diff --git a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
index 512e600..5fdda34 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
@@ -525,6 +525,9 @@ public class RecordingActivity extends AppCompatActivity {
     }
 
     void record() {
+        pitch.setOnClickListener(null);
+        pitch.setClickable(false);
+
         state.setText("recording");
 
         silent();
@@ -546,8 +549,8 @@ public class RecordingActivity extends AppCompatActivity {
                 }
 
                 long startTime = System.currentTimeMillis();
-                // start recording after 0.5 sec
-                long goTime = startTime + 500;
+                // start recording after 1 sec or stableRefresh
+                long goTime = startTime + 1000;
 
                 RawSamples rs = null;
                 AudioRecord recorder = null;
@@ -593,7 +596,7 @@ public class RecordingActivity extends AppCompatActivity {
                             break;
                         }
 
-                        if (cur > goTime) {
+                        if (cur > goTime || pitch.stableRefresh()) {
                             rs.write(buffer);
 
                             int pa = getPa(buffer, 0, readSize);
diff --git a/app/src/main/java/com/github/axet/audiorecorder/widgets/PitchView.java b/app/src/main/java/com/github/axet/audiorecorder/widgets/PitchView.java
index 5b25110..d118c98 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/widgets/PitchView.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/widgets/PitchView.java
@@ -55,6 +55,8 @@ public class PitchView extends ViewGroup {
     // pitch length in pn + pitch delimiter length in px
     int pitchSize;
 
+    boolean stableRefresh;
+
     PitchGraphView graph;
     PitchCurrentView current;
 
@@ -544,10 +546,13 @@ public class PitchView extends ViewGroup {
             }
         }
         if (thread == null) {
+            stableRefresh = false;
+
             draw = new Runnable() {
                 @Override
                 public void run() {
                     time = System.currentTimeMillis();
+                    int count = 0;
                     while (!Thread.currentThread().isInterrupted()) {
                         long time = System.currentTimeMillis();
                         draw();
@@ -556,6 +561,10 @@ public class PitchView extends ViewGroup {
                         long delay = UPDATE_SPEED - (cur - time);
 
                         if (delay > 0) {
+                            count++;
+                            if (count > 5) {
+                                stableRefresh = true;
+                            }
                             try {
                                 Thread.sleep(delay);
                             } catch (InterruptedException e) {
@@ -627,4 +636,10 @@ public class PitchView extends ViewGroup {
             thread.start();
         }
     }
+
+    public boolean stableRefresh() {
+        synchronized (this) {
+            return stableRefresh;
+        }
+    }
 }