More > JRiver Media Center 18 for Windows
NEW: Loudness
JustinChase:
My understanding is that the "reference level" is the 'threshold at which lower volumes will have the filter applied', and anything over the reference level acts as ever before (no adjustment caused by the loudness setting).
So, once you get over the reference level, it will be as if it doesn't exist.
Trumpetguy:
--- Quote from: JustinChase on January 04, 2013, 02:18:24 pm ---My understanding is that the "reference level" is the 'threshold at which lower volumes will have the filter applied', and anything over the reference level acts as ever before (no adjustment caused by the loudness setting).
So, once you get over the reference level, it will be as if it doesn't exist.
--- End quote ---
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Yes, I got that bit.
I am just not used to a volume scale that goes above 0dB.
Matt:
--- Quote from: Trumpetguy on January 04, 2013, 02:39:29 pm ---I am just not used to a volume scale that goes above 0dB.
--- End quote ---
How about one that goes to 11:
http://www.youtube.com/watch?v=EbVKWCpNFhY
mojave:
Trumpetguy, you are thinking of the maximum digital signal which is referred to as 0 dBFS. Some audio devices like external DACS will also use 0 dB to refer to maximum volume.
In Bob Katz's book Mastering Audio: The Art and Science, he recommends that studios (music or movie) should calibrate their audio system so that limited bandwidth pink noise encoded at -20 dBFS will playback at 83 dB. Tones that meet this standard are included in Disney's World of Wonder calibration Blu-ray. This is called Reference Level. When I use these tones on my system, 83 dB is at about 91% depending on whether I am using convolution. I then set 91% as Reference Level in JRiver.
I am assuming that the music or movie was mastered while listening at this level and that no adjustment is needed via the loudness feature. When I listen below this level, now the loudness feature will boost the low end more and more as I turn down the volume. In this case, 0 dB just refers to the level that matches Reference Level and I can play above this level all I want.
In reality, music was probably mastered while listening even lower than Reference Level and I could set JRiver to 85% (or whatever) to only have loudness take effect below that. I could also use the ZoneSwitch feature and have music set with a different Reference Level than movies.
Matt:
--- Quote from: mojave on January 04, 2013, 03:07:02 pm ---In Bob Katz's book Mastering Audio: The Art and Science, he recommends that studios (music or movie) should calibrate their audio system so that limited bandwidth pink noise encoded at -20 dBFS will playback at 83 dB. Tones that meet this standard are included in Disney's World of Wonder calibration Blu-ray.
--- End quote ---
Maybe Tools > Advanced Tools > Create Test Clips should create a volume calibration file at this standard?
I'm not quite sure how you quantify "pink noise at -20 dBFS", or even "pink noise at 0 dBFS" for that matter.
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