diff --git a/step-sequencer/index.html b/step-sequencer/index.html
index 678b7a8..4e1d5a6 100644
--- a/step-sequencer/index.html
+++ b/step-sequencer/index.html
@@ -222,7 +222,6 @@ <h2>DTMF</h2>
       );
 
       // Expose attack time & release time
-      const sweepLength = 2;
       function playSweep(time) {
         const osc = new OscillatorNode(audioCtx, {
           frequency: 380,
@@ -236,12 +235,12 @@ <h2>DTMF</h2>
         sweepEnv.gain.linearRampToValueAtTime(1, time + attackTime);
         sweepEnv.gain.linearRampToValueAtTime(
           0,
-          time + sweepLength - releaseTime
+          time + attackTime + releaseTime
         );
 
         osc.connect(sweepEnv).connect(audioCtx.destination);
         osc.start(time);
-        osc.stop(time + sweepLength);
+        osc.stop(time + attackTime + releaseTime);
       }
 
       // Expose frequency & frequency modulation