diff --git a/sound/effects/license.txt b/sound/effects/license.txt
new file mode 100644
index 0000000000..c928a9872f
--- /dev/null
+++ b/sound/effects/license.txt
@@ -0,0 +1,2 @@
+hit_punch.ogg and hit_kick.ogg are made by Taira Komori
+(https://taira-komori.jpn.org/freesounden.html)