diff --git a/src/hooks/usePitchDetector.ts b/src/hooks/usePitchDetector.ts
index 9a14379..c798005 100644
--- a/src/hooks/usePitchDetector.ts
+++ b/src/hooks/usePitchDetector.ts
@@ -64,6 +64,7 @@ export function usePitchDetector(active: boolean) {
                 analyzerRef.current = null;
             }
             setIsListening(false);
+            setPitchData(null);
             if (animationRef.current) cancelAnimationFrame(animationRef.current);
         }