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ReplayGain2, ReplayGain2 proposal
jukkap
post Jul 23 2011, 16:33
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I suggest we discuss about possibility of creating ReplayGain2 specification that would replace the current ReplayGain.

ReplayGain2 would be playback compatible with the current ReplayGain (all current ReplayGain compatible players would work), but it should use ITU-R BS.1770/EBU R128 to calculate gain levels.

Current ReplayGain algorithm is odd and difficult and not properly specified. It also does not work for multichannel audio. ITU-R BS.1770/EBU R128 would overcome these issues.







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Pat_
post Aug 9 2013, 14:47
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QUOTE ([JAZ] @ Aug 8 2013, 15:48) *

I could understand that a user could want to apply RG2 (rg tags+r128 algo), over previous RG1 (rg tags +rg algo).


Exactly. This is what prompted my entry in this forum.
Given the principle that REPLAYGAIN_ tags may only be used to hold values calculated using the RG or RG2 method, there can be no real discomfort in listening experience as the levels are both set around that 89 dB target. But obviously the gains calculated with RG and RG2 will be different, not much, but different. As far as I understand it, RG2 will produce a normalization which is more on par with subjective loudness experience than RG.

Can I personally live without determining files normalized using RG or RG2 ? Of course I can. As soon as MusicBee (my music player of choice) switches from RG to RG2, I will simply re-run loudness normalization on all files.

What is learned from this discussion is that the issue is about the use or re-use of replaygain tags. Is it to store only values compliant to the RG and RG2 profile. Or can the existing replaygain tags be re-used for holding values calculated with other profiles? Clearly the answer proposed here is: only RG and RG2 profiles because otherwise there is loudness normalization anarchy. That's clear. That's fine for me. ;)

Cheers

p.s.
The ReplayGain 2.0 spec page indicates "under construction"; why not explicitly state the RG(2)-exclusive use principle and publish the spec? Then it is clear for everyone (and potential developers of tools).

This post has been edited by Pat_: Aug 9 2013, 14:51
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Posts in this topic
- jukkap   ReplayGain2   Jul 23 2011, 16:33
- - mobyduck   http://www.hydrogenaudio.org/forums/index....showt...   Jul 23 2011, 16:40
- - Notat   This has been discussed. I believe there's act...   Jul 23 2011, 17:36
- - C.R.Helmrich   QUOTE (jukkap @ Jul 23 2011, 17:33) Repla...   Jul 23 2011, 18:10
- - jukkap   So that is the way to go. I suggest someone will c...   Jul 23 2011, 18:40
- - nazgulord   If I may ask, how different are gain values betwee...   Jul 23 2011, 23:16
- - db1989   R128 versus ReplayGain   Jul 23 2011, 23:31
- - Notat   I've been contacted by jaynyy and we've di...   Oct 8 2012, 22:55
- - Pat_   Suggestion for ReplayGain specification 2.0 ... I...   Aug 2 2013, 15:17
- - 2Bdecided   Writing ReplayGain track and album gain tags with ...   Aug 5 2013, 11:35
- - Pat_   QUOTE (2Bdecided @ Aug 5 2013, 11:35) It ...   Aug 6 2013, 11:01
|- - 2Bdecided   QUOTE (Pat_ @ Aug 6 2013, 11:01) I believ...   Aug 6 2013, 15:40
- - Case   Pbelkner's decision to write incompatible data...   Aug 6 2013, 13:42
|- - 2Bdecided   QUOTE (Case @ Aug 6 2013, 13:42) Pbelkner...   Aug 6 2013, 15:52
|- - pbelkner   QUOTE (Case @ Aug 6 2013, 14:42) Pbelkner...   Aug 6 2013, 17:17
- - [JAZ]   @pbelkner: When you designed and implemented your ...   Aug 6 2013, 20:09
- - Pat_   Hi Guys, It was not my intention to stir things u...   Aug 7 2013, 11:13
|- - 2Bdecided   QUOTE (Pat_ @ Aug 7 2013, 11:13) I believ...   Aug 8 2013, 11:31
|- - [JAZ]   QUOTE (2Bdecided @ Aug 8 2013, 12:31) No ...   Aug 8 2013, 15:48
- - Pat_   QUOTE (2Bdecided @ Aug 8 2013, 11:31) If ...   Aug 8 2013, 14:59
- - greynol   The reference level is calibrated to pink noise wi...   Aug 8 2013, 15:23
- - Pat_   QUOTE (greynol @ Aug 8 2013, 15:23) The r...   Aug 8 2013, 15:38
- - Pat_   QUOTE ([JAZ] @ Aug 8 2013, 15:48)...   Aug 9 2013, 14:47
- - 2Bdecided   Just to be 100% clear: you can use ReplayGain tags...   Aug 9 2013, 17:15


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