diff --git a/sync-music/sync-music.lisp b/sync-music/sync-music.lisp
index 1e8bebc..ba24c14 100644
--- a/sync-music/sync-music.lisp
+++ b/sync-music/sync-music.lisp
@@ -42,6 +42,10 @@ extension equality."
                 :with cd-cd-text := (libcue:cd-get-cd-text cd)
                 :with album-date := (libcue:ensure-nonempty
                                      (libcue:get-rem :date cd-rem))
+                :with album-gain := (libcue:ensure-nonempty
+                                     (libcue:get-rem :album-gain cd-rem))
+                :with album-peak := (libcue:ensure-nonempty
+                                     (libcue:get-rem :album-peak cd-rem))
                 :with album-title := (libcue:get-cd-text :title cd-cd-text)
                 :with album-artist := (libcue:ensure-nonempty
                                        (libcue:get-cd-text :performer cd-cd-text))
@@ -63,6 +67,10 @@ extension equality."
                 :for track-date := (or (libcue:ensure-nonempty
                                         (libcue:get-rem :date track-rem))
                                        album-date)
+                :for track-gain := (libcue:ensure-nonempty
+                                    (libcue:get-rem :track-gain track-rem))
+                :for track-peak := (libcue:ensure-nonempty
+                                    (libcue:get-rem :track-peak track-rem))
                 :for track-title := (libcue:get-cd-text :title track-cd-text)
                 :for track-artist := (or (libcue:ensure-nonempty
                                           (libcue:get-cd-text :performer track-cd-text))
@@ -85,7 +93,11 @@ extension equality."
                                      (add-metadata "ARTIST" track-artist)
                                      (add-metadata "COMPOSER" track-composer)
                                      (add-metadata "GENRE" track-genre)
-                                     (add-metadata "DATE" track-date))
+                                     (add-metadata "DATE" track-date)
+                                     (add-metadata "REPLAYGAIN_ALBUM_GAIN" album-gain)
+                                     (add-metadata "REPLAYGAIN_ALBUM_PEAK" album-peak)
+                                     (add-metadata "REPLAYGAIN_TRACK_GAIN" track-gain)
+                                     (add-metadata "REPLAYGAIN_TRACK_PEAK" track-peak))
                                    metadata)
                 :for output-file-name := (format nil
                                                  "~A - ~A"