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Technique: Everything You Never Knew about PPMs
by
Larry Jordan
[This article was first published in the May, 2008, issue of
Larry's Final Cut Pro Newsletter. Click here to subscribe.]
When I was in the UK, I ran into an audio system I'd never heard of
-- PPM. Apparently, it is all the rage at the BBC and points east.
However, Final Cut Pro knows nothing about PPMs.
Thanks to the ever-resourceful Martin Baker (www.digitalheaven.co.uk),
I recently got a quick update on this format and want to share it with
you.
Martin writes:
In a nutshell, the BBC PPM scale is numbered from 1-7. Each number
on the BBC PPM scale is an increase of 4dB, tone at -18dB corresponds
to PPM4. The maximum allowed peak level for broadcast is PPM6 (i.e.
8dB above than the tone level of -18dB).
http://en.wikipedia.org/wiki/Peak_programme_meter
[However, all is not lost for Final Cut Pro users, because there's PPMulator from Raw Material Software (http://www.rawmaterialsoftware.com/ppm.php).
Their website says: PPMulator+ is a cross-platform VST plug-in meter
for digital audio workstations which exactly mimics the look and feel
of a professional broadcast Peak Programme Meter (PPM).]
PPMulator is cool because it is available as a standalone app, VST
plug-in and Audio Unit plug-in so can be inserted into an output bus
in Soundtrack Pro. Sadly because FCP still doesn't support custom audio
plug-in UIs (we still live in hope for that one!) it is not usable
directly.
So in FCP you can either run it as a VST plug-in inside Audio Hijack
Pro (works fine except the PPMulator window doesn't float over FCP)
or do the Edirol technique (didn't know that trick) with the standalone
version which does have the option to be a floating window.
Apart from the fact that they're very easy to read at a glance and
easier on the eye, the coolest thing about PPMs is that they've actually
managed to become and remain a true standard for all radio and TV broadcasting
in the UK. Imagine that. Audio level utopia!
Larry replies: Thanks, Martin, for the update.
By the way, for those of us you need better audio meters, but don't
need PPM, I've recently been using a program called ProLevel, from
Katsura Shareware (http://www.katsurashareware.com/pgs/prolevel.html)
, for my podcasts. It does a really nice job of measuring external
audio source levels prior to recording. However, it can't be used inside
Final Cut Pro.
Larry Jordan is a post-production consultant and an Apple-Certified Trainer in Digital Media with over 25 years experience as producer, director and editor with network, local and corporate credits. Based in Los Angeles, he's a member of both the Directors Guild of America and the Producers Guild of America.
The information in this article is believed to be accurate at the time of publication. However, the author assumes no liability in case things go wrong. Please use your best judgment in applying these suggestions.
The opinions expressed in this article are solely those of the author. This newsletter has not been reviewed or sanctioned by Apple or any other third party. All trademarks are the property of their respective owners and are mentioned here for editorial purposes only.
Links to my website home page or this article are welcome and don't require prior permission.
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