diff --git a/pages/concepts.playlisting.md b/pages/concepts.playlisting.md
index d94305a..d14f65b 100644
--- a/pages/concepts.playlisting.md
+++ b/pages/concepts.playlisting.md
@@ -67,6 +67,9 @@ By taking an optimistic idea that takes a pessimistic view of human nature throu
 
 
 https://radio.garden/visit/prague/dpbivRM8 **!!**
+https://freesound.org/people/frederic.font/sounds/456500/
+https://ffont.github.io/freesound-timeline/ 
+https://labs.freesound.org/tag/sound-exploration/