diff --git a/audio/aidl/default/virtualizer/VirtualizerSw.cpp b/audio/aidl/default/virtualizer/VirtualizerSw.cpp
index 0e8435e..091b0b7 100644
--- a/audio/aidl/default/virtualizer/VirtualizerSw.cpp
+++ b/audio/aidl/default/virtualizer/VirtualizerSw.cpp
@@ -203,10 +203,6 @@
     return mContext;
 }
 
-std::shared_ptr<EffectContext> VirtualizerSw::getContext() {
-    return mContext;
-}
-
 RetCode VirtualizerSw::releaseContext() {
     if (mContext) {
         mContext.reset();
diff --git a/audio/aidl/default/virtualizer/VirtualizerSw.h b/audio/aidl/default/virtualizer/VirtualizerSw.h
index 5e114d9..9287838 100644
--- a/audio/aidl/default/virtualizer/VirtualizerSw.h
+++ b/audio/aidl/default/virtualizer/VirtualizerSw.h
@@ -59,24 +59,25 @@
     }
 
     ndk::ScopedAStatus getDescriptor(Descriptor* _aidl_return) override;
-    ndk::ScopedAStatus setParameterSpecific(const Parameter::Specific& specific) override;
-    ndk::ScopedAStatus getParameterSpecific(const Parameter::Id& id,
-                                            Parameter::Specific* specific) override;
+    ndk::ScopedAStatus setParameterSpecific(const Parameter::Specific& specific)
+            REQUIRES(mImplMutex) override;
+    ndk::ScopedAStatus getParameterSpecific(const Parameter::Id& id, Parameter::Specific* specific)
+            REQUIRES(mImplMutex) override;
 
-    std::shared_ptr<EffectContext> createContext(const Parameter::Common& common) override;
-    std::shared_ptr<EffectContext> getContext() override;
-    RetCode releaseContext() override;
+    std::shared_ptr<EffectContext> createContext(const Parameter::Common& common)
+            REQUIRES(mImplMutex) override;
+    RetCode releaseContext() REQUIRES(mImplMutex) override;
 
     IEffect::Status effectProcessImpl(float* in, float* out, int samples) override;
     std::string getEffectName() override { return kEffectName; }
 
   private:
     static const std::vector<Range::VirtualizerRange> kRanges;
-    std::shared_ptr<VirtualizerSwContext> mContext;
+    std::shared_ptr<VirtualizerSwContext> mContext GUARDED_BY(mImplMutex);
 
     ndk::ScopedAStatus getParameterVirtualizer(const Virtualizer::Tag& tag,
-                                               Parameter::Specific* specific);
+                                               Parameter::Specific* specific) REQUIRES(mImplMutex);
     ndk::ScopedAStatus getSpeakerAngles(const Virtualizer::SpeakerAnglesPayload payload,
-                                        Parameter::Specific* specific);
+                                        Parameter::Specific* specific) REQUIRES(mImplMutex);
 };
 }  // namespace aidl::android::hardware::audio::effect