

Share this post


Link to post
Share on other sites
Super Wammer

Tony_J is just a grump when it comes to digital stuff.

My view, and many others, is that the ones and noughts are still the same whatever the source but that different sources can 'infect' the digital signal with RF noise from power supplies and elsewhere and which can then get into the analogue stages of the DAC and cause extra brightness and other artifacts. A simple way of breaking this noise chain is by using an optical connection however be aware that the noise can still get transferred via power cables in some systems.

Listen and decide yourself though is the best way to decide if you hear a difference. Generally a less bright sound is better as it indicates lower RF noise.

Obviously the usual YMMV and IMO applies . . . . .

  • Upvote 1

Share this post


Link to post
Share on other sites
Moderator
2 minutes ago, Fourlegs said:

Tony_J is just a grump when it comes to digital stuff.

And what exactly do you mean by that?

Share this post


Link to post
Share on other sites
Super Dealer
2 minutes ago, Fourlegs said:

Tony_J is just a grump when it comes to digital stuff.

My view, and many others, is that the ones and noughts are still the same whatever the source but that different sources can 'infect' the digital signal with RF noise from power supplies and elsewhere and which can then get into the analogue stages of the DAC and cause extra brightness and other artifacts. A simple way of breaking this noise chain is by using an optical connection however be aware that the noise can still get transferred via power cables in some systems.

Listen and decide yourself though is the best way to decide if you hear a difference. Generally a less bright sound is better as it indicates lower RF noise.

Obviously the usual YMMV and IMO applies . . . . .

This could happen but only if your dac is really, really poorly designed.

Keith

  • Upvote 1

Share this post


Link to post
Share on other sites

Here we go again...

  • Haha 4

Share this post


Link to post
Share on other sites
29 minutes ago, Fourlegs said:

Tony_J is just a grump when it comes to digital stuff.

My view, and many others, is that the ones and noughts are still the same whatever the source but that different sources can 'infect' the digital signal with RF noise from power supplies and elsewhere and which can then get into the analogue stages of the DAC and cause extra brightness and other artifacts. A simple way of breaking this noise chain is by using an optical connection however be aware that the noise can still get transferred via power cables in some systems.

Listen and decide yourself though is the best way to decide if you hear a difference. Generally a less bright sound is better as it indicates lower RF noise.

Obviously the usual YMMV and IMO applies . . . . .

Thanks Fourlegs, 

So and optical cable is less susceptible to RF noise than a USB... ok. I am not sure yet what bitrate/frequency the Nvidia Shield Android TV box can output via optical. I don't have many HD audio sources anyway at the moment. It would be great to be able to live switch between Optical vs USB but I doubt the Nvidia can churn both out simultaneously, and I also don't know if most DAC's allow you to live switch either. I find comparisons i've made that take a few minutes to switch between gear to be VERY inconsistent.

Edited by marktjp

Share this post


Link to post
Share on other sites
28 minutes ago, PuritéAudio said:

This could happen but only if your dac is really, really poorly designed.

Keith

Hi Keith,

So would a good DAC filter out any RF noise coming in from a USB cable?

Share this post


Link to post
Share on other sites
Moderator

:pop: 

This is shaping up into yet another bullshill thread, but have no fear, as the bin is huge and the holiday hammer polished.:D

  • Haha 5
  • Upvote 1

Share this post


Link to post
Share on other sites
30 minutes ago, PuritéAudio said:

This could happen but only if your dac is really, really poorly designed.

Keith

But Chord Qutest DAC is one of the best measuring according to that site you use.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.