On 03/07/2014 01:48 AM, Jaromír Mikeš wrote: hard problem. quickest solution: find somebody with a hardware leveller (jünger etc.) and pipe it through. problem is that there is no straightforward way from an initial loudness measurement to a level change that predictably hits the -23 dbLUFS mark. can i ask which broadcaster mandates -3dB true peak? that seems quite conservative. -- Jörn Nettingsmeier Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio) Tonmeister VDT http://stackingdwarves.net

2014-03-07 14:28 GMT+01:00 Jörn Nettingsmeier <nettings(a)stackingdwarves.net> : Czech TV ;) mira

On Friday 07 March 2014 17:34:15 Jaromír Mikeš did opine: Humm, that peak is 7db below the average vu meter reading here, and we won't even look at a board that will not handle 20-24db peaks, preferable a solid +30dbm. But now, with everything digital, it seems the producers are all living by the old AM motto, the louder the better, and I can quite easily hear digital clipping that is less than 6 db above the average. That makes it pretty darned obvious, particularly when their excrement production gear does a sign inversion in an add/mix stage to go with the peak. How then do they handle the noise floor when they are running rms 27db below a lot of the rest of the planet? That means their broadcast gear has to have a -83db noise floor to hold the mandated noise floor over here of -60db or better. Best I ever saw was -66 and that was with the video modulation removed on a UHF transmitter. We could do that to get thru a Proof of Performance on UHF because the UHF amplifiers in those days were all klystrons, which if the video was on had so much Incidental Carrier Phase Modulation that the true intercarrier measured noise was usually in the high -40's, to very low -50's if the visual wasn't tuned for best efficiency. That was not often done because it had a very noticeable effect on the monthly power bill, which at best was in the $10,000 USD/month range for most stations. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> NOTICE: Will pay 100 USD for an HP-4815A defective but complete probe assembly.

On Friday 07 March 2014 18:33:36 Fons Adriaensen did opine: Ahh, gotcha Fons, so they are saying -23db below the digital clip level. That makes perfect sense in that context, thanks. Now if we could just get the production houses to adhere to that. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> NOTICE: Will pay 100 USD for an HP-4815A defective but complete probe assembly.

Hallo! Well, it's not really hard if you have the whole file already. Shameless self promotion: https://auphonic.com For lossy audio codecs it's required to use -3dB True Peak in the official EBU R128 document. For lossless audio -1dBTP should be used ... LG Georg -- auphonic - automatic audio post production http://auphonic.com audio development, machine learning, open source and more