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Home » Hardware » Interfaces » SPDIF don't lock (Digital Input clock)
SPDIF don't lock [message #85727] Thu, 04 April 2013 10:48 Go to next message
Sonomats is currently offline  Sonomats
Messages: 6
Registered: April 2013
Location: Sweden
Junior Member
Hi! Just beginning to learn my new ULN-2. I use it with Pro Tools 10 and Mac Pro OS X 10.8.3.

I expect the clock to lock when choosing "Dig.In" as "Clock Source" and "SPDIF" as "DI-source". I connect the toslink from the Mac Pro to ULN-2 and choose "TOSLINK from "Digital Input". Both Lock ligts are off saying "Unlocked".
I also expect to be able to change the Sample Rate from the Toslink source (Mac Pro). I can't.

There is a valid clock in that Toslink since I can connect it to other gear wich locks just fine.
I can hear the sound when connecting it to ULN-2 and routing it via the Mixer.

Any suggestions? A problem with my Optical input?
Re: SPDIF don't lock [message #85728 is a reply to message #85727] Thu, 04 April 2013 11:17 Go to previous messageGo to next message
Allen is currently offline  Allen
Messages: 156
Registered: July 2011
Senior Member
Administrator
Set the Clock Source to ADAT, and in the Digital Input meter section click on the disclosure triangle and select "Toslink".

The DI Source switch toggles between the copper-based SPDIF and AES inputs, and is not used for optical connections.


Metric Halo
www.mhlabs.com
727-725-9555
Re: SPDIF don't lock [message #85729 is a reply to message #85728] Thu, 04 April 2013 13:11 Go to previous messageGo to next message
Sonomats is currently offline  Sonomats
Messages: 6
Registered: April 2013
Location: Sweden
Junior Member
Thank you Allen!
Will ULN-2 lock to the Toslink SPDIF and will MIO Console light up the Sys: "Locked" but DI will still be "Unlocked"? Will I also be able to control the sample rate of ULN-2 from the SPDIF source (Mac Pro) this way?
(I'm not at work so I can't test it right now)
Re: SPDIF don't lock [message #85730 is a reply to message #85729] Thu, 04 April 2013 13:47 Go to previous messageGo to next message
Allen is currently offline  Allen
Messages: 156
Registered: July 2011
Senior Member
Administrator
The ULN-2 will lock to Toslink, and should show DI lock once the clock is set to ADAT. You can change the sample rate from MIO Console or Audio MIDI Setup.


Metric Halo
www.mhlabs.com
727-725-9555
Re: SPDIF don't lock [message #85738 is a reply to message #85730] Fri, 05 April 2013 15:32 Go to previous messageGo to next message
Sonomats is currently offline  Sonomats
Messages: 6
Registered: April 2013
Location: Sweden
Junior Member
Hi! Sorry to say, but that's not how my ULN-2 behave. Perhaps I shall open a support ticket?
Re: SPDIF don't lock [message #85739 is a reply to message #85727] Fri, 05 April 2013 15:55 Go to previous message
bj is currently offline  bj
Messages: 384
Registered: July 2011
Senior Member
Hi Sonomats,

Actually, the optical SPDIF is a little different than regular (copper) SPDIF.

The Optical SPDIF is run into the SPDFI reciever on the DSP on the 2d Card, and the receiver is run directly into an extremely high-quality SRC. The Optical SPDIF is not available as an external clock source on the MIO; it is always SRC'ed to the box's sync source. If you need the ULN-2 to be sync'ed to the device that is sending the Optical SPDIF, you will need to use word clock or copper SPDIF or AES as the sync source, or you will need to sync the external device to the MIO.

You should not select ADAT or SPDIF as the sync source when using Optical SPDIF as the input -- use Internal or another available (and valid) sync source.

Sorry for the confusion.

Best regards,

B.J. Buchalter
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