KONA 2 AES issue

AJA Video Systems

KONA 2 AES issue

Posted by Tom Meegan on July 26, 2005 at 2:04 am

Hello,

I was freelancing for FOX Sports’ broadcast of the MLB All-Star Game, editing on a FCP system with a Kona 2 card and ran into an issue that puzzled me. I was wondering if anyone here had any insight. It was my first time using the Kona 2 card, so I’m hoping it was just something I missed.

I was using a rental system (FCP 4.5, Dual 2.5ghz Power Mac, 2.5 gig of ram, 2.0 tb xraid) with a Kona 2 card, using the harness (no K-Box). I was receiving 2 channels of AES audio from a BNC cable; we used a BNC to XLR adapter to take this into the harness. To confirm levels and continuity with the Audio engineer, I put the system in EE by going to capture mode. When I broke audio Channel 1 at the router input, audio Channel 2 broke, and vice versa. I confirmed my outputs to the router – they were good.

I know it was not router programming, because there were approximately 20 other record destinations (VTRs and EVS XTs) that all checked out fine. We eventually just mapped 1 to 2 and 2 to 1 in the router software and moved on, but I would like to know if there was something I could have done in my system to fix this. Or if there is someone out there who understands AES audio, could it have been our adapter? Or something else in the line.

I’ll be using this system a lot in a similar configuration in October, so I would love to figure this out.

Thanks,

Tom Meegan

Tom Meegan replied 20 years, 9 months ago 3 Members · 4 Replies
4 Replies

Bob Zelin
July 26, 2005 at 3:30 am

Hi Tom –
I have your answer, and an even easier answer for you. Open the Kona Control Panel, and you will see in one of the input tabs, the ability to choose AES audio or Embedded audio. The Kona control panel is NOT part of FCP – it is a seperate little program. BUT you dont even have to worry about the AES feed. All Sony and Panasonic VTR’s have embedded audio in the digital video stream. You can simply choose embedded audio, and if you see a SDI or HD SDI picture, you will also get the audio along with it – as long as you choose EMBEDDED audio in the Kona Control panel.

Hope this helps.

Bob Zelin
Tom Meegan
July 26, 2005 at 10:45 am

Thank you Bob. I will give this a try when I am next on the system.

I’m sometimes required to take an audio source that is distinct from the video
Jeremy Garchow
July 26, 2005 at 4:21 pm

Do you know which version of the K2 drivers you were using? I think the previous version (to the most current) of the drivers fixed this audio mapping problem (the Kona 2 used to reverse the order of the audio channels). Maybe I’m wrong, and this wasn’t your problem, but it sounds like a driver update was in order. Also, there’s a BNC ‘harness’ so you don’t have to use the BNC to XLR adapter with the Kona 2.

Jeremy

———–
G5 Dual 2Ghz <> 4GB RAM <> FCP 4.5 <> Kona 2

ATTO 42XS <> Huge Systems 1.25 TB 4105 Fibre
Tom Meegan
July 26, 2005 at 9:50 pm

Jeremy,

It is likely that this is the issue, as the system was out doing Nascar, installed in a mobile unit, for months before I saw it. Once it was integrated, it was left alone.

I’ll pass this thread along to the owner of the system and see what he thinks.

Thanks for your reply.

Regards,

Tom

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