diff --git a/examples/include/microw8-api.cwa b/examples/include/microw8-api.cwa
index 5d50279..ff74ebb 100644
--- a/examples/include/microw8-api.cwa
+++ b/examples/include/microw8-api.cwa
@@ -33,6 +33,7 @@ import "env.setCursorPosition" fn setCursorPosition(i32, i32);
 import "env.rectangle_outline" fn rectangle_outline(f32, f32, f32, f32, i32);
 import "env.circle_outline" fn circle_outline(f32, f32, f32, i32);
 import "env.exp" fn exp(f32) -> f32;
+import "env.playNote" fn playNote(i32, i32);
 
 const TIME_MS = 0x40;
 const GAMEPAD = 0x44;
diff --git a/examples/include/microw8-api.wat b/examples/include/microw8-api.wat
index 7024a2d..116b669 100644
--- a/examples/include/microw8-api.wat
+++ b/examples/include/microw8-api.wat
@@ -33,6 +33,7 @@
 (import "env" "rectangle_outline" (func $rectangle_outline (param f32) (param f32) (param f32) (param f32) (param i32)))
 (import "env" "circle_outline" (func $circle_outline (param f32) (param f32) (param f32) (param i32)))
 (import "env" "exp" (func $exp (param f32) (result f32)))
+(import "env" "playNote" (func $playNote (param i32) (param i32)))
 
 ;; to use defines, include this file with a preprocessor
 ;; like gpp (https://logological.org/gpp).
diff --git a/platform/bin/loader.wasm b/platform/bin/loader.wasm
index 12115eb..e5a4279 100644
Binary files a/platform/bin/loader.wasm and b/platform/bin/loader.wasm differ
diff --git a/platform/bin/platform.uw8 b/platform/bin/platform.uw8
index ed7a546..24341b3 100644
Binary files a/platform/bin/platform.uw8 and b/platform/bin/platform.uw8 differ
diff --git a/platform/src/platform.cwa b/platform/src/platform.cwa
index 69e683e..90253a0 100644
--- a/platform/src/platform.cwa
+++ b/platform/src/platform.cwa
@@ -339,6 +339,11 @@ fn printSingleChar(char: i32) {
         return;
     }
 
+    if char == 7 {
+        80?0 = 80?0 ^ 2;
+        return;
+    }
+
     if char == 8 {
         textCursorX = textCursorX - 8;
         if !graphicsText & textCursorX < 0 {
@@ -509,6 +514,26 @@ export fn setCursorPosition(x: i32, y: i32) {
 
 include "ges.cwa"
 
+export fn playNote(channel: i32, note: i32) {
+    (channel * 6)?80 = (channel * 6)?80 & 0xfe ^ if note {
+        (channel * 6)?83 = note & 127;
+        2 | !(note >> 7)
+    } else {
+        0
+    };
+}
+
+data 80 {
+    i8(
+        0x80, 0xc0, 0, 81, 0xa0, 0x50,
+        0xc4, 0, 0, 69, 0x60, 0x40,
+        0x44, 0xb0, 0, 69, 0x90, 0x43,
+        0x4, 0xf0, 0, 69, 0xa4, 0x44,
+        0xff, 0xff,
+        1, 1, 0, 100, 0, 100
+    )
+}
+
 ///////////
 // SETUP //
 ///////////
@@ -565,17 +590,6 @@ start fn setup() {
     randomSeed(random());
 }
 
-data 80 {
-    i8(
-        0, 128, 0, 69, 0x8, 0xc8,
-        0, 128, 0, 69, 0x8, 0xc8,
-        0, 128, 0, 69, 0x8, 0xc8,
-        0, 128, 0, 69, 0x8, 0xc8,
-        0xff, 0xff,
-        1, 1, 0, 100, 0, 100
-    )
-}
-
 data 0x12c78 {
     i32(80)
 }
diff --git a/uw8-tool/src/base_module.rs b/uw8-tool/src/base_module.rs
index c9c042f..1e3a29c 100644
--- a/uw8-tool/src/base_module.rs
+++ b/uw8-tool/src/base_module.rs
@@ -166,6 +166,8 @@ impl BaseModule {
 
         add_function(&mut functions, &type_map, "exp", &[F32], Some(F32));
 
+        add_function(&mut functions, &type_map, "playNote", &[I32, I32], None);
+
         for i in functions.len()..64 {
             add_function(
                 &mut functions,
@@ -291,7 +293,10 @@ impl BaseModule {
 
     pub fn write_as_cwa<P: AsRef<Path>>(&self, path: P) -> Result<()> {
         fn inner(mut file: File, base: &BaseModule) -> Result<()> {
-            writeln!(file, "// MicroW8 APIs, to be `include`d in CurlyWas sources")?;
+            writeln!(
+                file,
+                "// MicroW8 APIs, to be `include`d in CurlyWas sources"
+            )?;
             writeln!(file, "import \"env.memory\" memory({});", base.memory)?;
             writeln!(file)?;
             for &(module, ref name, type_id) in &base.function_imports {
@@ -402,5 +407,5 @@ const CONSTANTS: &[(&str, u32)] = &[
     ("BUTTON_A", 4),
     ("BUTTON_B", 5),
     ("BUTTON_X", 6),
-    ("BUTTON_Y", 7)
+    ("BUTTON_Y", 7),
 ];