diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index 6595324..e8c1693 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -848,7 +848,7 @@
 }
 
 StreamInHwGainHelper::StreamInHwGainHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())), mHwGains(mChannelCount, 0.0f) {}
 
 ndk::ScopedAStatus StreamInHwGainHelper::getHwGainImpl(std::vector<float>* _aidl_return) {
     *_aidl_return = mHwGains;
@@ -979,7 +979,8 @@
 }
 
 StreamOutHwVolumeHelper::StreamOutHwVolumeHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())),
+      mHwVolumes(mChannelCount, 0.0f) {}
 
 ndk::ScopedAStatus StreamOutHwVolumeHelper::getHwVolumeImpl(std::vector<float>* _aidl_return) {
     *_aidl_return = mHwVolumes;
diff --git a/audio/aidl/default/alsa/Mixer.cpp b/audio/aidl/default/alsa/Mixer.cpp
index 126c033..e72502b 100644
--- a/audio/aidl/default/alsa/Mixer.cpp
+++ b/audio/aidl/default/alsa/Mixer.cpp
@@ -20,9 +20,24 @@
 #define LOG_TAG "AHAL_AlsaMixer"
 #include <android-base/logging.h>
 #include <android/binder_status.h>
+#include <error/expected_utils.h>
 
 #include "Mixer.h"
 
+namespace ndk {
+
+// This enables use of 'error/expected_utils' for ScopedAStatus.
+
+inline bool errorIsOk(const ScopedAStatus& s) {
+    return s.isOk();
+}
+
+inline std::string errorToString(const ScopedAStatus& s) {
+    return s.getDescription();
+}
+
+}  // namespace ndk
+
 namespace aidl::android::hardware::audio::core::alsa {
 
 // static
@@ -93,6 +108,36 @@
     }
 }
 
+ndk::ScopedAStatus Mixer::getMasterMute(bool* muted) {
+    return getMixerControlMute(MASTER_SWITCH, muted);
+}
+
+ndk::ScopedAStatus Mixer::getMasterVolume(float* volume) {
+    return getMixerControlVolume(MASTER_VOLUME, volume);
+}
+
+ndk::ScopedAStatus Mixer::getMicGain(float* gain) {
+    return getMixerControlVolume(MIC_GAIN, gain);
+}
+
+ndk::ScopedAStatus Mixer::getMicMute(bool* muted) {
+    return getMixerControlMute(MIC_SWITCH, muted);
+}
+
+ndk::ScopedAStatus Mixer::getVolumes(std::vector<float>* volumes) {
+    struct mixer_ctl* mctl;
+    RETURN_STATUS_IF_ERROR(findControl(Mixer::HW_VOLUME, &mctl));
+    std::vector<int> percents;
+    std::lock_guard l(mMixerAccess);
+    if (int err = getMixerControlPercent(mctl, &percents); err != 0) {
+        LOG(ERROR) << __func__ << ": failed to get volume, err=" << err;
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
+    std::transform(percents.begin(), percents.end(), std::back_inserter(*volumes),
+                   [](int percent) -> float { return std::clamp(percent / 100.0f, 0.0f, 1.0f); });
+    return ndk::ScopedAStatus::ok();
+}
+
 ndk::ScopedAStatus Mixer::setMasterMute(bool muted) {
     return setMixerControlMute(MASTER_SWITCH, muted);
 }
@@ -110,35 +155,70 @@
 }
 
 ndk::ScopedAStatus Mixer::setVolumes(const std::vector<float>& volumes) {
-    if (!isValid()) {
-        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
-    }
-    auto it = mMixerControls.find(Mixer::HW_VOLUME);
-    if (it == mMixerControls.end()) {
-        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
-    }
+    struct mixer_ctl* mctl;
+    RETURN_STATUS_IF_ERROR(findControl(Mixer::HW_VOLUME, &mctl));
     std::vector<int> percents;
     std::transform(
             volumes.begin(), volumes.end(), std::back_inserter(percents),
             [](float volume) -> int { return std::floor(std::clamp(volume, 0.0f, 1.0f) * 100); });
     std::lock_guard l(mMixerAccess);
-    if (int err = setMixerControlPercent(it->second, percents); err != 0) {
+    if (int err = setMixerControlPercent(mctl, percents); err != 0) {
         LOG(ERROR) << __func__ << ": failed to set volume, err=" << err;
         return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
     }
     return ndk::ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Mixer::setMixerControlMute(Mixer::Control ctl, bool muted) {
+ndk::ScopedAStatus Mixer::findControl(Control ctl, struct mixer_ctl** result) {
     if (!isValid()) {
         return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
     }
-    auto it = mMixerControls.find(ctl);
-    if (it == mMixerControls.end()) {
-        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+    if (auto it = mMixerControls.find(ctl); it != mMixerControls.end()) {
+        *result = it->second;
+        return ndk::ScopedAStatus::ok();
     }
+    return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus Mixer::getMixerControlMute(Control ctl, bool* muted) {
+    struct mixer_ctl* mctl;
+    RETURN_STATUS_IF_ERROR(findControl(ctl, &mctl));
     std::lock_guard l(mMixerAccess);
-    if (int err = setMixerControlValue(it->second, muted ? 0 : 1); err != 0) {
+    std::vector<int> mutedValues;
+    if (int err = getMixerControlValues(mctl, &mutedValues); err != 0) {
+        LOG(ERROR) << __func__ << ": failed to get " << ctl << ", err=" << err;
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
+    if (mutedValues.empty()) {
+        LOG(ERROR) << __func__ << ": got no values for " << ctl;
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
+    *muted = mutedValues[0] != 0;
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Mixer::getMixerControlVolume(Control ctl, float* volume) {
+    struct mixer_ctl* mctl;
+    RETURN_STATUS_IF_ERROR(findControl(ctl, &mctl));
+    std::lock_guard l(mMixerAccess);
+    std::vector<int> percents;
+    if (int err = getMixerControlPercent(mctl, &percents); err != 0) {
+        LOG(ERROR) << __func__ << ": failed to get " << ctl << ", err=" << err;
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
+    if (percents.empty()) {
+        LOG(ERROR) << __func__ << ": got no values for " << ctl;
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
+    *volume = std::clamp(percents[0] / 100.0f, 0.0f, 1.0f);
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Mixer::setMixerControlMute(Control ctl, bool muted) {
+    struct mixer_ctl* mctl;
+    RETURN_STATUS_IF_ERROR(findControl(ctl, &mctl));
+    std::lock_guard l(mMixerAccess);
+    if (int err = setMixerControlValue(mctl, muted ? 0 : 1); err != 0) {
         LOG(ERROR) << __func__ << ": failed to set " << ctl << " to " << muted << ", err=" << err;
         return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
     }
@@ -146,54 +226,72 @@
 }
 
 ndk::ScopedAStatus Mixer::setMixerControlVolume(Control ctl, float volume) {
-    if (!isValid()) {
-        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
-    }
-    auto it = mMixerControls.find(ctl);
-    if (it == mMixerControls.end()) {
-        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
-    }
+    struct mixer_ctl* mctl;
+    RETURN_STATUS_IF_ERROR(findControl(ctl, &mctl));
     volume = std::clamp(volume, 0.0f, 1.0f);
     std::lock_guard l(mMixerAccess);
-    if (int err = setMixerControlPercent(it->second, std::floor(volume * 100)); err != 0) {
+    if (int err = setMixerControlPercent(mctl, std::floor(volume * 100)); err != 0) {
         LOG(ERROR) << __func__ << ": failed to set " << ctl << " to " << volume << ", err=" << err;
         return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
     }
     return ndk::ScopedAStatus::ok();
 }
 
+int Mixer::getMixerControlPercent(struct mixer_ctl* ctl, std::vector<int>* percents) {
+    const unsigned int n = mixer_ctl_get_num_values(ctl);
+    percents->resize(n);
+    for (unsigned int id = 0; id < n; id++) {
+        if (int valueOrError = mixer_ctl_get_percent(ctl, id); valueOrError >= 0) {
+            (*percents)[id] = valueOrError;
+        } else {
+            return valueOrError;
+        }
+    }
+    return 0;
+}
+
+int Mixer::getMixerControlValues(struct mixer_ctl* ctl, std::vector<int>* values) {
+    const unsigned int n = mixer_ctl_get_num_values(ctl);
+    values->resize(n);
+    for (unsigned int id = 0; id < n; id++) {
+        if (int valueOrError = mixer_ctl_get_value(ctl, id); valueOrError >= 0) {
+            (*values)[id] = valueOrError;
+        } else {
+            return valueOrError;
+        }
+    }
+    return 0;
+}
+
 int Mixer::setMixerControlPercent(struct mixer_ctl* ctl, int percent) {
-    int ret = 0;
     const unsigned int n = mixer_ctl_get_num_values(ctl);
     for (unsigned int id = 0; id < n; id++) {
         if (int error = mixer_ctl_set_percent(ctl, id, percent); error != 0) {
-            ret = error;
+            return error;
         }
     }
-    return ret;
+    return 0;
 }
 
 int Mixer::setMixerControlPercent(struct mixer_ctl* ctl, const std::vector<int>& percents) {
-    int ret = 0;
     const unsigned int n = mixer_ctl_get_num_values(ctl);
     for (unsigned int id = 0; id < n; id++) {
         if (int error = mixer_ctl_set_percent(ctl, id, id < percents.size() ? percents[id] : 0);
             error != 0) {
-            ret = error;
+            return error;
         }
     }
-    return ret;
+    return 0;
 }
 
 int Mixer::setMixerControlValue(struct mixer_ctl* ctl, int value) {
-    int ret = 0;
     const unsigned int n = mixer_ctl_get_num_values(ctl);
     for (unsigned int id = 0; id < n; id++) {
         if (int error = mixer_ctl_set_value(ctl, id, value); error != 0) {
-            ret = error;
+            return error;
         }
     }
-    return ret;
+    return 0;
 }
 
 }  // namespace aidl::android::hardware::audio::core::alsa
diff --git a/audio/aidl/default/alsa/Mixer.h b/audio/aidl/default/alsa/Mixer.h
index 8fba1e0..41f19a8 100644
--- a/audio/aidl/default/alsa/Mixer.h
+++ b/audio/aidl/default/alsa/Mixer.h
@@ -39,6 +39,11 @@
 
     bool isValid() const { return mMixer != nullptr; }
 
+    ndk::ScopedAStatus getMasterMute(bool* muted);
+    ndk::ScopedAStatus getMasterVolume(float* volume);
+    ndk::ScopedAStatus getMicGain(float* gain);
+    ndk::ScopedAStatus getMicMute(bool* muted);
+    ndk::ScopedAStatus getVolumes(std::vector<float>* volumes);
     ndk::ScopedAStatus setMasterMute(bool muted);
     ndk::ScopedAStatus setMasterVolume(float volume);
     ndk::ScopedAStatus setMicGain(float gain);
@@ -60,9 +65,16 @@
     static const std::map<Control, std::vector<ControlNamesAndExpectedCtlType>> kPossibleControls;
     static Controls initializeMixerControls(struct mixer* mixer);
 
+    ndk::ScopedAStatus findControl(Control ctl, struct mixer_ctl** result);
+    ndk::ScopedAStatus getMixerControlMute(Control ctl, bool* muted);
+    ndk::ScopedAStatus getMixerControlVolume(Control ctl, float* volume);
     ndk::ScopedAStatus setMixerControlMute(Control ctl, bool muted);
     ndk::ScopedAStatus setMixerControlVolume(Control ctl, float volume);
 
+    int getMixerControlPercent(struct mixer_ctl* ctl, std::vector<int>* percents)
+            REQUIRES(mMixerAccess);
+    int getMixerControlValues(struct mixer_ctl* ctl, std::vector<int>* values)
+            REQUIRES(mMixerAccess);
     int setMixerControlPercent(struct mixer_ctl* ctl, int percent) REQUIRES(mMixerAccess);
     int setMixerControlPercent(struct mixer_ctl* ctl, const std::vector<int>& percents)
             REQUIRES(mMixerAccess);
diff --git a/audio/aidl/default/primary/StreamPrimary.cpp b/audio/aidl/default/primary/StreamPrimary.cpp
index 1b1ea68..7e3bdd4 100644
--- a/audio/aidl/default/primary/StreamPrimary.cpp
+++ b/audio/aidl/default/primary/StreamPrimary.cpp
@@ -127,6 +127,11 @@
     if (isStubStream()) {
         return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
     }
+    float gain;
+    RETURN_STATUS_IF_ERROR(primary::PrimaryMixer::getInstance().getMicGain(&gain));
+    _aidl_return->resize(0);
+    _aidl_return->resize(mChannelCount, gain);
+    RETURN_STATUS_IF_ERROR(setHwGainImpl(*_aidl_return));
     return getHwGainImpl(_aidl_return);
 }
 
@@ -194,6 +199,9 @@
     if (isStubStream()) {
         return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
     }
+    RETURN_STATUS_IF_ERROR(primary::PrimaryMixer::getInstance().getVolumes(_aidl_return));
+    _aidl_return->resize(mChannelCount);
+    RETURN_STATUS_IF_ERROR(setHwVolumeImpl(*_aidl_return));
     return getHwVolumeImpl(_aidl_return);
 }