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 f0a244d..84438fd 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
@@ -375,17 +375,16 @@ public class RecordingActivity extends AppCompatActivity {
 
     void pauseButton() {
         if (thread != null) {
-            receiver.pause = false;
+            receiver.errors = false;
             stopRecording(getString(R.string.recording_status_pause));
             receiver.stopBluetooth();
             headset(true, false);
         } else {
-            receiver.pause = true;
+            receiver.errors = true;
             receiver.stopBluetooth(); // reset bluetooth
             editCut();
-            if (receiver.isRecordingReady()) {
+            if (receiver.isRecordingReady())
                 startRecording();
-            }
         }
     }
 
diff --git a/app/src/main/java/com/github/axet/audiorecorder/app/MainApplication.java b/app/src/main/java/com/github/axet/audiorecorder/app/MainApplication.java
index 631ce33..ba3eb32 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/app/MainApplication.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/app/MainApplication.java
@@ -1,7 +1,11 @@
 package com.github.axet.audiorecorder.app;
 
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.os.Build;
 import android.support.v7.preference.PreferenceManager;
 
+import com.github.axet.audiolibrary.encoders.FormatOGG;
 import com.github.axet.audiorecorder.R;
 
 public class MainApplication extends com.github.axet.audiolibrary.app.MainApplication {
@@ -22,7 +26,19 @@ public class MainApplication extends com.github.axet.audiolibrary.app.MainApplic
     @Override
     public void onCreate() {
         super.onCreate();
-        PreferenceManager.setDefaultValues(this, R.xml.pref_general, false);
+        final SharedPreferences defaultValueSp = getSharedPreferences(PreferenceManager.KEY_HAS_SET_DEFAULT_VALUES, Context.MODE_PRIVATE);
+        if (!defaultValueSp.getBoolean(PreferenceManager.KEY_HAS_SET_DEFAULT_VALUES, false)) {
+            PreferenceManager.setDefaultValues(this, R.xml.pref_general, false);
+            if (!FormatOGG.supported(this)) {
+                SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(this);
+                SharedPreferences.Editor edit = shared.edit();
+                if (Build.VERSION.SDK_INT >= 18)
+                    edit.putString(MainApplication.PREFERENCE_ENCODING, "m4a");
+                else
+                    edit.putString(MainApplication.PREFERENCE_ENCODING, "flac");
+                edit.commit();
+            }
+        }
     }
 
 }
diff --git a/app/src/main/java/com/github/axet/audiorecorder/services/BluetoothReceiver.java b/app/src/main/java/com/github/axet/audiorecorder/services/BluetoothReceiver.java
index bd64c8f..fef2355 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/services/BluetoothReceiver.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/services/BluetoothReceiver.java
@@ -24,7 +24,7 @@ public class BluetoothReceiver extends BroadcastReceiver {
     public boolean bluetoothSource = false; // are we using bluetooth source recording
     public boolean bluetoothStart = false; // did we start already?
     public boolean pausedByBluetooth = false;
-    public boolean pause = false; // resumed recording by user, show error only on user actions
+    public boolean errors = false; // show errors
     public boolean connecting = false;
 
     public Runnable connected = new Runnable() {
@@ -43,8 +43,8 @@ public class BluetoothReceiver extends BroadcastReceiver {
         public void run() {
             handler.removeCallbacks(connected);
             onDisconnected();
-            if (pause) {
-                pause = false;
+            if (errors) {
+                errors = false;
                 Toast.makeText(context, R.string.hold_by_bluetooth, Toast.LENGTH_SHORT).show();
             }
             if (connecting) {
@@ -90,12 +90,16 @@ public class BluetoothReceiver extends BroadcastReceiver {
         }
     }
 
-    boolean startBluetooth() {
+    public void onStartBluetoothSco() {
+    }
+
+    public boolean startBluetooth() {
         AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
         if (am.isBluetoothScoAvailableOffCall()) {
             if (!bluetoothStart) {
                 am.startBluetoothSco();
                 bluetoothStart = true;
+                onStartBluetoothSco();
             }
             if (!am.isBluetoothScoOn()) {
                 pausedByBluetooth = true;