diff --git a/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt
index 682932a1..26ece40c 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt
@@ -93,7 +93,7 @@ class AudioActivity : AppCompatActivity() {
             }
         }
 
-        if (!BaresipService.agc) {
+        if (!BaresipService.agcAvailable) {
             micGain = binding.MicGain
             oldMicGain = Config.variable("augain")
             micGain.setText(oldMicGain)
@@ -148,7 +148,7 @@ class AudioActivity : AppCompatActivity() {
         oldOpusPacketLoss = Config.variable("opus_packet_loss")
         opusPacketLoss.setText(oldOpusPacketLoss)
 
-        if (!BaresipService.aec) {
+        if (!BaresipService.aecAvailable) {
             aec = binding.Aec
             oldAec = modules.contains("webrtc_aecm.so")
             aec.isChecked = oldAec
@@ -211,7 +211,7 @@ class AudioActivity : AppCompatActivity() {
                 }
 
                 var gain = "1.0"
-                if (!BaresipService.agc) {
+                if (!BaresipService.agcAvailable) {
                     gain = micGain.text.toString().trim()
                     if (!gain.contains("."))
                         gain = "$gain.0"
@@ -301,7 +301,7 @@ class AudioActivity : AppCompatActivity() {
                     save = true
                 }
 
-                if (!BaresipService.aec) {
+                if (!BaresipService.aecAvailable) {
                     if (aec.isChecked != oldAec) {
                         if (aec.isChecked) {
                             Config.addVariable("module", "webrtc_aecm.so")
diff --git a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
index c2078430..eaf78b5e 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
@@ -441,7 +441,8 @@ class BaresipService: Service() {
                 activeNetwork = cm.activeNetwork
                 Log.i(TAG, "Active network: $activeNetwork")
 
-                Log.d(TAG, "AEC/AGC/NS available = $aec/$agc/$ns")
+                Log.d(TAG, "AEC/AGC/NS available = " +
+                        "$aecAvailable/$agcAvailable/$nsAvailable")
 
                 val userAgent = Config.variable("user_agent")
                 Thread {
@@ -628,14 +629,8 @@ class BaresipService: Service() {
         }
 
         if (ev[0] == "recorder sessionid") {
-            val sessionId = ev[1].toInt()
-            Log.d(TAG, "got recorder sessionid $sessionId")
-            if (aec)
-                AcousticEchoCanceler.create(sessionId)
-            if (agc)
-                 AutomaticGainControl.create(sessionId)
-            if (ns)
-                NoiseSuppressor.create(sessionId)
+            recorderSessionId = ev[1].toInt()
+            Log.d(TAG, "got recorder sessionid $recorderSessionId")
             return
         }
 
@@ -834,6 +829,37 @@ class BaresipService: Service() {
                         if (am.mode != MODE_IN_COMMUNICATION)
                             am.mode = MODE_IN_COMMUNICATION
                         call!!.status = "connected"
+                        if (recorderSessionId != 0) {
+                            if (aecAvailable) {
+                                val aec = AcousticEchoCanceler.create(recorderSessionId)
+                                if (aec != null)
+                                    if (!aec.getEnabled()) {
+                                        aec.setEnabled(true)
+                                        if (aec.getEnabled())
+                                            Log.d(TAG, "aec is enabled")
+                                    }
+                            }
+                            if (agcAvailable) {
+                                val agc = AutomaticGainControl.create(recorderSessionId)
+                                if (agc != null)
+                                    if (!agc.getEnabled()) {
+                                        agc.setEnabled(true)
+                                        if (agc.getEnabled())
+                                            Log.d(TAG, "agc is enabled")
+                                    }
+                            }
+                            if (nsAvailable) {
+                                val ns = NoiseSuppressor.create(recorderSessionId)
+                                if (ns != null) {
+                                    if (!ns.getEnabled()) {
+                                        ns.setEnabled(true)
+                                        if (ns.getEnabled())
+                                            Log.d(TAG, "ns is enabled")
+                                    }
+                                }
+                            }
+                            recorderSessionId = 0
+                        }
                         call.onhold = false
                         if (ua.account.callHistory)
                             call.startTime = GregorianCalendar()
@@ -1574,10 +1600,11 @@ class BaresipService: Service() {
         // <aor, password> of those accounts that have auth username without auth password
         val aorPasswords = mutableMapOf<String, String>()
         var audioFocusRequest: AudioFocusRequestCompat? = null
-        var aec = AcousticEchoCanceler.isAvailable()
-        var agc = AutomaticGainControl.isAvailable()
-        private val ns = NoiseSuppressor.isAvailable()
+        var aecAvailable = AcousticEchoCanceler.isAvailable()
+        var agcAvailable = AutomaticGainControl.isAvailable()
+        private val nsAvailable = NoiseSuppressor.isAvailable()
         private var btAdapter: BluetoothAdapter? = null
+        private var recorderSessionId = 0
 
         fun requestAudioFocus(ctx: Context): Boolean  {
             Log.d(TAG, "Requesting audio focus")
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Config.kt b/app/src/main/kotlin/com/tutpro/baresip/Config.kt
index b4676174..1bd684c2 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Config.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Config.kt
@@ -20,7 +20,7 @@ object Config {
         if (!File(configPath).exists()) {
             for (module in AudioActivity.audioModules)
                 config = "${config}module ${module}.so\n"
-            if (!BaresipService.aec)
+            if (!BaresipService.aecAvailable)
                 config = "${config}module webrtc_aecm.so\n"
             previousConfig = config
         } else {
@@ -155,11 +155,11 @@ object Config {
             if ("${module}.so" in previousModules)
                 config = "${config}module ${module}.so\n"
 
-        if (!BaresipService.aec && "webrtc_aecm.so" in previousModules)
+        if (!BaresipService.aecAvailable && "webrtc_aecm.so" in previousModules)
             config = "${config}module webrtc_aecm.so\n"
 
         val micGain = previousVariable("augain")
-        config = if (BaresipService.agc || micGain == ""  || micGain == "1.0")
+        config = if (BaresipService.agcAvailable || micGain == ""  || micGain == "1.0")
             "${config}augain 1.0\n"
         else
             "${config}module augain.so\naugain $micGain\n"