diff --git a/papers/doc/7-systems/sm8521.md b/papers/doc/7-systems/sm8521.md
index 693f435a..c14c9187 100644
--- a/papers/doc/7-systems/sm8521.md
+++ b/papers/doc/7-systems/sm8521.md
@@ -21,5 +21,3 @@ The sound-related features and quirks of the SM8521 are as follows:
 
 - `10xx` Set waveform
   - `xx` is a value between 0 and 255, that sets the waveform of the channel you place it on.
-- `11xx` Toggle noise mode
-  - Seems to do nothing right now.