diff --git a/Using-the-Soundtrack-Tool.md b/Using-the-Soundtrack-Tool.md
index 01e2180..fd7786c 100644
--- a/Using-the-Soundtrack-Tool.md
+++ b/Using-the-Soundtrack-Tool.md
@@ -22,7 +22,7 @@ This tool converts a tracker squence into a format that can be played on-console
    * Position jump can only be set once and to a pattern matrix row less than or equal to the current pattern matrix row. This will be converted into an [$FD/$FC ESF event pair](https://github.com/sikthehedgehog/Echo/blob/c83e424e7736d07690ace2488bf9195ed27f7af4/doc/esf.txt#L412), with its own limitations.
 * `Dxx` Jump to next pattern
 * `17xx` DAC Enable (FM6)
-* `20xx` Noise generator mode
+* `20xx` Noise generator mode (SN4)
 * `ECxx` Note cut 
 
 ## Roadmap