diff --git a/apps/stetho/stetho.js b/apps/stetho/stetho.js
index 66a5bf7aa..2d7bb645d 100644
--- a/apps/stetho/stetho.js
+++ b/apps/stetho/stetho.js
@@ -11,7 +11,7 @@ var hrm;
 var SPEAKER_PIN = D18;
 function freq(f) {
   if (f===0) digitalWrite(SPEAKER_PIN, 0);
-   else analogWrite(SPEAKER_PIN, 0.5, {freq: f});
+   else analogWrite(SPEAKER_PIN, 1.0, {freq: f});
  }