Latest post Wed, Feb 18 2009 5:20 PM by phoenixofedair. 4 replies.
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  • Wed, Feb 18 2009 4:57 PM

    Audio Levels for broadcast

    Hi

    I'm preparing to send out an omf for a friend who offered to do a stereo mix on my latest project (50 min TV show PAL). He's using Logic instead of pro tools, whatever its free. He asked me if he needed to output the audio with any limits/specs for broadcast. I said yes and these are......I have no idea. Sound has always gone out of house and I'm afraid its a massive gap in my knowledge. The problem is I just got this job and its my first as the ONLINE guy and I have never handled this part of the job (i'm just a cutter really). Could someone help me with what levels the mix has to come back to me in. The project will be rolled to DigiBeta. Now the clock/bars etc that I have has a reference level of -12db. I read somewhere that you are allowed 10db over your reference level so does that mean my audio cannot peak over-2db? Someone help please.

    Cheers

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  • Wed, Feb 18 2009 5:04 PM In reply to

    • kellyv
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    Re: Audio Levels for broadcast

    Boy this has become a bit of a grey area (at least in spot world). Some houses are pushing it all the way past -6 only to get it kicked back by some stations. They claim that it is better to go higher with the levels when digital because distortion only occurs at the very top. Problem is, when you make analog dubs that are calibrated standard levels, they will distort. I've gotten into some nasty talks with audio production folks about this. Safe bet would be to keep an average of -10. But I'm sure some audio folks might have words about that.

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  • Wed, Feb 18 2009 5:11 PM In reply to

    Re: Audio Levels for broadcast

    So is it best to have my sound mixer mix as he would with 0 db as the top limit and limit it once I have brought it back into avid or should he mix and then place a limiter on it as his final step and just plonk it straight into the timeline? God this is an absolute nausfest.

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  • Wed, Feb 18 2009 5:14 PM In reply to

    Re: Audio Levels for broadcast

    If you want to do it right, you should definitely check the specs of the broadcaster you are supplying to. In Holland (and AFAIK in Germany) it is common to have reference tone at -18dB FSD and peaks at -9dB FSD (so 9dB's above reference level). I think BBC specifies 8dB over reference, so maxing out at -10dB FSD.

    Again, check the specs as supplied by the broadcaster, or else you'll risk having your master rejected.

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  • Wed, Feb 18 2009 5:20 PM In reply to

    Re: Audio Levels for broadcast

    Guys thanks so much for your help, I think I'm going to have my sound mixer place the limiter as his final step and just replace my timeline's audio. The broadcasters spec is -18 db with 8db peaking over so that makes it -10 db. I think I understand now, I have to change my bloody bars.

    Thanks alot guys. Avid forums=genius.

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