diff --git a/audio/aidl/default/equalizer/EqualizerSw.cpp b/audio/aidl/default/equalizer/EqualizerSw.cpp
index b2add31..640b3ba 100644
--- a/audio/aidl/default/equalizer/EqualizerSw.cpp
+++ b/audio/aidl/default/equalizer/EqualizerSw.cpp
@@ -198,10 +198,6 @@
     return mContext;
 }
 
-std::shared_ptr<EffectContext> EqualizerSw::getContext() {
-    return mContext;
-}
-
 RetCode EqualizerSw::releaseContext() {
     if (mContext) {
         mContext.reset();
diff --git a/audio/aidl/default/equalizer/EqualizerSw.h b/audio/aidl/default/equalizer/EqualizerSw.h
index 56af3b5..caaa129 100644
--- a/audio/aidl/default/equalizer/EqualizerSw.h
+++ b/audio/aidl/default/equalizer/EqualizerSw.h
@@ -97,15 +97,17 @@
     }
 
     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;
+    IEffect::Status effectProcessImpl(float* in, float* out, int samples)
+            REQUIRES(mImplMutex) override;
     std::string getEffectName() override { return kEffectName; }
 
   private:
@@ -113,7 +115,7 @@
     static const std::vector<Equalizer::Preset> kPresets;
     static const std::vector<Range::EqualizerRange> kRanges;
     ndk::ScopedAStatus getParameterEqualizer(const Equalizer::Tag& tag,
-                                             Parameter::Specific* specific);
+                                             Parameter::Specific* specific) REQUIRES(mImplMutex);
     std::shared_ptr<EqualizerSwContext> mContext;
 };