diff --git a/src/main.rs b/src/main.rs
index 3029362..7617bab 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -49,24 +49,28 @@ fn main() {
 
 enum Syn {
     Real(Synthesizer),
+    Text,
 }
 
 impl Syn {
     fn note_on(&mut self, a: i32, b: i32, c: i32) {
         match self {
             Syn::Real(syn) => syn.note_on(a, b, c),
+            Syn::Text => eprintln!("note_on({:?}, {:?}, {:?})", a, b, c),
         };
     }
 
     fn note_off(&mut self, a: i32, b: i32) {
         match self {
             Syn::Real(syn) => syn.note_off(a, b),
+            Syn::Text => eprintln!("note_off({:?}, {:?})", a, b),
         };
     }
 
     fn render(&mut self, a: &mut [f32], b: &mut [f32]) {
         match self {
             Syn::Real(syn) => syn.render(a, b),
+            Syn::Text => eprintln!("render(..., ...)"),
         };
     }
 }