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Old 08-29-2013, 09:26 AM
Gorsat Gorsat is offline
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Join Date: Feb 2012
Location: Medina, Washington
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Default Re: Room Calibration - ATSC Standards - Help

Resurrecting this thread because it's driving me nuts.

I'm doing some work on film and I want to ensure my mixes are at least "in the ballpark" with respect to the norm. So I figured I'd just calibrate my system to the standard and then play it by ear (literally).

However, I'm also running into the problem that the OP had. I calibrate using the ATSC file, or Katz's file, or a pink noise generator set to -20dBFS RMS (AES-17) and to a reading of 76 SPL on my EXTECH meter set to C and slow. Then I play the ATSC speech file and it's SKULL SHATTERINGLY LOUD! Like, crazy loud. Seriously.

Then, in order to quantify how out of bounds the loudness is, I turn down my monitor volume until the ATSC speech sample is at what sounds to me like a good, aggressive level and then replay the pink noise at this level and measure the SPL. It reads 61! (again, set to C and slow). So the "standard" calibration is 15 dB too loud for me and my room! 15 dB?!!

My monitors are 3 feet away from me in a partially treated room of about 1500 cu ft. so nothing unusual. Either my ears are way too sensitive or everyone else is half-deaf or my SPL meter is busted or the standard is crazy or ?

Does this speech file sound right to everyone else?

What am I missing?
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