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Old 11th June 2009   #47
danijel
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Quote:
Originally Posted by eanan View Post
thanks for getting back to me Danijel, so does this mean that my entire mix can't go past -10 on my levels??
Probably, but I can't guarantee you that. If you can, get a PPM meter like PPMulator and make sure you don't cross the 6 mark.


BBC Type PPMs to BS 5428 are scaled in 4dB steps numbered from 1 to 7 with
increasing signal level. They are calibrated so that line-up Level will read PPM 4 and
thus Peak Programme Levels shall not read higher than PPM 6.
Digital “true” peak reading meters such as on VTRs and DAT recorders will typically
read 4dB higher than a BS 5428 PPM on programme material though they should
agree on steady tone. As it is unusual for digital level meters to match a BS 5428
PPM when measuring programme material, suppliers should never use “peak
reading” meters to assess programme levels accurately unless they are known to
meet BS 5428.

From this excerpt it looks like you'd be pretty safe at -10dBFS, because short peaks (as far as I understand it) could even go to -6dBFS, while the PPM wouldn't cross the 6 mark. But I'm just guessing here. If no-one from the PPM-land (UK, Ireland) chimes in here, start a new thread or try looking some more - I'm sure this has already been answered before, either here or at the DUC - try searching for "PPM", "peak", "BBC" etc.
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