marktjp

DAC is important, but does the digital source matter?

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Super Dealer
8 minutes ago, marktjp said:

Hi Keith,

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

Yes.

Keith

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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...?


It doesn’t - that’s the point! If it was a CD transport you were asking about, then my answer would have been different.
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Super Dealer
3 minutes ago, BeeRay said:

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

Do Chord state their DACs are susceptible to R/F or just cable manufacturers?

Keith

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Just now, PuritéAudio said:

Yes.

Keith

Ok cool, I think I have all the answers I need, thanks Keith. I'm glad not everyone here is taking advantage of my thread to make some personal point, like I just did... Cheers.

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Super Wammer
6 minutes ago, marktjp said:

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.

Yes, optical only transmits the digital signal and cannot transmit RF noise because it is not a conductor. 

Unfortunately you will find that there are the two camps. One camp refuses to even entertain that the problem might exist or will dismiss it by saying that only poorly designed DACs cannot filter the RF noise (something that is never justified). 

The other camp (my point of view) is that we have heard the effects of RF noise with various DACs and it is not nice. 

If it is difficult to arrange to trial different sources or if you are happy with your sound anyway then it is not worth getting excited about but if you were thinking of changing digital sources then it would be worth at least listening to a few yourself so you could make your own mind up whether they sound different or not. 

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Super Dealer

Without wishing to doubt you can you post the link.

Keith

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Moderator
16 minutes ago, marktjp said:

Thanks Fourlegs

Mark - you should bear in mind that Fourlegs sells terribly expensive digital interconnects on the basis that they filter out RF. So, he has a vested interest in cable-borne RF actually being a problem for a DAC.

Just sayin... 

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Super Wammer
2 minutes ago, Tony_J said:

Mark - you should bear in mind that Fourlegs sells terribly expensive digital interconnects on the basis that they filter out RF. So, he has a vested interest in cable-borne RF actually being a problem for a DAC.

Just sayin... 

As you have mentioned it, yes I do but I have never knowingly sold any to a wammer and my purpose in this and other threads is just to have a discourse. Note that I suggest optical cables as a solution and not mine.

Also, many highly respected digital server manufacturers are at pains to address the  RF noise problem which tends to add weight to what I am saying. 

Whilst we are in the subject, I reject the ‘terribly expensive’ derogatory comment. I bet many people spend far more on their other cables. 

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Moderator
44 minutes ago, PuritéAudio said:

Do Chord state their DACs are susceptible to R/F or just cable manufacturers?

Keith

Chord DACs are definitely susceptible to cable manufacturers...:rofl:

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I think it might be all summed up in this song 

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Super Wammer
5 minutes ago, Tony_J said:

Chord DACs are definitely susceptible to cable manufacturers...:rofl:

You’re so funny. You and Kiethy should be a double act. That didn’t take long for the two of you to destroy a perfectly interesting discussion. 

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Super Wammer
47 minutes ago, PuritéAudio said:

Without wishing to doubt you can you post the link.

Keith

BeeRay may know where to find a link, but I too recall them stating something along the lines that one of their newer models improved its rejection or susceptibility to RF or noise of some sort.  I suspect it will be in a YouTube presentation or on whatever  the forum it is that Rob Watts frequents - is it computer audio something, or one specialising in headphones?

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Super Wammer

But although Chord have been picked out in an attempt to divert the general discussion I have not heard that they are particularly worse than other DACs. I say again that if there was nothing in it then digital server designers would not be giving rf noise attenuation the amount of attention that they are in their designs.

i have mentioned before that the Innuos Statement demonstration at shows comparing it to their Zenith SE is a particularly compelling demonstration of the differences in sound despite all the ones and noughts being the same. 

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Super Dealer

You know how I feel regarding ignited comparisons.

Keith

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