diff --git a/src/classes/SoundEvent.ts b/src/classes/SoundEvent.ts
index 40d9e5a..33eccd9 100644
--- a/src/classes/SoundEvent.ts
+++ b/src/classes/SoundEvent.ts
@@ -255,7 +255,7 @@ export class SoundEvent extends AudibleEvent {
     return superdough(
       this.values,
       this.app.clock.pulse_duration,
-      this.values.dur
+      this.values.dur || 0.5
     );
   };
 }