ATEM TTelevision Studio AES/EBU Connection Questions

2 questions:

First:

I need to go buy an AES/EBU converter to take the AES/EBU XLR digital audio output of my Yamaha audio console and convert it to the BNC input on the ATEM Television Studio. I see simple baluns out there that match the 110 Ohm output impedance of the audio console's digital XLR output, and match it to the 75 Ohm impedance needed for digital audio input to the ATEM Television Studio BNC connector. Plenty of sources for this. I also see powered converter boxes out there. Any opinion as to the plus/minus of each type? Why would I want a more expensive powered converter if all I need to do is match the impedance?

Next:

My audio console is clocked at 44.1KHz. Do I need to reconfigure it to 48KHz, or will the ATEM TS accept any of the AES/EBU sampling frequencies that are specified in Byte 0, bits 6-7 of the AES/EBU data?

First lets get converters and impedance matching devices clear:

Converter converts, in this case, analog audio signal to digital AES/EBU, on the other hand impedance matching device only matches the impedance of the cable. So if you want to run audio from XLR cable to 75Ohm Coaxial or other cable all you would need is impedance matching device otherwise mismatch can cause severe signal loss. (For short patch cable runs, it is fine).

So there is no plus or minus to these devices. If you want do get digital signal from analog you need converter and not impedance matching adapter.

Many people use Behringer ULTRAMATCH PRO SRC2496. And if you do research you will find here in this forum what people use to connect it to TVS. (Simple RCA to BNC cable... from digital out in SRC2496)

Hope this helps.

Thanks for the reply. I was actually looking at 2 different devices:

http://www.hosatech.com/product/339824/ ... _to_AESEBU
versus
http://www.neutrik.com/en/accessories/a ... nsformers/

The Yamaha M7CL audio console has an output port that emits AES/EBU via an XLR port at 32, 44.1 or 48KHz. So this is a digital-to-digital situation and not an analog-to-digital conversion. So all that should be necessary are the functions to match impedance and the physical connectors. Thus I assume a balun like the Neutrick product will do the job. In thinking about this further I wonder if the advantage of a powered unit might be a degree of signal amplification for longer cables, but the Hosa product info does not indicate that it amplifies the signal.

I'm still looking to find out whether the ATEM TS accept AES/EBU audio data at various bit rates as per the AES protocol specification, or whether it only accepts data at 48KHz. Our audio systems are all clocked at 44.1 by an external central clock. The clock can be reconfigured to 48KHz, but I'd rather not do this as it is not clear what effect (if any) a clock change might have on other audio processors, plug-ins, and computer applications that are part of the audio system. If no one on this forum knows for certain if the ATEM TS accepts 44.1KHz or not, I can find this out by experimenting with the Yamaha digital audio output port configuration, and will post the results.

Yes, simple balun that will match the impedance will work just fine in your case. I'm not sure why Hosa CDL-313 is expensive but it probably performs signal restoration/amplification to standard level. Too bad they don't provide any spec sheet for it.

Ethan : in video, we are using 48kHz.. Maybe atem will get 44k from your yamaha, but may be any gaer afer Atem will have problem with 44kHz..
Get behringer src 2494.. It will do everything, what u need..

The Hosatech CDL-313 is not just converting between Coaxial and XLR, it is also converting between SPDIF and AES/EBU.

Coaxial SPDIF is not the same as coaxial AES/EBU (although very similar).
Sometimes you can get away with treating them the same, sometimes not.

The Neutrik AES/EBU Impedance Transformers linked to above are the ones you want.

Src2496 do all the same + can SRC 44k -> 48k

the DEQ2496 is actually nicer as it includes also a delay unit...

Deq is digital EQ.. Have not SRC and have tons of unwanted functions..

I connected a balun between the Yamaha M7CL AES/EBU XLR digital audio output port and the ATEM Television Studio 75 Ohm Coaxial digital audio input port, and the ATEM TS worked properly with 44.1KHz audio. Blackmagic Media Express has no issues recording the H.264 output from the USB2 port with the audio properly embedded. It appears the ATEM is properly decoding the field in the AES/EBU data that specifies the audio sample rate (although I do not plan to test this at 32KHz.) Appreciate all the comments!

Ahh.. U wanted just record h264 stream ? Great to hear, that your setup works ..

Deq is digital EQ.. Have not SRC and have tons of unwanted functions..

the delay unit is essential for lipsync...