diff --git a/README.md b/README.md
index c3dc728..716280e 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ If the game uses battery-backed RAM (if it can save data when the console is tur
 
 ## To do
 
-- DMC audio channel, high- and low-pass filters
+- DMC audio channel
 
 - support other controllers?
 
diff --git a/src/main.rs b/src/main.rs
index aef22ca..158e954 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -245,10 +245,9 @@ Up/Down/Left/Right: arrow keys
 /*
 
 TODO:
-- high- and low-pass audio filters
 - DMC audio channel
 - untangle CPU and APU/PPU?
-- better save file organization? if save file is dropped on window, have it load game?
+- better save file organization?
 
 
 Timing notes: