diff --git a/src/syn.rs b/src/syn.rs
index 83cb2c2..f3bcde2 100644
--- a/src/syn.rs
+++ b/src/syn.rs
@@ -70,20 +70,6 @@ impl Syn {
         };
     }
 
-    fn tone_off(&mut self, ch: i32, b: tone::Tone) {
-        match self {
-            Syn::Real(syn) => syn.note_off(ch, b.i32()),
-            Syn::Text { m, .. } => {
-                match m.get_mut(&ch) {
-                    Some(m) => {
-                        m.remove(&b.i32());
-                    }
-                    None => {}
-                };
-            }
-        };
-    }
-
     pub fn render(&mut self, a: &mut [f32], b: &mut [f32]) {
         match self {
             Syn::Real(syn) => syn.render(a, b),
@@ -106,8 +92,6 @@ mod test {
         syn.tone_on(0, tone::new("c"));
         syn.tone_on(0, tone::new("d"));
 
-        syn.tone_off(0, tone::new("d"));
-
         let mut buffer1 = Vec::<f32>::new();
         let mut buffer2 = Vec::<f32>::new();
         syn.render(&mut buffer1, &mut buffer2);
@@ -120,8 +104,6 @@ mod test {
         syn.tone_on(0, tone::new("c"));
         syn.tone_on(0, tone::new("d"));
 
-        syn.tone_off(0, tone::new("d"));
-
         let mut buffer1 = Vec::<f32>::new();
         let mut buffer2 = Vec::<f32>::new();
         syn.render(&mut buffer1, &mut buffer2);