Please detail the configuration.

Do you use only SPDIF coax or also optical SPDIF ? How long are the cables ?

How did you set clock on both devices. Which device is master, which slave ?

Hi. Thanks for the replies. This device needs to be coax only, I have a PC that's in another room fed into the USB for films, t.v etc and a ps3 on the optical. Now that's interesting, just tried optical and it works! I have tried 2 different coax cables but to be fair one could be dodgy, its a Kimber that was given to me. I've also tried a phono cable I had lying around with similar results. Assuming optical and coax come from the same source clock (which I remember auralic saying they do) then they should work? Does this narrow it down to the cable I'm using? The coax cables are both 75cm. As far as I'm aware with dac version, on optical and coax, the dac just uses the external clock so is slave and can't be set to master and use its internal clock? Hope this helps narrow it down. Was actually really surprised optical worked at this sample rate!!

Hi. Sorry if gave you the wrong impression. 2 of the cables used were correct spdif coax 75 ohm cables. I tried one which was an audio interconnect as a last resort. I'm having a new cable built by someone who will check it make sure it measures properly just to make sure. Can't see how it would make a difference unless the other cables were broken...

Edit: part of the problem is I can't ssh into the thing to get alsa to probe the devices. I don't have the passwords, if anyone knows them please let me know.

Edit 2: Sorry for the extra bits! I've borrowed one of these https://www.amazon.co.uk/dp/B01MYWPKU8/ … B0015LNV2M which works at 192khz on a friends leema elements dac. Optical (same signal that worked into the optical in on the dac from the aries) in, spdif out, same problem with both 75 ohm coax spdif cables. Works fine at 96 but cannot lock onto a 192 signal. Does this help narrow down the problem?

I just re-checked that at 192 kHz sample rate a coaxial SPDIF signal of about 250 mV peak to peak is enough for stable operation. Below that the lock errors and false Emphasis display mentioned above are shown, and a bit lower (200 mV) it stops working. The standard calls for typically 500 mV, so it seems to look good on our side.

As usual at lower sample rates the input is even more sensitive, operates correctly from 150 mV at 44.1 kHz.

Please note that SPDIF coaxial carries ground from one unit to the other. The signal quality might be affected by the power supply situation, which could be checked by reversing the ADI's PS plug.

FWIW I never had trouble with a Lynx AES16e -> AES/BNC converter -> BNC/RCA adapter -> ADI-2 DAC. No dropouts or anything of that nature.

No. I said that my unit works according to the spec. That does not mean yours does. To examine this further you will need to have your unit checked at your local dealer, distributor or RME, whatever fits.

Hallo wertes RME Team

Ich habe mir vor ein Paar Tagen euren tollen adi 2 dac für meine Hifi Anlage zugelegt.
Leider habe ich das gleiche Problem wie hier beschrieben mit dem Coax Anschluss.

Ich betreibe einen Technics ST-C700 Netzwerkstreamer, welcher per coax angeschlossen ist. Flac Files bis 96 funktionieren tadellos. Sobald ich jedoch 192er Files abspiele, kommt die Meldung: "Emphasis detected". Dabei ist mir aufgefallen, dass die Samplerate verrückt spielt. Sie blinkt rot und veränderet sich stetig (96,191,192 usw.) Ebenfals wechselt das Gerät immer wieder zwischen internal clock und spdif cock

Habe den Adi 2 nun via optical angeschlossen und siehe da: Allea funktioniert wie es soll.

Habe die Files übrigens mit zwei anderen DACs getestet. Der Coax Amschluss hat da einwandfrei funktioniert...

Habt ihr eine Idee?

Grüsse aus der Schweiz.

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mfg
Daniel Fuchs
RME

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