diff --git a/papers/doc/7-systems/mmc5.md b/papers/doc/7-systems/mmc5.md
index faf305c6..5949dbb9 100644
--- a/papers/doc/7-systems/mmc5.md
+++ b/papers/doc/7-systems/mmc5.md
@@ -9,4 +9,4 @@ additionally, it offers an 8-bit DAC which can be used to play samples. only one
 # effects
 
 - `12xx`: set duty cycle or noise mode of channel.
-  - may be 0-3 for the pulse channels and 0-1 for the noise channel.
+  - may be 0-3 for the pulse channels