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Old 5th December 2012, 05:58 AM   #21
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Originally Posted by Melo theory View Post
It could be an average of the highest peaks to the lowest peaks, which will give you a lower value than a single measurement of the very highest peak to the very lowest.
I agree with this. There is some average going on, I just don't know where it is.

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This would be a good way to do it because, think about this....
Even if a track is completely brick walled, if there is a moment of complete silence, then that would give a very large DR measurement if they weren't averaged out.
You must be my twin brother, because this is what I believe as well.
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Old 5th December 2012, 06:04 AM   #22
freax is offline freax  Australia
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it probably compensates for silent portions of a song and skips it, thats not difficult to do in programming.
someone feed it a silent song and see if it processes it faster than another song of the same size and length but with audio in it, if the result is a very high number on the silent song then we have problems.
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Old 5th December 2012, 06:11 AM   #23
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it probably compensates for silent portions of a song and skips it, thats not difficult to do in programming.
someone feed it a silent song and see if it processes it faster than another song of the same size and length but with audio in it, if the result is a very high number on the silent song then we have problems.
I don't know about this because songs start out lower in level and end with a fade out or on a reverb decay.
I don't think the program could skip that?
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Old 5th December 2012, 06:18 AM   #24
freax is offline freax  Australia
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there is one way to find out, do the above test, usually there is a 3 second delay for skipping silent portions of a track, it waits before it hears 3 seconds then it starts to skip ahead.

though averaging the score does have the same effect, I'm just afraid of it losing accuracy of an albums true dynamic range, say for example an eminem album which you would expect to have very nasty compression going on being weighted in a favourable light simply because the track has 2 songs that are partially silent and one hidden track that is silent for 15 minutes........

Like on hip hop tracks that have women crying in boots of cars or rappers talking for 3 minutes at a time.

if they are going to implement an automatic database system then this might need to be adjusted for by including a silence detector.

if it has that silence detector then I can believe the DR score more.
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Old 5th December 2012, 06:12 PM   #25
Pano is offline Pano  United States
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The RMS value of a track doesn't skip the quiet parts, it counts them too. That would mean that the RMS value of a track is lower than just the average parts of the music - minus the silence.
However, in practice, if I remove the silences the value does not change much. Most popular music has very little silence in it. So in practice it's all averaged out.

That leaves me still not understanding the numbers in the DR database, unless they simply don't relate to decibels. That's possible.
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Old 9th December 2012, 04:33 PM   #26
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Dec. 13 guys.
Commercial Advertisement Loudness Mitigation Act - Wikipedia, the free encyclopedia
First TV, then radio.
Then maybe they can start mastering digital audio the way it was intended....for incredible dynamic range!

This is an example of why capitalism and the free market isn't always the best philosophy.
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Old 9th December 2012, 04:56 PM   #27
KSTR is offline KSTR  Germany
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The DR test is somewhat useless to judge the actual/experienced quality of compression because it doesn't model psychoacoustics. Wether overly compressed material sounds crushed is a matter of time constants used, and clever producers use the ones which make the sound still punchy in the short time scales while it may be leveleled out "flat" in the longer time scales (2++ seconds).
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Old 9th December 2012, 08:07 PM   #28
Pano is offline Pano  United States
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There is also the practice of heavy, heavy layering of sound. Remember Phil Spector's wall of sound? Nothing compared to today's heavy mixes. It's hard to uncompress that stuff.
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Old 9th December 2012, 08:53 PM   #29
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The DR test is somewhat useless to judge the actual/experienced quality of compression because it doesn't model psychoacoustics. Wether overly compressed material sounds crushed is a matter of time constants used, and clever producers use the ones which make the sound still punchy in the short time scales while it may be leveleled out "flat" in the longer time scales (2++ seconds).
I think while your overall comment is correct, the use of compression should be replaced with limiting. It is the overactive use of limiting that has caused the loudness war, not compression as many believe.
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Old 27th October 2013, 02:37 AM   #30
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Engineer predicts Apple's iTunes Radio will put an end to overly loud recordings | The Audiophiliac - CNET News
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