More > JRiver Media Center 19 for Windows
NEW: Improved audio analysis and volume leveling (R128)
mwillems:
--- Quote from: Rafal Lukawiecki on November 24, 2014, 12:36:40 pm ---If I understand you correctly, this might then be a bug, as in this case the Volume Level R128 is, actually, a positive figure of 12.9, not a negative number, like for majority of my tracks. I understood that negative meant attenuation but positive values meant volume boosting. I have 332 tracks for which Volume Level is a positive number. Why would this happen?
--- End quote ---
I've never seen a track that required a positive adjustment of 12 dB, so I misunderstood what you posted; my apologies.
Volume levelling is trying to achieve a specific level (83 dB at -20dBFS) and some tracks will have positive values because the tracks in question are very, very quiet tracks. In order to make them "the same volume" as other tracks they would need to have volume added to them. I misspoke before when I said volume leveling never boosts; in practice volume leveling very rarely adds boost because the vast majority of tracks have a peak level at or near 0dBFS, so no volume can be safely added. Your track is unusual in that it has a very low peak level as well, so about 4 dB could be safely added, but that's it.
So the track would need 12 dB of boost to sound "the same" volume as other tracks, but because it peaks at -5.1dB, only 4 dB can be safely added, and that's the most volume leveling would ever add. Sorry for the miscommunication/information!
Rafal Lukawiecki:
--- Quote from: mwillems on November 24, 2014, 01:56:44 pm ---Your track is unusual in that it has a very low peak level as well, so about 4 dB could be safely added, but that's it.
So the track would need 12 dB of boost to sound "the same" volume as other tracks, but because it peaks at -5.1dB, only 4 dB can be safely added, and that's the most volume leveling would ever add. Sorry for the miscommunication/information!
--- End quote ---
Many thanks for your explanations, they are very helpful. Let me check if I still understand it the way you have explained, though: in this track, even though the Volume Level R128 has been calculated as +12.9 LU, but because the Peak Level R128 is -5.1 dBTP, Volume Levelling would not add the 12.9 boost, but only the smaller amount, that is of 5.1 dB, in order to prevent clipping. Is that correct or have I still misunderstood? Many thanks for your patience...
mwillems:
--- Quote from: Rafal Lukawiecki on November 24, 2014, 02:10:14 pm ---Many thanks for your explanations, they are very helpful. Let me check if I still understand it the way you have explained, though: in this track, even though the Volume Level R128 has been calculated as +12.9 LU, but because the Peak Level R128 is -5.1 dBTP, Volume Levelling would not add the 12.9 boost, but only the smaller amount, that is of 5.1 dB, in order to prevent clipping. Is that correct or have I still misunderstood? Many thanks for your patience...
--- End quote ---
You're very close, and you have the principle correct, but with one tweak: volume leveling typically leaves a 1dB "margin of error" to make absolutely sure no clipping occurs. So the most I would expect volume leveling would add is 5.1 - 1 = 4.1dB
Bigguy49:
While aware of its impact audibly, definitely a newbie to the world of measured DR!
Recently found out about the <dr.loudness-war.info/> database and, after googling a bit on using Audacity to generate DR values, learned that MC will generate them. Very nice, BTW! Not sure how comparable the results might be but I am sure they are close enough for my purposes since I am not doing any automatic Volume Leveling. Information in the Wiki on Analyze Audio was a bit lean. It would be helpful for us that are less technically savvy to have a (simple?) explanation of what the various results are and/or mean to the average listener. Skimming this thread made my head hurt! :-)
I see where I can select track(s) of an album, etc., and then activate the Analyze Audio option. Is there some way to select ALL tracks in my library and generate the data "enmasse"? IF so and I chose to analyze the full database, then I guess I would need to keep track of what was added subsequently and batch analyze?!
Can the Analyze Audio be used on PCM formats other than 16/44? How about DSD?
Thanks in advance.
ferday:
--- Quote from: Bigguy49 on January 29, 2015, 02:47:46 pm ---While aware of its impact audibly, definitely a newbie to the world of measured DR!
I see where I can select track(s) of an album, etc., and then activate the Analyze Audio option. Is there some way to select ALL tracks in my library and generate the data "enmasse"? IF so and I chose to analyze the full database, then I guess I would need to keep track of what was added subsequently and batch analyze?!
Can the Analyze Audio be used on PCM formats other than 16/44? How about DSD?
Thanks in advance.
--- End quote ---
go to your audio view, select all the tracks (shift-click), and analyze the audio. if you have a lot of tracks it will take some time!
in the analyze audio menu, there is a checkbox "skip analyzed files". check this, and never think about which files have been done or not, as MC will skip previously analyzed files
you can analyze any PCM bit/sample rate, and DSD .dff files. you can also analyze the audio for video files using the same tool
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version