diff --git a/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt
index 5a4e62e4..30e56c4f 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/AudioActivity.kt
@@ -17,7 +17,6 @@ class AudioActivity : AppCompatActivity() {
     private lateinit var opusBitRate: EditText
     private lateinit var opusPacketLoss: EditText
     private lateinit var aec: CheckBox
-    private lateinit var extendedFilter: CheckBox
 
     private var save = false
     private var reload = false
@@ -25,7 +24,6 @@ class AudioActivity : AppCompatActivity() {
     private var oldOpusBitrate = ""
     private var oldOpusPacketLoss = ""
     private var oldAec = false
-    private var oldExtendedFilter = false
     private val audioModules = listOf("opus", "amr", "g722", "g7221", "g726", "g729", "g711")
 
     override fun onCreate(savedInstanceState: Bundle?) {
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Config.kt b/app/src/main/kotlin/com/tutpro/baresip/Config.kt
index 9127815b..8514e1cc 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Config.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Config.kt
@@ -46,10 +46,6 @@ object Config {
             config = "${config}opus_sprop_stereo no\n"
         }
 
-        if (!config.contains("webrtc_aec_extended_filter")) {
-            config = "${config}webrtc_aec_extended_filter yes\n"
-        }
-
         if (!config.contains("log_level")) {
             config = "${config}log_level 2\n"
             Log.logLevel = Log.LogLevel.WARN