2 files changed, 7 insertions(+), 3 deletions(-)

M LICENSE
M about/version

@@ 1,5 1,6 @@
-Sound files are in the public domain. The rest of the code, and it's documentation,
-is under the GNU GPL v3+.
+Ascending & descending sound effects are licensed not for individual reuse by
+SoundEffects+. Other sound files are in the public domain. The rest of the code,
+and it's documentation, is under the GNU GPL v3.
 
 ---
 

@@ 9,7 9,10 @@
   <p>2019–2021 © <a href="https://adrian.geek.nz/" title="Author">Adrian Cochrane</a>, and others</p>
   <p>Redistribution licensed under the
     <a href="https://www.gnu.org/licenses/gpl-3.0-standalone.html" title="License">GNU GPLv3+</a>.
-    Sound effects are
+    Ascending & descending sound effects are
+    <a href="https://www.soundeffectsplus.com/content/license/">licensed not for individual reuse</a>
+    by <a href="https://www.soundeffectsplus.com/">SoundEffects+</a>.
+    Other sound effects are
     <a href="https://www.copyrightlaws.com/what-is-the-public-domain/" title="Sound effects">Public Domain</a>
     under <a href="https://creativecommons.org/publicdomain/zero/1.0/">Creative Commons Zero</a>.</p>