diff --git a/users/simon/modules/mpv.nix b/users/simon/modules/mpv.nix
index 05962d2..b714a2c 100644
--- a/users/simon/modules/mpv.nix
+++ b/users/simon/modules/mpv.nix
@@ -216,8 +216,10 @@ in
           tscale-clamp = 0.0;
         };
 
-        # adapted from https://github.com/mpv-player/mpv/issues/4418#issuecomment-368272929
-        clear-speed.af-add = "scaletempo=stride=18:overlap=.6:search=10";
+        # adapted from firefox’s SoundTouch configuration (10 ms sequence,
+        # 15 ms seek window, 8 ms overlap)
+        # https://searchfox.org/mozilla-central/rev/9ae77e4ce3378bd683ac9a86b729ea6b6bd22cb8/dom/media/AudioStream.cpp#173
+        clear-speed.af-add = "scaletempo=stride=10:search=15:overlap=.53333";
       };
 
     scripts = [