On 24/11/2010, at 1:09 PM, Dan Dugan wrote:
>> Does the meter's use of A-weighting present a problem for the
>> low-noise mics/recorder extrapolation method--with no matching
>> weighting in the recorder? Rob D.
>
> I've just been through a calibration process for several of my systems, a=
nd A-weighting does matter. One must measure the recorded tracks with A-wei=
ghting. Pro Tools has an A-weighted meter in the PAZ meters supplied with t=
he software, but they are difficult to read and require a correction factor=
(they measure combined stereo level -6 dB. Spectrafoo doesn't have A-weigh=
ting. My best bet so far is a set of parameters for three equalizer plug-in=
s in series to create A-weighting, the result measured with Spectrafoo. Tha=
t requires a level adjustment to calibrate to unity gain at 1K, but it can =
be recorded in the setting of one of the equalizers.
>
> There's also an interesting "true peak" meter in Pro Tools 8 but I'm remo=
te right now and can't remember its name.
>
Audiofile Engineering's Spectre metering package allows you to apply A, B, =
C and ITU-R 468 weighting to meters. There is a 15 day demo that could be =
worth a play. It's a standalone OSX app and you need to use something like=
Soundflower or NetSend to route audio from your editor/DAW to Spectre.
http://www.audiofile-engineering.com/spectre/
cheers
Paul
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