diff --git a/pages/audio.granular.md b/pages/audio.granular.md
index 69f8b8d..f0526d4 100644
--- a/pages/audio.granular.md
+++ b/pages/audio.granular.md
@@ -40,4 +40,6 @@ also win
 
 ### ai music
 - https://www.youtube.com/watch?v=ry5eCasj2S4
-- https://www.amazon.com/power-sequencer/s?k=power+sequencer
\ No newline at end of file
+- https://www.amazon.com/power-sequencer/s?k=power+sequencer
+## in pure data
+- http://www.pd-tutorial.com/english/ch03s07.html
\ No newline at end of file