diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index de66293..3d7f30c 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -937,9 +937,12 @@
 }
 
 StreamInHwGainHelper::StreamInHwGainHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())), mHwGains(mChannelCount, 0.0f) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
 
 ndk::ScopedAStatus StreamInHwGainHelper::getHwGainImpl(std::vector<float>* _aidl_return) {
+    if (mHwGains.empty()) {
+        mHwGains.resize(mChannelCount, 0.0f);
+    }
     *_aidl_return = mHwGains;
     LOG(DEBUG) << __func__ << ": returning " << ::android::internal::ToString(*_aidl_return);
     return ndk::ScopedAStatus::ok();
@@ -1068,10 +1071,12 @@
 }
 
 StreamOutHwVolumeHelper::StreamOutHwVolumeHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())),
-      mHwVolumes(mChannelCount, 0.0f) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
 
 ndk::ScopedAStatus StreamOutHwVolumeHelper::getHwVolumeImpl(std::vector<float>* _aidl_return) {
+    if (mHwVolumes.empty()) {
+        mHwVolumes.resize(mChannelCount, 0.0f);
+    }
     *_aidl_return = mHwVolumes;
     LOG(DEBUG) << __func__ << ": returning " << ::android::internal::ToString(*_aidl_return);
     return ndk::ScopedAStatus::ok();
diff --git a/audio/aidl/default/primary/StreamPrimary.cpp b/audio/aidl/default/primary/StreamPrimary.cpp
index c1c1f03..0ad60eb 100644
--- a/audio/aidl/default/primary/StreamPrimary.cpp
+++ b/audio/aidl/default/primary/StreamPrimary.cpp
@@ -218,11 +218,12 @@
     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));
+    if (mHwGains.empty()) {
+        float gain;
+        RETURN_STATUS_IF_ERROR(primary::PrimaryMixer::getInstance().getMicGain(&gain));
+        _aidl_return->resize(mChannelCount, gain);
+        RETURN_STATUS_IF_ERROR(setHwGainImpl(*_aidl_return));
+    }
     return getHwGainImpl(_aidl_return);
 }
 
@@ -254,9 +255,11 @@
     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));
+    if (mHwVolumes.empty()) {
+        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);
 }