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DeckLink SP audio out
I have the XLR outs on my DeckLink SP going into a Behringer audio board, straight from the breakout cable into balanced XLR inputs on the mixer. The levels out of the DeckLink card are way too hot. The audio is completely distorted and clipping, even with the trim on the mixer inputs set to +10. If I connect the DeckLink directly to my Beta SP deck, I get the same thing. This is with any audio out of the card, whether in Premiere or Windows Media Player, Audition, etc.
Is there a audio output adjustment I’m missing somewhere in the DeckLink software?
Jeff Kosmicki
http://www.toyraygun.net -
3 Replies
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NEVER go into the XLR inputs on a Behringer, Mackie or Soundcraft audio mixer. You should ONLY go into the 1/4″ stereo phone plug line inputs
of your mixer. The XLR inputs are MIC INPUTS, and the trim control on each channel can only attenuate the input signal so far – you are plugging your Blackmagic product into MIC PREAMPS !!!! DONT DO THIS. The LINE INPUTS of these mixers are the 1/4″ stereo phone plug inputs.YES, you will have to purchase XLR to 1/4″ phone plug cables. So why does Blackmagic provide XLR connectors, instead of 1/4″ stereo phone plug inputs? Because EVERY MANUFACTURER IN THE HISTORY OF EDIT SYSTEMS has provided XLR connectors. When Mackie released their mixers a long time ago, everyone thought they were crap (becuase they were so inexpensive), and you had to do this “strange thing” – plug into the 1/4″ line inputs – what professional would do this. Fast foward 20 years, and now EVERY major mixer manufacturer (of small “music industry” audio mixers) does this.
The distortion you are hearing is called PEAK distortion. The nominal output of the Blackmagic card is +4dBu, and this is the level that is expected on SOME Behringer mixers. You will find that the more expensive Behringers use +4dBu at the ZERO VU position on the LED’s, and the less expensive models use +0dBu as the ZERO VU position. It is certainly disturbing to feed a Sony Beta VTR, whose meters read ZERO into a less expensive Behringer mixer, only to find out that the LED’s illuminate up to the “4” position, silk screened on the mixers front panel.
If you see other responses from others stating “this guy is a moron, and does not know what he is talking about – we use the XLR inputs on the mixers all the time” – these people are INCORRECT, and misdirected, and have no knowlege of these audio mixers, nor have they ever read the manuals for these products, or spoken with the manufacturers.
Bob Zelin
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This is correct. The only thing we need to do is to pull down the master volume of Premiere down with about 9db (could be 6, I’m not really sure anymore since it has been a while since I’ve been on a Premiere system. Also mono and stereo are different).
-Yves
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