diff --git a/matroska_tags.xml b/matroska_tags.xml
index 50cdbacc9..f843a159d 100644
--- a/matroska_tags.xml
+++ b/matroska_tags.xml
@@ -308,12 +308,15 @@ The majority of the contemporary rock and pop music you hear on the radio these
It is saved as a frequency in hertz to allow near-perfect tuning of instruments to
the same tone as the musical piece (e.g., "441.34" in Hertz). The default value is 440.0 Hz.
-
- The gain to apply to reach 89dB SPL on playback. This is based on the [@!ReplayGain] standard.
-Note that ReplayGain information can be found at all TargetType levels (track, album, etc).
-
-
- The maximum absolute peak value of the item. This is based on the [@!ReplayGain] standard.
+
+ The gain to apply to reach 89dB SPL on playback. The value is computed according to the [@!ReplayGain] standard.
+ The value in decibels (dB) is stored as a string (e.g., "-0.42 dB"). The decibel unit is **OPTIONAL**.
+ Note that ReplayGain information can be found at all TargetType levels (track, album, etc).
+
+
+ The maximum absolute peak amplitude of the item. The value is computed according to the [@!ReplayGain] standard.
+ The value is a normalized absolute sample value of the target audio stored as a string without spaces (e.g., "1.0129").
+ Note that ReplayGain information can be found at all TargetType levels (track, album, etc).
The International Standard Recording Code [@!ISRC],