I'm just fascinated by this a sample overshoot can be half the total signal amplitude? This sounds like a situation of total silence followed by a n instantaneous 1 frame peak or something which I doubt can ever happen in reality as the sample rate is high enough to get at least one step on the way there. I'm calling theoretical vs real world on that. I've checked maybe 30 tvcs this week since this landed on my plate, peaks of -9 seem to almost all have true peaks of -8.6. Ive read a pile of manuals and I'm happy to believe its real and has an impact but after 30 years of mixing to ppms and never having a spot rejected I'm just wondering how much of it is being precise because we can and how much is reality.
Mike
> On 6 Jun, 2014, at 1:56 pm, "'Job ter Burg (L2B)' Job_L2@terburg.com [Avid-L2]" <Avid-L2@yahoogroups.com> wrote:
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>
> From what I understand:
>
> While True Peaks are generally within +1dB over sample peaks, they can be as high as +3dB over sample peak.
>
> One of the issues mixers had with the previous situation is that while they were mixing to a certain spec, the broadcasters still added Orban Optimod type limiters to their chains, meaning that what you ended up hearing at home, was not necessarily equal to the creative choices made in audio post. The new spec includes True Peak specification so that you can be sure that what you as a mixer hear and decide on, is in spec, and will sound as you intended.
>
> True Peaks also matter because they may affect sound quality, either at the D-A stage, or – not unimportant these days – when the sound enters a lossy codec or needs to be sample rate converted.
>
> J
>
>> On 6 jun. 2014, at 08:25, 'Mike Parsons.tv@gmail.com' mikeparsons.tv@gmail.com [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
>>
>> if all the samples are in spec what are we
>> really talking about at the end delivery - a .6dB overage at a speaker
>> that lasts less than 1/48000th of a second?
>
>
>
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Posted by: "Mikeparsons.tv" <mikeparsons.tv@gmail.com>
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