diff --git a/feature/voiceburst/build.gradle.kts b/feature/voiceburst/build.gradle.kts
index 1e790269f..bf07655ca 100644
--- a/feature/voiceburst/build.gradle.kts
+++ b/feature/voiceburst/build.gradle.kts
@@ -22,15 +22,18 @@ plugins {
     alias(libs.plugins.meshtastic.kotlinx.serialization)
 }
 
-// ─── Codec2 JNI detection ─────────────────────────────────────────
-val codec2SoArm64 = File(projectDir, "src/androidMain/jniLibs/arm64-v8a/libcodec2.so")
-val codec2JniArm64 = File(projectDir, "src/androidMain/jniLibs/arm64-v8a/libcodec2_jni.so")
-val codec2Available = codec2SoArm64.exists() && codec2JniArm64.exists()
+// --- Codec2 JNI detection ---------------------------------------------------
+val codec2SoArm64   = File(projectDir, "src/androidMain/jniLibs/arm64-v8a/libcodec2.so")
+val codec2JniArm64  = File(projectDir, "src/androidMain/jniLibs/arm64-v8a/libcodec2_jni.so")
+val codec2SoX86_64  = File(projectDir, "src/androidMain/jniLibs/x86_64/libcodec2.so")
+val codec2JniX86_64 = File(projectDir, "src/androidMain/jniLibs/x86_64/libcodec2_jni.so")
+val codec2Available = (codec2SoArm64.exists() && codec2JniArm64.exists()) ||
+                      (codec2SoX86_64.exists() && codec2JniX86_64.exists())
 
 if (codec2Available) {
-    logger.lifecycle(":feature:voiceburst — libcodec2.so + libcodec2_jni.so trovate")
+    logger.lifecycle(":feature:voiceburst -- libcodec2.so + libcodec2_jni.so found")
 } else {
-    logger.lifecycle(":feature:voiceburst — .so assenti → stub mode (esegui scripts/build_codec2.sh)")
+    logger.lifecycle(":feature:voiceburst -- .so not found -> stub mode (run scripts/build_codec2.sh)")
 }
 
 kotlin {
@@ -73,6 +76,6 @@ kotlin {
     }
 }
 
-// ─── NESSUN externalNativeBuild ───────────────────────────────────
-// Le .so prebuilt in jniLibs/ vengono incluse automaticamente da AGP.
-// Il JNI wrapper è compilato da scripts/build_codec2.sh.
\ No newline at end of file
+// No externalNativeBuild block needed.
+// Prebuilt .so files in jniLibs/ are packaged automatically by AGP.
+// The JNI wrapper is compiled separately via scripts/build_codec2.sh.
diff --git a/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/audio/AndroidAudioRecorder.kt b/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/audio/AndroidAudioRecorder.kt
index 9406ff9e3..d53f93074 100644
--- a/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/audio/AndroidAudioRecorder.kt
+++ b/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/audio/AndroidAudioRecorder.kt
@@ -143,7 +143,7 @@ class AndroidAudioRecorder(
                 Logger.e(e, tag = TAG) { "Error during recording" }
                 onError(e)
             } finally {
-                record.stop()
+                runCatching { record.stop() } // guard against IllegalStateException on early-stop
                 record.release()
                 audioRecord = null
                 keepRecording = false
diff --git a/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/repository/AndroidVoiceBurstRepository.kt b/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/repository/AndroidVoiceBurstRepository.kt
index 6e1c0ff54..8fd7c336e 100644
--- a/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/repository/AndroidVoiceBurstRepository.kt
+++ b/feature/voiceburst/src/androidMain/kotlin/org/meshtastic/feature/voiceburst/repository/AndroidVoiceBurstRepository.kt
@@ -71,7 +71,7 @@ class AndroidVoiceBurstRepository(
     // ─── Feature flag ─────────────────────────────────────────────────────────
 
     private val featureEnabledFlow = dataStore.data
-        .map { prefs -> prefs[KEY_FEATURE_ENABLED] ?: true } // Default ON
+        .map { prefs -> prefs[KEY_FEATURE_ENABLED] ?: false } // Default OFF (experimental opt-in)
 
     override val isFeatureEnabled: StateFlow<Boolean> =
         featureEnabledFlow.stateIn(