diff --git a/services/audioflinger/Effects.h b/services/audioflinger/Effects.h
index cbd62ea..6e34e9b 100644
--- a/services/audioflinger/Effects.h
+++ b/services/audioflinger/Effects.h
@@ -78,11 +78,11 @@
                         { return (mDescriptor.flags & EFFECT_FLAG_VOLUME_MASK)
                             == EFFECT_FLAG_VOLUME_MONITOR; }
 
-    status_t setEnabled(bool enabled, bool fromHandle) override;
-    status_t setEnabled_l(bool enabled) final;
+    status_t setEnabled(bool enabled, bool fromHandle) override EXCLUDES_EffectBase_Mutex;
+    status_t setEnabled_l(bool enabled) final REQUIRES(audio_utils::EffectBase_Mutex);
     bool isEnabled() const final;
-    void setSuspended(bool suspended) final;
-    bool suspended() const final;
+    void setSuspended(bool suspended) final EXCLUDES_EffectBase_Mutex;
+    bool suspended() const final EXCLUDES_EffectBase_Mutex;
 
     status_t command(int32_t __unused,
                              const std::vector<uint8_t>& __unused,
@@ -99,36 +99,40 @@
         return mCallback.load();
     }
 
-    status_t addHandle(IAfEffectHandle *handle) final;
-    ssize_t disconnectHandle(IAfEffectHandle *handle, bool unpinIfLast) final;
-    ssize_t removeHandle(IAfEffectHandle *handle) final;
-    ssize_t removeHandle_l(IAfEffectHandle *handle) final;
-    IAfEffectHandle* controlHandle_l() final;
-    bool purgeHandles() final;
+    status_t addHandle(IAfEffectHandle* handle) final EXCLUDES_EffectBase_Mutex;
+    ssize_t disconnectHandle(IAfEffectHandle* handle,
+                             bool unpinIfLast) final EXCLUDES_EffectBase_Mutex;
+    ssize_t removeHandle(IAfEffectHandle* handle) final EXCLUDES_EffectBase_Mutex;
+    ssize_t removeHandle_l(IAfEffectHandle* handle) final REQUIRES(audio_utils::EffectBase_Mutex);
+    IAfEffectHandle* controlHandle_l() final REQUIRES(audio_utils::EffectBase_Mutex);
+    bool purgeHandles() final EXCLUDES_EffectBase_Mutex;
 
-    void             checkSuspendOnEffectEnabled(bool enabled, bool threadLocked) final;
+    void checkSuspendOnEffectEnabled(bool enabled, bool threadLocked) final;
 
-    bool             isPinned() const final { return mPinned; }
-    void             unPin() final { mPinned = false; }
+    bool isPinned() const final { return mPinned; }
+    void unPin() final { mPinned = false; }
 
-    audio_utils::mutex& mutex() const final { return mMutex; }
+    audio_utils::mutex& mutex() const final
+            RETURN_CAPABILITY(android::audio_utils::EffectBase_Mutex) {
+        return mMutex;
+    }
 
-    status_t         updatePolicyState() final;
+    status_t updatePolicyState() final EXCLUDES_EffectBase_Mutex;
 
     sp<IAfEffectModule> asEffectModule() override { return nullptr; }
     sp<IAfDeviceEffectProxy> asDeviceEffectProxy() override { return nullptr; }
 
-    void             dump(int fd, const Vector<String16>& args) const override;
+    void dump(int fd, const Vector<String16>& args) const override;
 
 protected:
-    bool             isInternal_l() const {
-                         for (auto handle : mHandles) {
-                            if (handle->client() != nullptr) {
-                                return false;
-                            }
-                         }
-                         return true;
-                     }
+    bool isInternal_l() const REQUIRES(audio_utils::EffectBase_Mutex) {
+        for (auto handle : mHandles) {
+            if (handle->client() != nullptr) {
+                return false;
+            }
+        }
+        return true;
+    }
 
     bool             mPinned = false;
 
@@ -150,7 +154,10 @@
     // Audio policy effect state management
     // Mutex protecting transactions with audio policy manager as mutex() cannot
     // be held to avoid cross deadlocks with audio policy mutex
-    audio_utils::mutex& policyMutex() const { return mPolicyMutex; }
+    audio_utils::mutex& policyMutex() const
+            RETURN_CAPABILITY(android::audio_utils::EffectBase_PolicyMutex) {
+        return mPolicyMutex;
+    }
     mutable audio_utils::mutex mPolicyMutex{audio_utils::MutexOrder::kEffectBase_PolicyMutex};
     // Effect is registered in APM or not
     bool                      mPolicyRegistered = false;
@@ -175,25 +182,23 @@
                     int id,
                     audio_session_t sessionId,
                     bool pinned,
-                    audio_port_handle_t deviceId);
-    ~EffectModule() override;
+                    audio_port_handle_t deviceId) REQUIRES(audio_utils::EffectChain_Mutex);
+    ~EffectModule() override REQUIRES(audio_utils::EffectChain_Mutex);
 
-    void process() final;
-    bool updateState() final;
-    status_t command(int32_t cmdCode,
-                     const std::vector<uint8_t>& cmdData,
-                     int32_t maxReplySize,
-                     std::vector<uint8_t>* reply) final;
+    void process() final EXCLUDES_EffectBase_Mutex;
+    bool updateState_l() final REQUIRES(audio_utils::EffectChain_Mutex) EXCLUDES_EffectBase_Mutex;
+    status_t command(int32_t cmdCode, const std::vector<uint8_t>& cmdData, int32_t maxReplySize,
+                     std::vector<uint8_t>* reply) final EXCLUDES_EffectBase_Mutex;
 
-    void reset_l() final;
-    status_t configure() final;
-    status_t init() final;
+    void reset_l() final REQUIRES(audio_utils::EffectBase_Mutex);
+    status_t configure_l() final REQUIRES(audio_utils::EffectChain_Mutex);
+    status_t init_l() final REQUIRES(audio_utils::EffectChain_Mutex) EXCLUDES_EffectBase_Mutex;
     uint32_t status() const final {
         return mStatus;
     }
     bool isProcessEnabled() const final;
-    bool isOffloadedOrDirect() const final;
-    bool isVolumeControlEnabled() const final;
+    bool isOffloadedOrDirect_l() const final REQUIRES(audio_utils::EffectChain_Mutex);
+    bool isVolumeControlEnabled_l() const final REQUIRES(audio_utils::EffectChain_Mutex);
     void setInBuffer(const sp<EffectBufferHalInterface>& buffer) final;
     int16_t *inBuffer() const final {
         return mInBuffer != 0 ? reinterpret_cast<int16_t*>(mInBuffer->ptr()) : NULL;
@@ -203,36 +208,42 @@
         return mOutBuffer != 0 ? reinterpret_cast<int16_t*>(mOutBuffer->ptr()) : NULL;
     }
     // Updates the access mode if it is out of date.  May issue a new effect configure.
-    void updateAccessMode() final {
-                    if (requiredEffectBufferAccessMode() != mConfig.outputCfg.accessMode) {
-                        configure();
-                    }
-                }
-    status_t setDevices(const AudioDeviceTypeAddrVector &devices) final;
-    status_t setInputDevice(const AudioDeviceTypeAddr &device) final;
+    void updateAccessMode_l() final REQUIRES(audio_utils::EffectChain_Mutex) {
+        if (requiredEffectBufferAccessMode() != mConfig.outputCfg.accessMode) {
+            configure_l();
+        }
+    }
+    status_t setDevices(const AudioDeviceTypeAddrVector& devices) final EXCLUDES_EffectBase_Mutex;
+    status_t setInputDevice(const AudioDeviceTypeAddr& device) final EXCLUDES_EffectBase_Mutex;
     status_t setVolume(uint32_t *left, uint32_t *right, bool controller) final;
-    status_t setMode(audio_mode_t mode) final;
-    status_t setAudioSource(audio_source_t source) final;
-    status_t start() final;
-    status_t stop() final;
+    status_t setMode(audio_mode_t mode) final EXCLUDES_EffectBase_Mutex;
+    status_t setAudioSource(audio_source_t source) final EXCLUDES_EffectBase_Mutex;
+    status_t start_l() final REQUIRES(audio_utils::EffectChain_Mutex) EXCLUDES_EffectBase_Mutex;
+    status_t stop_l() final REQUIRES(audio_utils::EffectChain_Mutex) EXCLUDES_EffectBase_Mutex;
 
-    status_t setOffloaded(bool offloaded, audio_io_handle_t io) final;
-    bool isOffloaded() const final;
-    void addEffectToHal_l() final;
-    void release_l() final;
+    status_t setOffloaded_l(bool offloaded, audio_io_handle_t io) final
+            REQUIRES(audio_utils::EffectChain_Mutex) EXCLUDES_EffectBase_Mutex;
+    bool isOffloaded_l() const final
+            REQUIRES(audio_utils::EffectChain_Mutex) EXCLUDES_EffectBase_Mutex;
+    void addEffectToHal_l() final REQUIRES(audio_utils::EffectChain_Mutex);
+    void release_l() final REQUIRES(audio_utils::EffectChain_Mutex);
 
     sp<IAfEffectModule> asEffectModule() final { return this; }
 
     bool isHapticGenerator() const final;
     bool isSpatializer() const final;
 
-    status_t setHapticIntensity(int id, os::HapticScale intensity) final;
-    status_t setVibratorInfo(const media::AudioVibratorInfo& vibratorInfo) final;
-    status_t sendMetadata(const std::vector<playback_track_metadata_v7_t>& metadata) final;
+    status_t setHapticIntensity_l(int id, os::HapticScale intensity) final
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectBase_Mutex;
+    status_t setVibratorInfo_l(const media::AudioVibratorInfo& vibratorInfo) final
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectBase_Mutex;
+    status_t sendMetadata_ll(const std::vector<playback_track_metadata_v7_t>& metadata) final
+            REQUIRES(audio_utils::ThreadBase_Mutex,
+                     audio_utils::EffectChain_Mutex) EXCLUDES_EffectBase_Mutex;
 
-    status_t getConfigs(audio_config_base_t* inputCfg,
-                                audio_config_base_t* outputCfg,
-                                bool* isOutput) const final;
+    status_t getConfigs_l(audio_config_base_t* inputCfg, audio_config_base_t* outputCfg,
+                          bool* isOutput) const final
+            REQUIRES(audio_utils::EffectHandle_Mutex) EXCLUDES_EffectBase_Mutex;
 
     void dump(int fd, const Vector<String16>& args) const final;
 
@@ -243,9 +254,9 @@
 
     DISALLOW_COPY_AND_ASSIGN(EffectModule);
 
-    status_t start_l();
-    status_t stop_l();
-    status_t removeEffectFromHal_l();
+    status_t start_ll() REQUIRES(audio_utils::EffectChain_Mutex, audio_utils::EffectBase_Mutex);
+    status_t stop_ll() REQUIRES(audio_utils::EffectChain_Mutex, audio_utils::EffectBase_Mutex);
+    status_t removeEffectFromHal_l() REQUIRES(audio_utils::EffectChain_Mutex);
     status_t sendSetAudioDevicesCommand(const AudioDeviceTypeAddrVector &devices, uint32_t cmdCode);
     effect_buffer_access_e requiredEffectBufferAccessMode() const {
         return mConfig.inputCfg.buffer.raw == mConfig.outputCfg.buffer.raw
@@ -368,7 +379,9 @@
 private:
     DISALLOW_COPY_AND_ASSIGN(EffectHandle);
 
-    audio_utils::mutex& mutex() const { return mMutex; }
+    audio_utils::mutex& mutex() const RETURN_CAPABILITY(android::audio_utils::EffectHandle_Mutex) {
+        return mMutex;
+    }
     // protects IEffect method calls
     mutable audio_utils::mutex mMutex{audio_utils::MutexOrder::kEffectHandle_Mutex};
     const wp<IAfEffectBase> mEffect;               // pointer to controlled EffectModule
@@ -407,31 +420,37 @@
         return mMutex;
     }
 
-    status_t createEffect_l(sp<IAfEffectModule>& effect,
-                            effect_descriptor_t *desc,
-                            int id,
-                            audio_session_t sessionId,
-                            bool pinned) final;
-    status_t addEffect_l(const sp<IAfEffectModule>& handle) final;
-    status_t addEffect_ll(const sp<IAfEffectModule>& handle) final;
-    size_t removeEffect_l(const sp<IAfEffectModule>& handle, bool release = false) final;
+    status_t createEffect_l(sp<IAfEffectModule>& effect, effect_descriptor_t* desc, int id,
+                            audio_session_t sessionId, bool pinned) final
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectChain_Mutex;
+    status_t addEffect_l(const sp<IAfEffectModule>& handle) final
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectChain_Mutex;
+    status_t addEffect_ll(const sp<IAfEffectModule>& handle) final
+            REQUIRES(audio_utils::ThreadBase_Mutex, audio_utils::EffectChain_Mutex);
+    size_t removeEffect_l(const sp<IAfEffectModule>& handle, bool release = false) final
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectChain_Mutex;
 
     audio_session_t sessionId() const final { return mSessionId; }
     void setSessionId(audio_session_t sessionId) final { mSessionId = sessionId; }
 
-    sp<IAfEffectModule> getEffectFromDesc_l(effect_descriptor_t *descriptor) const final;
-    sp<IAfEffectModule> getEffectFromId_l(int id) const final;
-    sp<IAfEffectModule> getEffectFromType_l(const effect_uuid_t *type) const final;
-    std::vector<int> getEffectIds() const final;
+    sp<IAfEffectModule> getEffectFromDesc_l(effect_descriptor_t* descriptor) const final
+            REQUIRES(audio_utils::ThreadBase_Mutex);
+    sp<IAfEffectModule> getEffectFromId_l(int id) const final
+            REQUIRES(audio_utils::ThreadBase_Mutex);
+    sp<IAfEffectModule> getEffectFromType_l(const effect_uuid_t* type) const final
+            REQUIRES(audio_utils::ThreadBase_Mutex);
+    std::vector<int> getEffectIds_l() const final REQUIRES(audio_utils::ThreadBase_Mutex);
     // FIXME use float to improve the dynamic range
 
     bool setVolume(uint32_t* left, uint32_t* right,
                    bool force = false) final EXCLUDES_EffectChain_Mutex;
     void resetVolume_l() final REQUIRES(audio_utils::EffectChain_Mutex);
-    void setDevices_l(const AudioDeviceTypeAddrVector &devices) final;
-    void setInputDevice_l(const AudioDeviceTypeAddr &device) final;
-    void setMode_l(audio_mode_t mode) final;
-    void setAudioSource_l(audio_source_t source) final;
+    void setDevices_l(const AudioDeviceTypeAddrVector& devices) final
+            REQUIRES(audio_utils::ThreadBase_Mutex);
+    void setInputDevice_l(const AudioDeviceTypeAddr& device) final
+            REQUIRES(audio_utils::ThreadBase_Mutex);
+    void setMode_l(audio_mode_t mode) final REQUIRES(audio_utils::ThreadBase_Mutex);
+    void setAudioSource_l(audio_source_t source) final REQUIRES(audio_utils::ThreadBase_Mutex);
 
     void setInBuffer(const sp<EffectBufferHalInterface>& buffer) final {
         mInBuffer = buffer;
@@ -462,21 +481,22 @@
 
     // suspend or restore effects of the specified type. The number of suspend requests is counted
     // and restore occurs once all suspend requests are cancelled.
-    void setEffectSuspended_l(const effect_uuid_t *type,
-                              bool suspend) final;
+    void setEffectSuspended_l(const effect_uuid_t* type, bool suspend) final
+            REQUIRES(audio_utils::ThreadBase_Mutex);
     // suspend all eligible effects
-    void setEffectSuspendedAll_l(bool suspend) final;
+    void setEffectSuspendedAll_l(bool suspend) final REQUIRES(audio_utils::ThreadBase_Mutex);
     // check if effects should be suspended or restored when a given effect is enable or disabled
-    void checkSuspendOnEffectEnabled(
-            const sp<IAfEffectModule>& effect, bool enabled) final;
+    void checkSuspendOnEffectEnabled_l(const sp<IAfEffectModule>& effect, bool enabled) final
+            REQUIRES(audio_utils::ThreadBase_Mutex);
 
-    void clearInputBuffer() final;
+    void clearInputBuffer() final EXCLUDES_EffectChain_Mutex;
 
     // At least one non offloadable effect in the chain is enabled
-    bool isNonOffloadableEnabled() const final;
-    bool isNonOffloadableEnabled_l() const final;
+    bool isNonOffloadableEnabled() const final EXCLUDES_EffectChain_Mutex;
+    bool isNonOffloadableEnabled_l() const final REQUIRES(audio_utils::EffectChain_Mutex);
 
-    void syncHalEffectsState() final;
+    void syncHalEffectsState_l()
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectChain_Mutex final;
 
     // flags is an ORed set of audio_output_flags_t which is updated on return.
     void checkOutputFlagCompatibility(audio_output_flags_t *flags) const final;
@@ -495,12 +515,13 @@
 
     // isCompatibleWithThread_l() must be called with thread->mutex() held
     bool isCompatibleWithThread_l(const sp<IAfThreadBase>& thread) const final
-            REQUIRES(audio_utils::ThreadBase_Mutex);
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectChain_Mutex;
 
     // Requires either IAfThreadBase::mutex() or EffectChain::mutex() held
     bool containsHapticGeneratingEffect_l() final;
 
-    void setHapticIntensity_l(int id, os::HapticScale intensity) final;
+    void setHapticIntensity_l(int id, os::HapticScale intensity) final
+            REQUIRES(audio_utils::ThreadBase_Mutex) EXCLUDES_EffectChain_Mutex;
 
     sp<EffectCallbackInterface> effectCallback() const final { return mEffectCallback; }
 
@@ -522,7 +543,7 @@
         const std::optional<const std::vector<playback_track_metadata_v7_t>> spatializedMetadata)
             final REQUIRES(audio_utils::ThreadBase_Mutex);
 
-    void setThread(const sp<IAfThreadBase>& thread) final;
+    void setThread(const sp<IAfThreadBase>& thread) final EXCLUDES_EffectChain_Mutex;
 
   private:
     bool setVolume_l(uint32_t* left, uint32_t* right, bool force = false)
@@ -573,9 +594,10 @@
         void setVolumeForOutput(float left, float right) const override;
 
         // check if effects should be suspended/restored when a given effect is enable/disabled
-        void checkSuspendOnEffectEnabled(const sp<IAfEffectBase>& effect,
-                              bool enabled, bool threadLocked) override;
-        void resetVolume() override;
+        void checkSuspendOnEffectEnabled(const sp<IAfEffectBase>& effect, bool enabled,
+                                         bool threadLocked) override;
+        void resetVolume_l() override
+                REQUIRES(audio_utils::ThreadBase_Mutex, audio_utils::EffectChain_Mutex);
         product_strategy_t strategy() const override;
         int32_t activeTrackCnt() const override;
         void onEffectEnable(const sp<IAfEffectBase>& effect) override;
@@ -615,27 +637,34 @@
 
     // get a list of effect modules to suspend when an effect of the type
     // passed is enabled.
-    void  getSuspendEligibleEffects(Vector<sp<IAfEffectModule>> &effects);
+    void getSuspendEligibleEffects_l(Vector<sp<IAfEffectModule>>& effects)
+            REQUIRES(audio_utils::ThreadBase_Mutex);
 
     // get an effect module if it is currently enable
-    sp<IAfEffectModule> getEffectIfEnabled(const effect_uuid_t *type);
+    sp<IAfEffectModule> getEffectIfEnabled_l(const effect_uuid_t* type)
+            REQUIRES(audio_utils::ThreadBase_Mutex);
     // true if the effect whose descriptor is passed can be suspended
     // OEMs can modify the rules implemented in this method to exclude specific effect
     // types or implementations from the suspend/restore mechanism.
-    bool isEffectEligibleForSuspend(const effect_descriptor_t& desc);
+    bool isEffectEligibleForSuspend_l(const effect_descriptor_t& desc)
+            REQUIRES(audio_utils::ThreadBase_Mutex);
 
-    static bool isEffectEligibleForBtNrecSuspend(const effect_uuid_t *type);
+    static bool isEffectEligibleForBtNrecSuspend_l(const effect_uuid_t* type)
+            REQUIRES(audio_utils::ThreadBase_Mutex);
 
-    void clearInputBuffer_l();
+    void clearInputBuffer_l() REQUIRES(audio_utils::EffectChain_Mutex);
 
     // true if any effect module within the chain has volume control
-    bool hasVolumeControlEnabled_l() const;
+    bool hasVolumeControlEnabled_l() const REQUIRES(audio_utils::EffectChain_Mutex);
 
-    void setVolumeForOutput_l(uint32_t left, uint32_t right);
+    void setVolumeForOutput_l(uint32_t left, uint32_t right)
+            REQUIRES(audio_utils::EffectChain_Mutex);
 
-    ssize_t getInsertIndex(const effect_descriptor_t& desc);
+    ssize_t getInsertIndex_ll(const effect_descriptor_t& desc)
+            REQUIRES(audio_utils::ThreadBase_Mutex, audio_utils::EffectChain_Mutex);
 
-    std::optional<size_t> findVolumeControl_l(size_t from, size_t to) const;
+    std::optional<size_t> findVolumeControl_l(size_t from, size_t to) const
+            REQUIRES(audio_utils::EffectChain_Mutex);
 
     // mutex protecting effect list
     mutable audio_utils::mutex mMutex{audio_utils::MutexOrder::kEffectChain_Mutex};
@@ -679,11 +708,11 @@
     status_t setEnabled(bool enabled, bool fromHandle) final;
     sp<IAfDeviceEffectProxy> asDeviceEffectProxy() final { return this; }
 
-    status_t init(const std::map<audio_patch_handle_t,
-            IAfPatchPanel::Patch>& patches) final;
+    status_t init_l(const std::map<audio_patch_handle_t, IAfPatchPanel::Patch>& patches) final
+            REQUIRES(audio_utils::DeviceEffectManager_Mutex) EXCLUDES_EffectBase_Mutex;
 
     status_t onCreatePatch(audio_patch_handle_t patchHandle,
-            const IAfPatchPanel::Patch& patch) final;
+                           const IAfPatchPanel::Patch& patch) final;
 
     status_t onUpdatePatch(audio_patch_handle_t oldPatchHandle, audio_patch_handle_t newPatchHandle,
            const IAfPatchPanel::Patch& patch) final;
@@ -701,10 +730,8 @@
     audio_channel_mask_t channelMask() const final;
     uint32_t channelCount() const final;
 
-    status_t command(int32_t cmdCode,
-                     const std::vector<uint8_t>& cmdData,
-                     int32_t maxReplySize,
-                     std::vector<uint8_t>* reply) final;
+    status_t command(int32_t cmdCode, const std::vector<uint8_t>& cmdData, int32_t maxReplySize,
+                     std::vector<uint8_t>* reply) final EXCLUDES_DeviceEffectProxy_ProxyMutex;
 
     void dump2(int fd, int spaces) const final;
 
@@ -750,7 +777,7 @@
 
         void checkSuspendOnEffectEnabled(const sp<IAfEffectBase>& effect __unused,
                               bool enabled __unused, bool threadLocked __unused) override {}
-        void resetVolume() override {}
+        void resetVolume_l() override REQUIRES(audio_utils::EffectChain_Mutex) {}
         product_strategy_t strategy() const override  { return static_cast<product_strategy_t>(0); }
         int32_t activeTrackCnt() const override { return 0; }
         void onEffectEnable(const sp<IAfEffectBase>& effect __unused) override;
@@ -770,13 +797,16 @@
     };
 
     status_t checkPort(const IAfPatchPanel::Patch& patch,
-            const struct audio_port_config *port, sp<IAfEffectHandle> *handle);
+            const struct audio_port_config* port, sp<IAfEffectHandle>* handle);
 
     const AudioDeviceTypeAddr mDevice;
     const sp<DeviceEffectManagerCallback> mManagerCallback;
     const sp<ProxyCallback> mMyCallback;
 
-    audio_utils::mutex& proxyMutex() const { return mProxyMutex; }
+    audio_utils::mutex& proxyMutex() const
+            RETURN_CAPABILITY(android::audio_utils::DeviceEffectProxy_ProxyMutex) {
+        return mProxyMutex;
+    }
     mutable audio_utils::mutex mProxyMutex{
             audio_utils::MutexOrder::kDeviceEffectProxy_ProxyMutex};
     std::map<audio_patch_handle_t, sp<IAfEffectHandle>> mEffectHandles; // protected by mProxyMutex