diff --git a/audio/core/all-versions/default/StreamOut.cpp b/audio/core/all-versions/default/StreamOut.cpp
index ffd3b6b..21d439c 100644
--- a/audio/core/all-versions/default/StreamOut.cpp
+++ b/audio/core/all-versions/default/StreamOut.cpp
@@ -658,32 +658,65 @@
 
 #if MAJOR_VERSION >= 6
 Return<void> StreamOut::getDualMonoMode(getDualMonoMode_cb _hidl_cb) {
-    _hidl_cb(Result::NOT_SUPPORTED, DualMonoMode::OFF);
+    audio_dual_mono_mode_t mode = AUDIO_DUAL_MONO_MODE_OFF;
+    Result retval = mStream->get_dual_mono_mode != nullptr
+                            ? Stream::analyzeStatus("get_dual_mono_mode",
+                                                    mStream->get_dual_mono_mode(mStream, &mode))
+                            : Result::NOT_SUPPORTED;
+    _hidl_cb(retval, DualMonoMode(mode));
     return Void();
 }
 
-Return<Result> StreamOut::setDualMonoMode(DualMonoMode /*mode*/) {
-    return Result::NOT_SUPPORTED;
+Return<Result> StreamOut::setDualMonoMode(DualMonoMode mode) {
+    return mStream->set_dual_mono_mode != nullptr
+                   ? Stream::analyzeStatus(
+                             "set_dual_mono_mode",
+                             mStream->set_dual_mono_mode(mStream,
+                                                         static_cast<audio_dual_mono_mode_t>(mode)))
+                   : Result::NOT_SUPPORTED;
 }
 
 Return<void> StreamOut::getAudioDescriptionMixLevel(getAudioDescriptionMixLevel_cb _hidl_cb) {
-    _hidl_cb(Result::NOT_SUPPORTED, -std::numeric_limits<float>::infinity());
+    float leveldB = -std::numeric_limits<float>::infinity();
+    Result retval = mStream->get_audio_description_mix_level != nullptr
+                            ? Stream::analyzeStatus(
+                                      "get_audio_description_mix_level",
+                                      mStream->get_audio_description_mix_level(mStream, &leveldB))
+                            : Result::NOT_SUPPORTED;
+    _hidl_cb(retval, leveldB);
     return Void();
 }
 
-Return<Result> StreamOut::setAudioDescriptionMixLevel(float /*leveldB*/) {
-    return Result::NOT_SUPPORTED;
+Return<Result> StreamOut::setAudioDescriptionMixLevel(float leveldB) {
+    return mStream->set_audio_description_mix_level != nullptr
+                   ? Stream::analyzeStatus(
+                             "set_audio_description_mix_level",
+                             mStream->set_audio_description_mix_level(mStream, leveldB))
+                   : Result::NOT_SUPPORTED;
 }
 
 Return<void> StreamOut::getPlaybackRateParameters(getPlaybackRateParameters_cb _hidl_cb) {
-    _hidl_cb(Result::NOT_SUPPORTED,
-             // Same as AUDIO_PLAYBACK_RATE_INITIALIZER
-             PlaybackRate{1.0f, 1.0f, TimestretchMode::DEFAULT, TimestretchFallbackMode::FAIL});
+    audio_playback_rate_t rate = AUDIO_PLAYBACK_RATE_INITIALIZER;
+    Result retval =
+            mStream->get_playback_rate_parameters != nullptr
+                    ? Stream::analyzeStatus("get_playback_rate_parameters",
+                                            mStream->get_playback_rate_parameters(mStream, &rate))
+                    : Result::NOT_SUPPORTED;
+    _hidl_cb(retval,
+             PlaybackRate{rate.mSpeed, rate.mPitch, static_cast<TimestretchMode>(rate.mStretchMode),
+                          static_cast<TimestretchFallbackMode>(rate.mFallbackMode)});
     return Void();
 }
 
-Return<Result> StreamOut::setPlaybackRateParameters(const PlaybackRate& /*playbackRate*/) {
-    return Result::NOT_SUPPORTED;
+Return<Result> StreamOut::setPlaybackRateParameters(const PlaybackRate& playbackRate) {
+    audio_playback_rate_t rate = {
+            playbackRate.speed, playbackRate.pitch,
+            static_cast<audio_timestretch_stretch_mode_t>(playbackRate.timestretchMode),
+            static_cast<audio_timestretch_fallback_mode_t>(playbackRate.fallbackMode)};
+    return mStream->set_playback_rate_parameters != nullptr
+                   ? Stream::analyzeStatus("set_playback_rate_parameters",
+                                           mStream->set_playback_rate_parameters(mStream, &rate))
+                   : Result::NOT_SUPPORTED;
 }
 
 Return<Result> StreamOut::setEventCallback(const sp<IStreamOutEventCallback>& callback) {