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| | #1 |
| Gear interested Join Date: Jul 2008 Location: Los Angeles
Posts: 16
Thread Starter | Waves L1 Weirdness and SR Recently we had to do a series of SR laybacks for a show mixed at the studio. The network spec asked the 5.1 be limited at -2 (The mixers didn't know about this spec till after the show was mixed and printed). So we plopped an L1 on the 6 discrete channels in Pro Tools for the layback. Everything looked good. The tapes went out to QC and failed, they were almost 3 db hot....Any ideas what went wrong? |
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| | #2 | |
| Lives for gear Join Date: Oct 2007 Location: Granada Hills
Posts: 845
| Quote:
Reread the QC, and tell us what was 3 dB hot. Maybe the dialnorm??
__________________ IMDB Just finished: Americas Next Great Restaurant on NBC. "Top Chef Season 8" for Bravo. Now mixing: Top Chef Masters Season 3, Top Chef Season 9, Top Chef Just Deserts Season 2, The Real L Word Season 2, ,and Work Of Art Season 2. All Prime time slots | |
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| | #3 |
| Gear maniac Join Date: Dec 2006 Location: DC
Posts: 236
| That doesn't make sense. I think you are confusing two problems. You say that QC rejected the shows for being 3dB too hot, but you don't specify what aspect is 3dB too hot. The VU, the Dialnorm, or the peak? I don't think it could be the peak because you stated that the peaks were limited at -2dB (dBFS I'd assume). 3dB above that doesn't exist, so the peak limit is not your problem. If it's the VU or Dialnorm your L1 probably wouldn't affect your VU or dialnorm that much (ymmv) unless you used some makeup gain. Problem 1) peaks need to be limited to -2dBfs. Solution: peak limiter with threshold of -2 and no makeup gain. Problem 2) VU or Dialnorm too hot. Soluton: Tweak the mix to get it in the pocket based on the spec. -Richard |
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| | #4 |
| Gear interested Join Date: Jul 2008 Location: Los Angeles
Posts: 16
Thread Starter | You're right. Its doesn't make sense. I was referring to the peak level and its only sneaking through on the center channel, While the L1 is set with the threshold at -2. Right, there is not 3db over -2. Maybe I wasn't clear, the 3db difference came from adjusting the L1 and checking it on a tektronix meter. The QC report just said "peaking." |
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| | #5 |
| Lives for gear Join Date: Oct 2007 Location: Granada Hills
Posts: 845
| Im thinking your electrical calibration on the D/A is off. |
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| | #6 |
| Gear maniac Join Date: Feb 2004 Location: Auckland, New Zealand
Posts: 287
| You should set the L1 output to -2, and leave the threshold at -1. If you do it other way, L1 will add make-up gain.
__________________ Vedat Automatic volume riding for Pro Tools® Wave Rider v2.1 is out now with Trace function Get it from our Facebook Page http://www.automaticmixing.com |
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| | #7 | |
| Lives for gear Join Date: Mar 2006 Location: the Netherlands
Posts: 3,557
| Quote:
You need to learn about all the different types of calibration and metering. If the network ask for -2 it could be -2 dB FS but it could also be -2 PPM or -2 Dialnorm or... If a spec from a network is not clear, call them before starting any work and make sure things are clarified. It will save you work in the long run. Alistair
__________________ Alistair Johnston - TV & Film Post, Mastering, Sound Design -- "The first principle is that you must not fool yourself -- and you are the easiest person to fool" -- Richard P. Feynman "There's a sucker born every minute" -- P.T. Barnum | |
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| | #8 |
| Gear addict Join Date: Apr 2008 Location: Munich, Germany
Posts: 314
| The problem is of different nature. The HD SR you layed back on probably shows OVERS due to a metering issue Sony didn´t realize This can happen even when the Mix is limited at -2fs because the over indicator shows an interpolation of a clipped waveform. And yes still it doesn´t make sense but this is what Sony did there and now we all have to live with it unfortunately. |
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| | #9 |
| Lives for gear Join Date: Apr 2009
Posts: 729
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