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[Yiannis]

I wonder what will happen using 110ohm cable instead the normal 75ohm for SPDIF.
are there any artifacts?
differences on sound quality?
How would you check it?

Someone mention a bitscope to test it,but I can't configure it out.

Thank you

Yiannis

[bobkatz]

Yiannis wrote on Mon, 06 June 2005 05:20

I wonder what will happen using 110ohm cable instead the normal 75ohm for SPDIF. are there any artifacts? differences on sound quality? How would you check it? Someone mention a bitscope to test it,but I can't configure it out. Thank you Yiannis

For short cable runs you can do just about anything. A bitscope won't tell you how stable the interconnection is. All us mortals can do is listen for glitches and maybe if you have a lock light look for a steady lock light.

If you wish to mismatch connectors or terminations or cables, just keep the cables very short and you PROBABLY will continue to have a stable connection. Jitter will likely go up, but this is irrelevant as long as you are not clocking a converter to this signal. In other words, as long as you are making a digital transfer and processing digitally.

As for AES versus SPDIF software, way back before 10-15 years ago when pre-emphasized sources were more common, it was possible to misread the emphasis bit, but nowadays nearly EVERY receiving piece of sofware ignores the emphasis bit and assumes it is turned off. So you can feed SPDIF protocol into an AES receiver and vice versa with no troubles.

As for the hardware issues, I cover a lot of those tricks (how to get an SPDIF source into an AES receiver) in my book. And there are schematics floating on the Internet.

BK

[Yiannis]

Thank you Bob!

So you say that I can connect an SPDIF OUT to an AES IN and vice versa without a trouble?
Is there any advantage of doing that?
Did I understad this well.

As for another threat that I have post here about my HEDD 192 ,and you have helped me  alot,Everything is going well because I have sent it to Dave and he will take care of it.
As for Crane song help......They are the BEST  David and Scott!
Guys I am very happy that I bought HEDD!!

Bob ,Scott told me that there is the 192 update.Does that include new AD-DA convertors?
Out of topic but I wanted to say that

Thanks

[ted nightshade]

Thanks Bob, I'll plug my SLAM's AES i/o into my Masterlink's SPDIF i/o with more confidence thanks to your post here. Short cords, we got 'em- all of 3 feet.

[bblackwood]

FWIW, it either works or doesn't. Back at Ardent, we had occasions where we ran 30+ feet of 110 or 75 for SPDIF or AES, respectively and had no issues. It either works or doesn't, ime...

[bobkatz]

Yiannis wrote on Mon, 06 June 2005 06:54

Thank you Bob! So you say that I can connect an SPDIF OUT to an AES IN and vice versa without a trouble? Is there any advantage of doing that? Did I understad this well.

Nine times out of ten, the answer is yes, with short cables. Is there any advantage of doing that? Well, you save on the cost of transformers.

Quote:

Bob ,Scott told me that there is the 192 update.Does that include new AD-DA convertors? Out of topic but I wanted to say that Thanks

Not working for Cranesong I really don't know anything about products that haven't hit the market.

[Yiannis]

Quote:

Nine times out of ten, the answer is yes, with short cables. Is there any advantage of doing that? Well, you save on the cost of transformers.

If I have two devices,one with both protocolls and the other  only with SPDIF.
Is it wise to connect AES to SPDIF or use both units under SPDIF?
Would I gain something from the 1st option?

Yiannis

[Mark Donahue]

ted nightshade wrote on Mon, 06 June 2005 08:40

Thanks Bob, I'll plug my SLAM's AES i/o into my Masterlink's SPDIF i/o with more confidence thanks to your post here. Short cords, we got 'em- all of 3 feet.

Dear Ted,
I just have to comment. Why would you purposfully use an incorrect impedance and level mismatch when the appropriate connection is available?
All the best,
Mark

[bobkatz]

Yiannis wrote on Mon, 06 June 2005 11:24

Quote: Nine times out of ten, the answer is yes, with short cables. Is there any advantage of doing that? Well, you save on the cost of transformers. If I have two devices,one with both protocolls and the other  only with SPDIF. Is it wise to connect AES to SPDIF or use both units under SPDIF? Would I gain something from the 1st option? Yiannis

Check the menus on the devices. Yamahas of the past have limited SPDIF outputs to 20 bits but latter-day Yamahas are doing all 24. If they send 24 bits to both spigots then there is no functional difference. Of course going from an XLR to an XLR or from an RCA to an RCA will give you the most likely-to-succeed signal transfer, especially at high sample rates, where impedance mismatch and jitter will more likely cause locking failures.

BK