diff --git a/core/jni/android_media_AudioSystem.cpp b/core/jni/android_media_AudioSystem.cpp
index fc2b7f66e77a7..686a91901b5f8 100644
--- a/core/jni/android_media_AudioSystem.cpp
+++ b/core/jni/android_media_AudioSystem.cpp
@@ -2242,6 +2242,12 @@ android_media_AudioSystem_setAllowedCapturePolicy(JNIEnv *env, jobject thiz, jin
     return AudioSystem::setAllowedCapturePolicy(uid, flags);
 }
 
+static jint
+android_media_AudioSystem_setRttEnabled(JNIEnv *env, jobject thiz, jboolean enabled)
+{
+    return (jint) check_AudioSystem_Command(AudioSystem::setRttEnabled(enabled));
+}
+
 // ----------------------------------------------------------------------------
 
 static const JNINativeMethod gMethods[] = {
@@ -2319,6 +2325,7 @@ static const JNINativeMethod gMethods[] = {
     {"getHwOffloadEncodingFormatsSupportedForA2DP", "(Ljava/util/ArrayList;)I",
                     (void*)android_media_AudioSystem_getHwOffloadEncodingFormatsSupportedForA2DP},
     {"setAllowedCapturePolicy", "(II)I", (void *)android_media_AudioSystem_setAllowedCapturePolicy},
+    {"setRttEnabled",       "(Z)I",     (void *)android_media_AudioSystem_setRttEnabled},
 };
 
 static const JNINativeMethod gEventHandlerMethods[] = {
diff --git a/media/java/android/media/AudioSystem.java b/media/java/android/media/AudioSystem.java
index fde0e640d92c4..53bc65d711b0d 100644
--- a/media/java/android/media/AudioSystem.java
+++ b/media/java/android/media/AudioSystem.java
@@ -24,7 +24,6 @@ import android.content.Context;
 import android.content.pm.PackageManager;
 import android.media.audiofx.AudioEffect;
 import android.media.audiopolicy.AudioMix;
-import android.os.Build;
 import android.util.Log;
 
 import java.util.ArrayList;
@@ -981,6 +980,8 @@ public class AudioSystem
     public static native boolean getMasterMono();
     /** @hide enables or disables the master mono mode. */
     public static native int setMasterMono(boolean mono);
+    /** @hide enables or disables the RTT mode. */
+    public static native int setRttEnabled(boolean enabled);
 
     /** @hide returns master balance value in range -1.f -> 1.f, where 0.f is dead center. */
     @TestApi
diff --git a/services/core/java/com/android/server/audio/AudioService.java b/services/core/java/com/android/server/audio/AudioService.java
index e43c548eb66ab..5ae51138f7211 100644
--- a/services/core/java/com/android/server/audio/AudioService.java
+++ b/services/core/java/com/android/server/audio/AudioService.java
@@ -1016,6 +1016,7 @@ public class AudioService extends IAudioService.Stub
             sendEncodedSurroundMode(mContentResolver, "onAudioServerDied");
             sendEnabledSurroundFormats(mContentResolver, true);
             updateAssistantUId(true);
+            updateRttEanbled(mContentResolver);
         }
         synchronized (mAccessibilityServiceUidsLock) {
             AudioSystem.setA11yServicesUids(mAccessibilityServiceUids);
@@ -1480,6 +1481,12 @@ public class AudioService extends IAudioService.Stub
         }
     }
 
+    private void updateRttEanbled(ContentResolver cr) {
+        final boolean rttEnabled = Settings.Secure.getIntForUser(cr,
+                    Settings.Secure.RTT_CALLING_MODE, 0, UserHandle.USER_CURRENT) != 0;
+        AudioSystem.setRttEnabled(rttEnabled);
+    }
+
     private void readPersistedSettings() {
         final ContentResolver cr = mContentResolver;
 
@@ -1524,6 +1531,7 @@ public class AudioService extends IAudioService.Stub
             sendEncodedSurroundMode(cr, "readPersistedSettings");
             sendEnabledSurroundFormats(cr, true);
             updateAssistantUId(true);
+            updateRttEanbled(cr);
         }
 
         mMuteAffectedStreams = System.getIntForUser(cr,
@@ -5502,6 +5510,8 @@ public class AudioService extends IAudioService.Stub
 
             mContentResolver.registerContentObserver(Settings.Secure.getUriFor(
                     Settings.Secure.VOICE_INTERACTION_SERVICE), false, this);
+            mContentResolver.registerContentObserver(Settings.Secure.getUriFor(
+                    Settings.Secure.RTT_CALLING_MODE), false, this);
         }
 
         @Override
@@ -5525,6 +5535,7 @@ public class AudioService extends IAudioService.Stub
                 updateEncodedSurroundOutput();
                 sendEnabledSurroundFormats(mContentResolver, mSurroundModeChanged);
                 updateAssistantUId(false);
+                updateRttEanbled(mContentResolver);
             }
         }