Do I need an expensive digital cable?

This is all very interesting, folks.

To complicate matters further, most SACD transports do not export native DSD to a DAC due to imbecilic copyright protections that exclusively inconvenience honest users. In practice, SACD transports only output  DSD natively to DACs of the same brand through a secure proprietary interface, essentially making the transport + DAC the equivalent of a SACD player.

Otherwise, sadly, your SACD transport downconverts your DSD signal to PCM before sending it to your DAC. Manufacturers seldom brag about this, or any up / downsampling or format conversions done in the digital domain for that matter. What audiophiles don’t know can’t hurt them.

The idea is to make it too difficult for non-expert users to capture (and, presumably, pilfer) the DSD stream.

Now, Accuphase’s acclaimed duet of DP-1000 transport ($24,975) and DC-1000 DAC ($24,975) plays SACD end-to-end. No shenanigans there; you get exactly what you thought you were getting.

Accuphase makes amazing gear, but it is not inexpensive. A more down-to-earth alternative is PRC-made gear. DRM? What’s DRM? HAHAHA THOSE SILLY AMERICANS!!!

That’s how it goes with 2-channel audio. DSD over HDMI is a different ball of wax.

@audio-b-dog 

I can't help you choose between streaming services!

But for classical, I highly recommend Presto Classical's streaming service, because they really understand the structure of classical pieces, and their recommendations come with multiple reviews and downloadable booklets.

There are far too many variables in streaming (see earlier post), so it is no surprise to me that CD often sounds better.

If you want to compare DSD and PCM, silver disks are the go.  For less than the price of a cable, buy this Album: DIVERTIMENTI (2L-050-SABD) or this Reflections - Works by Britten, Stravinsky & Vaughan Williams 2L 2L125SABD [DBi] Classical Music Reviews: March 2017 - MusicWeb-International

You get 9 different deliveries of the same recording!

@devinplombier 

DSD on HDMI is a different ball of wax

Absolutely no problem mixing and matching with HDMI, in my experience. Sony and Reavon transports work seamlessly with Marantz receivers and AV pre-processor.  Both ends show exactly what they are outputting and receiving, including native DSD. 

But why use a purpose built high-speed digital interconnect when you can bastardise 3 wires from the same cable for I2S?  HDMI licence fees, perhaps?

@richardbrand 

So, the bottom-line question I have for you is how you use all of the information you know about networking in your day-to-day life as an audiophile. I began this forum by asking if I should buy a "better" coax digital cable. I listened to opinions from all sides, and I decided to give it a try. And the cable has improved my system.

When you criticized my networking knowledge you made a joke about my "golden ear." Yet my golden ear has been my touchstone in almost every decision I have made as an audiophile. I could give you many examples that I'm sure are unnecessary.

How has your technical networking knowledge helped you make decisions as an audiophile? It would be helpful to the rest of us if you could pass along some real-world choices you have made using this knowledge, so that we might be able to use your networking knowledge to our benefit.

@audio-b-dog 

This discussion brings me back to when I was selling computers at Hewlett Packard to the Navy and Air Force. I would ask a support person a question and she would go on a bit longer than I expected, or could explain to the customer.Support people wondered why sales people were so stupid and sales people wondered why we were needed to boil down explanations for the customer

I can relate to this!  As a techo, I cut my teeth on arguably the world’s first PC, the Olivetti 101. I slowly worked my way until I had the grand title of Principle Systems Engineer with Australia’s biggest company.

Then I moved to a computer company, where I was the support guy doing all the work in presentations while the sales guy got all the money.  So I swapped hats and became the sales guy.  Initially I had absolutely no idea what I was doing, but fortunately I was poached by another computer company.  Relatively quickly, people realised I was a sales guy that did know what he was talking about.  I got the best accounts!

The most help I got was another sales guy who lent me a book on negotiating, which emphasied that you had to know the other guy’s timeframe.

Timing, in sales at least, is everything.  Which is a segway to your question about timing in the digital playback world. Personally I think it is a bit of a furphy (Australian slang for an army water wagon round which tall stories were told) but I know I’ll be shouted down.

You can go out of your way to cause timing issues, for example by using I2S - see post above.  You can use streaming services where your packet timing is subject to the vagaries of the Internet.

But if your dac is close-coupled to an input buffer, I think there are better things to spend money on than expensive clocks.

Let the battle begin