diff --git a/app/src/main/java/com/github/damontecres/dolphin/hilt/AppModule.kt b/app/src/main/java/com/github/damontecres/dolphin/hilt/AppModule.kt
index 1d4f4706..775422da 100644
--- a/app/src/main/java/com/github/damontecres/dolphin/hilt/AppModule.kt
+++ b/app/src/main/java/com/github/damontecres/dolphin/hilt/AppModule.kt
@@ -12,6 +12,7 @@ import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
 import okhttp3.OkHttpClient
 import org.jellyfin.sdk.Jellyfin
+import org.jellyfin.sdk.api.client.util.AuthorizationHeaderBuilder
 import org.jellyfin.sdk.api.okhttp.OkHttpFactory
 import org.jellyfin.sdk.createJellyfin
 import org.jellyfin.sdk.model.ClientInfo
@@ -30,6 +31,27 @@ annotation class StandardOkHttpClient
 @Module
 @InstallIn(SingletonComponent::class)
 object AppModule {
+    @Provides
+    @Singleton
+    fun clientInfo(): ClientInfo =
+        ClientInfo(
+            name = "Dolphin",
+            version = BuildConfig.VERSION_NAME,
+        )
+
+    @Provides
+    @Singleton
+    fun deviceInfo(
+        @ApplicationContext context: Context,
+    ): DeviceInfo =
+        DeviceInfo(
+            id = @SuppressLint("HardwareIds") Settings.Secure.getString(
+                context.contentResolver,
+                Settings.Secure.ANDROID_ID,
+            ),
+            name = Settings.Global.getString(context.contentResolver, Settings.Global.DEVICE_NAME),
+        )
+
     @StandardOkHttpClient
     @Provides
     @Singleton
@@ -46,6 +68,8 @@ object AppModule {
     fun authOkHttpClient(
         serverRepository: ServerRepository,
         @StandardOkHttpClient okHttpClient: OkHttpClient,
+        clientInfo: ClientInfo,
+        deviceInfo: DeviceInfo,
     ) = okHttpClient
         .newBuilder()
         .addInterceptor {
@@ -56,7 +80,13 @@ object AppModule {
                         .newBuilder()
                         .addHeader(
                             "Authorization",
-                            "MediaBrowser Token=\"$token\"",
+                            AuthorizationHeaderBuilder.buildHeader(
+                                clientName = clientInfo.name,
+                                clientVersion = clientInfo.version,
+                                deviceId = deviceInfo.id,
+                                deviceName = deviceInfo.name,
+                                accessToken = serverRepository.currentUser?.accessToken,
+                            ),
                         ).build()
                 }
             it.proceed(newRequest ?: request)
@@ -73,19 +103,13 @@ object AppModule {
     fun jellyfin(
         okHttpFactory: OkHttpFactory,
         @ApplicationContext context: Context,
+        clientInfo: ClientInfo,
+        deviceInfo: DeviceInfo,
     ): Jellyfin =
         createJellyfin {
             this.context = context
-            clientInfo =
-                ClientInfo(
-                    name = "Dolphin",
-                    version = BuildConfig.VERSION_NAME,
-                )
-            deviceInfo =
-                DeviceInfo(
-                    id = @SuppressLint("HardwareIds") Settings.Secure.getString(context.contentResolver, Settings.Secure.ANDROID_ID),
-                    name = Settings.Global.getString(context.contentResolver, Settings.Global.DEVICE_NAME),
-                )
+            this.clientInfo = clientInfo
+            this.deviceInfo = deviceInfo
             apiClientFactory = okHttpFactory
             socketConnectionFactory = okHttpFactory
             minimumServerVersion = Jellyfin.minimumVersion
diff --git a/app/src/main/java/com/github/damontecres/dolphin/ui/playback/Models.kt b/app/src/main/java/com/github/damontecres/dolphin/ui/playback/Models.kt
index d58583b6..cd5d1573 100644
--- a/app/src/main/java/com/github/damontecres/dolphin/ui/playback/Models.kt
+++ b/app/src/main/java/com/github/damontecres/dolphin/ui/playback/Models.kt
@@ -7,6 +7,8 @@ data class SubtitleStream(
     val codec: String?,
     val codecTag: String?,
     val external: Boolean,
+    val forced: Boolean,
+    val default: Boolean,
 ) {
     val displayName: String
         get() =
diff --git a/app/src/main/java/com/github/damontecres/dolphin/ui/playback/PlaybackViewModel.kt b/app/src/main/java/com/github/damontecres/dolphin/ui/playback/PlaybackViewModel.kt
index 1ab4658d..a9ea5e3c 100644
--- a/app/src/main/java/com/github/damontecres/dolphin/ui/playback/PlaybackViewModel.kt
+++ b/app/src/main/java/com/github/damontecres/dolphin/ui/playback/PlaybackViewModel.kt
@@ -39,6 +39,7 @@ import org.jellyfin.sdk.model.api.DeviceProfile
 import org.jellyfin.sdk.model.api.MediaSourceInfo
 import org.jellyfin.sdk.model.api.MediaStreamType
 import org.jellyfin.sdk.model.api.PlaybackInfoDto
+import org.jellyfin.sdk.model.api.SubtitlePlaybackMode
 import org.jellyfin.sdk.model.api.TrickplayInfo
 import org.jellyfin.sdk.model.extensions.ticks
 import org.jellyfin.sdk.model.serializer.toUUIDOrNull
@@ -103,7 +104,6 @@ class PlaybackViewModel
             viewModelScope.launch(ExceptionHandler() + Dispatchers.IO) {
                 val base = item?.data ?: api.userLibraryApi.getItem(itemId).content
                 dto = base
-
                 val title =
                     if (base.type == BaseItemKind.EPISODE) {
                         base.seriesName
@@ -143,6 +143,8 @@ class PlaybackViewModel
                                 it.codec,
                                 it.codecTag,
                                 it.isExternal,
+                                it.isForced,
+                                it.isDefault,
                             )
                         }.orEmpty()
                 val audioStreams =
@@ -160,12 +162,54 @@ class PlaybackViewModel
                             )
                         }?.sortedWith(compareBy<AudioStream> { it.language }.thenByDescending { it.channels })
                         .orEmpty()
-                // TODO use preferences to select audio/subtitle
+
                 // TODO audio selection based on channel layout, etc
-                val subtitleIndex = subtitleStreams.firstOrNull { it.language == "eng" }?.index
+                val audioLanguage = preferences.userConfig.audioLanguagePreference
                 val audioIndex =
-                    audioStreams.firstOrNull { it.language == "eng" }?.index
-                        ?: audioStreams.firstOrNull()?.index
+                    if (audioLanguage != null) {
+                        audioStreams.firstOrNull { it.language == audioLanguage }?.index
+                            ?: audioStreams.firstOrNull()?.index
+                    } else {
+                        audioStreams.firstOrNull()?.index
+                    }
+                val subtitleMode = preferences.userConfig.subtitleMode
+                val subtitleLanguage = preferences.userConfig.subtitleLanguagePreference
+                val subtitleIndex =
+                    when (subtitleMode) {
+                        SubtitlePlaybackMode.ALWAYS -> {
+                            if (subtitleLanguage != null) {
+                                subtitleStreams.firstOrNull { it.language == subtitleLanguage }?.index
+                            } else {
+                                subtitleStreams.firstOrNull()?.index
+                            }
+                        }
+
+                        SubtitlePlaybackMode.ONLY_FORCED ->
+                            if (subtitleLanguage != null) {
+                                subtitleStreams.firstOrNull { it.language == subtitleLanguage && it.forced }?.index
+                            } else {
+                                subtitleStreams.firstOrNull { it.forced }?.index
+                            }
+
+                        SubtitlePlaybackMode.SMART -> {
+                            if (audioLanguage != null && subtitleLanguage != null && audioLanguage != subtitleLanguage) {
+                                subtitleStreams.firstOrNull { it.language == subtitleLanguage }?.index
+                            } else {
+                                null
+                            }
+                        }
+
+                        SubtitlePlaybackMode.DEFAULT -> {
+                            // TODO check for language?
+                            (
+                                subtitleStreams.firstOrNull { it.default && it.forced }
+                                    ?: subtitleStreams.firstOrNull { it.default }
+                                    ?: subtitleStreams.firstOrNull { it.forced }
+                            )?.index
+                        }
+
+                        SubtitlePlaybackMode.NONE -> null
+                    }
 
                 Timber.v("base.mediaStreams=${base.mediaStreams}")
                 Timber.v("subtitleTracks=$subtitleStreams")
@@ -213,7 +257,6 @@ class PlaybackViewModel
                 api.mediaInfoApi
                     .getPostedPlaybackInfo(
                         itemId,
-                        // TODO device profile, etc
                         PlaybackInfoDto(
                             startTimeTicks = null,
                             deviceProfile = deviceProfile,