[Bug 753275] Opus: playback gain always relative to EBU R128 level (-23db LUFS), must be played 5db louder to match ReplayGain level (-18db LUFS) when using ReplayGain

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=753275

Sebastian Dröge (slomo) <slomo at coaxion.net> changed:

           What    |Removed                     |Added
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 Attachment #350792|none                        |reviewed
             status|                            |

--- Comment #20 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
Review of attachment 350792:
 --> (https://bugzilla.gnome.org/review?bug=753275&attachment=350792)

::: gst/replaygain/gstrgvolume.c
@@ +97,3 @@

+/* R128 needs 5 dB more to match usual replay gain semantics */
+#define R128_GAIN_ADJUSTMENT 5

It's just replaygain offset by 5dB? Seems unlikely? Are you sure it's the same
algorithm for measuring/calculating it?

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