diff --git a/audio/aidl/android/hardware/audio/core/stream-out-async-sm.gv b/audio/aidl/android/hardware/audio/core/stream-out-async-sm.gv
index 56b7926..e2da90d 100644
--- a/audio/aidl/android/hardware/audio/core/stream-out-async-sm.gv
+++ b/audio/aidl/android/hardware/audio/core/stream-out-async-sm.gv
@@ -45,6 +45,8 @@
     PAUSED -> ACTIVE [label="start"];                 // consumer -> active
     PAUSED -> IDLE [label="flush"];                   // producer -> passive, buffer is cleared
     DRAINING -> IDLE [label="←IStreamCallback.onDrainReady"];
+    DRAINING -> DRAINING [label="←IStreamCallback.onDrainReady"];  // allowed for `DRAIN_EARLY_NOTIFY`
+    DRAINING -> IDLE [label="<empty buffer>"];        // allowed for `DRAIN_EARLY_NOTIFY`
     DRAINING -> TRANSFERRING [label="burst"];         // producer -> active
     DRAINING -> ACTIVE [label="burst"];               // full write
     DRAINING -> DRAIN_PAUSED [label="pause"];         // consumer -> passive (not consuming)
diff --git a/audio/aidl/default/Module.cpp b/audio/aidl/default/Module.cpp
index 51b6085..e96cf81 100644
--- a/audio/aidl/default/Module.cpp
+++ b/audio/aidl/default/Module.cpp
@@ -207,9 +207,9 @@
         return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
     }
     const auto& flags = portConfigIt->flags.value();
-    StreamContext::DebugParameters params{mDebug.streamTransientStateDelayMs,
-                                          mVendorDebug.forceTransientBurst,
-                                          mVendorDebug.forceSynchronousDrain};
+    StreamContext::DebugParameters params{
+            mDebug.streamTransientStateDelayMs, mVendorDebug.forceTransientBurst,
+            mVendorDebug.forceSynchronousDrain, mVendorDebug.forceDrainToDraining};
     std::unique_ptr<StreamContext::DataMQ> dataMQ = nullptr;
     std::shared_ptr<IStreamCallback> streamAsyncCallback = nullptr;
     std::shared_ptr<ISoundDose> soundDose;
@@ -1524,6 +1524,7 @@
 
 const std::string Module::VendorDebug::kForceTransientBurstName = "aosp.forceTransientBurst";
 const std::string Module::VendorDebug::kForceSynchronousDrainName = "aosp.forceSynchronousDrain";
+const std::string Module::VendorDebug::kForceDrainToDrainingName = "aosp.forceDrainToDraining";
 
 ndk::ScopedAStatus Module::getVendorParameters(const std::vector<std::string>& in_ids,
                                                std::vector<VendorParameter>* _aidl_return) {
@@ -1538,6 +1539,10 @@
             VendorParameter forceSynchronousDrain{.id = id};
             forceSynchronousDrain.ext.setParcelable(Boolean{mVendorDebug.forceSynchronousDrain});
             _aidl_return->push_back(std::move(forceSynchronousDrain));
+        } else if (id == VendorDebug::kForceDrainToDrainingName) {
+            VendorParameter forceDrainToDraining{.id = id};
+            forceDrainToDraining.ext.setParcelable(Boolean{mVendorDebug.forceDrainToDraining});
+            _aidl_return->push_back(std::move(forceDrainToDraining));
         } else {
             allParametersKnown = false;
             LOG(VERBOSE) << __func__ << ": " << mType << ": unrecognized parameter \"" << id << "\"";
@@ -1578,6 +1583,10 @@
             if (!extractParameter<Boolean>(p, &mVendorDebug.forceSynchronousDrain)) {
                 return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
             }
+        } else if (p.id == VendorDebug::kForceDrainToDrainingName) {
+            if (!extractParameter<Boolean>(p, &mVendorDebug.forceDrainToDraining)) {
+                return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+            }
         } else {
             allParametersKnown = false;
             LOG(VERBOSE) << __func__ << ": " << mType << ": unrecognized parameter \"" << p.id
diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index 3d7f30c..4525f6a 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -382,8 +382,20 @@
 const std::string StreamOutWorkerLogic::kThreadName = "writer";
 
 StreamOutWorkerLogic::Status StreamOutWorkerLogic::cycle() {
-    if (mState == StreamDescriptor::State::DRAINING ||
-        mState == StreamDescriptor::State::TRANSFERRING) {
+    if (mState == StreamDescriptor::State::DRAINING && mContext->getForceDrainToDraining() &&
+        mOnDrainReadyStatus == OnDrainReadyStatus::UNSENT) {
+        std::shared_ptr<IStreamCallback> asyncCallback = mContext->getAsyncCallback();
+        if (asyncCallback != nullptr) {
+            ndk::ScopedAStatus status = asyncCallback->onDrainReady();
+            if (!status.isOk()) {
+                LOG(ERROR) << __func__ << ": error from onDrainReady: " << status;
+            }
+            // This sets the timeout for moving into IDLE on next iterations.
+            switchToTransientState(StreamDescriptor::State::DRAINING);
+            mOnDrainReadyStatus = OnDrainReadyStatus::SENT;
+        }
+    } else if (mState == StreamDescriptor::State::DRAINING ||
+               mState == StreamDescriptor::State::TRANSFERRING) {
         if (auto stateDurationMs = std::chrono::duration_cast<std::chrono::milliseconds>(
                     std::chrono::steady_clock::now() - mTransientStateStart);
             stateDurationMs >= mTransientStateDelayMs) {
@@ -396,9 +408,12 @@
                 // drain or transfer completion. In the stub, we switch unconditionally.
                 if (mState == StreamDescriptor::State::DRAINING) {
                     mState = StreamDescriptor::State::IDLE;
-                    ndk::ScopedAStatus status = asyncCallback->onDrainReady();
-                    if (!status.isOk()) {
-                        LOG(ERROR) << __func__ << ": error from onDrainReady: " << status;
+                    if (mOnDrainReadyStatus != OnDrainReadyStatus::SENT) {
+                        ndk::ScopedAStatus status = asyncCallback->onDrainReady();
+                        if (!status.isOk()) {
+                            LOG(ERROR) << __func__ << ": error from onDrainReady: " << status;
+                        }
+                        mOnDrainReadyStatus = OnDrainReadyStatus::SENT;
                     }
                 } else {
                     mState = StreamDescriptor::State::ACTIVE;
@@ -537,6 +552,10 @@
                             mState = StreamDescriptor::State::IDLE;
                         } else {
                             switchToTransientState(StreamDescriptor::State::DRAINING);
+                            mOnDrainReadyStatus =
+                                    mode == StreamDescriptor::DrainMode::DRAIN_EARLY_NOTIFY
+                                            ? OnDrainReadyStatus::UNSENT
+                                            : OnDrainReadyStatus::IGNORE;
                         }
                     } else {
                         LOG(ERROR) << __func__ << ": drain failed: " << status;
diff --git a/audio/aidl/default/include/core-impl/Module.h b/audio/aidl/default/include/core-impl/Module.h
index 7e32cf2..d03598a 100644
--- a/audio/aidl/default/include/core-impl/Module.h
+++ b/audio/aidl/default/include/core-impl/Module.h
@@ -148,8 +148,10 @@
     struct VendorDebug {
         static const std::string kForceTransientBurstName;
         static const std::string kForceSynchronousDrainName;
+        static const std::string kForceDrainToDrainingName;
         bool forceTransientBurst = false;
         bool forceSynchronousDrain = false;
+        bool forceDrainToDraining = false;
     };
     // ids of device ports created at runtime via 'connectExternalDevice'.
     // Also stores a list of ids of mix ports with dynamic profiles that were populated from
diff --git a/audio/aidl/default/include/core-impl/Stream.h b/audio/aidl/default/include/core-impl/Stream.h
index f7b9269..8297fc5 100644
--- a/audio/aidl/default/include/core-impl/Stream.h
+++ b/audio/aidl/default/include/core-impl/Stream.h
@@ -78,6 +78,10 @@
         bool forceTransientBurst = false;
         // Force the "drain" command to be synchronous, going directly to the IDLE state.
         bool forceSynchronousDrain = false;
+        // Force the "drain early notify" command to keep the SM in the DRAINING state
+        // after sending 'onDrainReady' callback. The SM moves to IDLE after
+        // 'transientStateDelayMs'.
+        bool forceDrainToDraining = false;
     };
 
     StreamContext() = default;
@@ -119,6 +123,7 @@
     ::aidl::android::media::audio::common::AudioIoFlags getFlags() const { return mFlags; }
     bool getForceTransientBurst() const { return mDebugParameters.forceTransientBurst; }
     bool getForceSynchronousDrain() const { return mDebugParameters.forceSynchronousDrain; }
+    bool getForceDrainToDraining() const { return mDebugParameters.forceDrainToDraining; }
     size_t getFrameSize() const;
     int getInternalCommandCookie() const { return mInternalCommandCookie; }
     int32_t getMixPortHandle() const { return mMixPortHandle; }
@@ -301,6 +306,9 @@
     bool write(size_t clientSize, StreamDescriptor::Reply* reply);
 
     std::shared_ptr<IStreamOutEventCallback> mEventCallback;
+
+    enum OnDrainReadyStatus : int32_t { IGNORE /*used for DRAIN_ALL*/, UNSENT, SENT };
+    OnDrainReadyStatus mOnDrainReadyStatus = OnDrainReadyStatus::IGNORE;
 };
 using StreamOutWorker = StreamWorkerImpl<StreamOutWorkerLogic>;
 
diff --git a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
index 6bfba65..6bce107 100644
--- a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
+++ b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
@@ -117,6 +117,10 @@
 using ndk::enum_range;
 using ndk::ScopedAStatus;
 
+static constexpr int32_t kAidlVersion1 = 1;
+static constexpr int32_t kAidlVersion2 = 2;
+static constexpr int32_t kAidlVersion3 = 3;
+
 template <typename T>
 std::set<int32_t> extractIds(const std::vector<T>& v) {
     std::set<int32_t> ids;
@@ -452,7 +456,6 @@
     // This is implemented by the 'StreamFixture' utility class.
     static constexpr int kNegativeTestBufferSizeFrames = 256;
     static constexpr int kDefaultLargeBufferSizeFrames = 48000;
-    static constexpr int32_t kAidlVersion3 = 3;
 
     void SetUpImpl(const std::string& moduleName, bool setUpDebug = true) {
         ASSERT_NO_FATAL_FAILURE(ConnectToService(moduleName, setUpDebug));
@@ -582,7 +585,7 @@
     std::unique_ptr<WithDebugFlags> debug;
     std::vector<AudioPort> initialPorts;
     std::vector<AudioRoute> initialRoutes;
-    int32_t aidlVersion;
+    int32_t aidlVersion = -1;
 };
 
 class WithDevicePortConnectedState {
@@ -1837,6 +1840,7 @@
 }
 
 TEST_P(AudioCoreModule, SetAudioPortConfigInvalidPortAudioGain) {
+    ASSERT_GE(aidlVersion, kAidlVersion1);
     if (aidlVersion < kAidlVersion3) {
         GTEST_SKIP() << "Skip for audio HAL version lower than " << kAidlVersion3;
     }
@@ -4021,6 +4025,7 @@
 
 enum {
     NAMED_CMD_NAME,
+    NAMED_CMD_MIN_INTERFACE_VERSION,
     NAMED_CMD_DELAY_MS,
     NAMED_CMD_STREAM_TYPE,
     NAMED_CMD_CMDS,
@@ -4028,7 +4033,7 @@
 };
 enum class StreamTypeFilter { ANY, SYNC, ASYNC };
 using NamedCommandSequence =
-        std::tuple<std::string, int /*cmdDelayMs*/, StreamTypeFilter,
+        std::tuple<std::string, int /*minInterfaceVersion*/, int /*cmdDelayMs*/, StreamTypeFilter,
                    std::shared_ptr<StateSequence>, bool /*validatePositionIncrease*/>;
 enum { PARAM_MODULE_NAME, PARAM_CMD_SEQ, PARAM_SETUP_SEQ };
 using StreamIoTestParameters =
@@ -4039,6 +4044,12 @@
   public:
     void SetUp() override {
         ASSERT_NO_FATAL_FAILURE(SetUpImpl(std::get<PARAM_MODULE_NAME>(GetParam())));
+        ASSERT_GE(aidlVersion, kAidlVersion1);
+        if (const int minVersion =
+                    std::get<NAMED_CMD_MIN_INTERFACE_VERSION>(std::get<PARAM_CMD_SEQ>(GetParam()));
+            aidlVersion < minVersion) {
+            GTEST_SKIP() << "Skip for audio HAL version lower than " << minVersion;
+        }
         ASSERT_NO_FATAL_FAILURE(SetUpModuleConfig());
     }
 
@@ -4048,6 +4059,20 @@
         if (allPortConfigs.empty()) {
             GTEST_SKIP() << "No mix ports have attached devices";
         }
+        const auto& commandsAndStates =
+                std::get<NAMED_CMD_CMDS>(std::get<PARAM_CMD_SEQ>(GetParam()));
+        const bool validatePositionIncrease =
+                std::get<NAMED_CMD_VALIDATE_POS_INCREASE>(std::get<PARAM_CMD_SEQ>(GetParam()));
+        auto runStreamIoCommands = [&](const AudioPortConfig& portConfig) {
+            if (!std::get<PARAM_SETUP_SEQ>(GetParam())) {
+                ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq1(portConfig, commandsAndStates,
+                                                                    validatePositionIncrease));
+            } else {
+                ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq2(portConfig, commandsAndStates,
+                                                                    validatePositionIncrease));
+            }
+        };
+
         for (const auto& portConfig : allPortConfigs) {
             auto port = moduleConfig->getPort(portConfig.portId);
             ASSERT_TRUE(port.has_value());
@@ -4075,16 +4100,18 @@
             delayTransientStates.flags().streamTransientStateDelayMs =
                     std::get<NAMED_CMD_DELAY_MS>(std::get<PARAM_CMD_SEQ>(GetParam()));
             ASSERT_NO_FATAL_FAILURE(delayTransientStates.SetUp(module.get()));
-            const auto& commandsAndStates =
-                    std::get<NAMED_CMD_CMDS>(std::get<PARAM_CMD_SEQ>(GetParam()));
-            const bool validatePositionIncrease =
-                    std::get<NAMED_CMD_VALIDATE_POS_INCREASE>(std::get<PARAM_CMD_SEQ>(GetParam()));
-            if (!std::get<PARAM_SETUP_SEQ>(GetParam())) {
-                ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq1(portConfig, commandsAndStates,
-                                                                    validatePositionIncrease));
-            } else {
-                ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq2(portConfig, commandsAndStates,
-                                                                    validatePositionIncrease));
+            ASSERT_NO_FATAL_FAILURE(runStreamIoCommands(portConfig));
+            if (aidlVersion >= kAidlVersion3 && isNonBlocking && !IOTraits<Stream>::is_input) {
+                // Also try running the same sequence with "aosp.forceDrainToDraining" set.
+                // This will only work with the default implementation. When it works, the stream
+                // tries always to move to the 'DRAINING' state after an "early notify" drain.
+                // This helps to check more paths for our test scenarios.
+                WithModuleParameter forceDrainToDraining("aosp.forceDrainToDraining",
+                                                         Boolean{true});
+                if (forceDrainToDraining.SetUpNoChecks(module.get(), true /*failureExpected*/)
+                            .isOk()) {
+                    ASSERT_NO_FATAL_FAILURE(runStreamIoCommands(portConfig));
+                }
             }
             if (isNonBlocking) {
                 // Also try running the same sequence with "aosp.forceTransientBurst" set.
@@ -4094,13 +4121,7 @@
                 WithModuleParameter forceTransientBurst("aosp.forceTransientBurst", Boolean{true});
                 if (forceTransientBurst.SetUpNoChecks(module.get(), true /*failureExpected*/)
                             .isOk()) {
-                    if (!std::get<PARAM_SETUP_SEQ>(GetParam())) {
-                        ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq1(
-                                portConfig, commandsAndStates, validatePositionIncrease));
-                    } else {
-                        ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq2(
-                                portConfig, commandsAndStates, validatePositionIncrease));
-                    }
+                    ASSERT_NO_FATAL_FAILURE(runStreamIoCommands(portConfig));
                 }
             } else if (!IOTraits<Stream>::is_input) {
                 // Also try running the same sequence with "aosp.forceSynchronousDrain" set.
@@ -4111,13 +4132,7 @@
                                                           Boolean{true});
                 if (forceSynchronousDrain.SetUpNoChecks(module.get(), true /*failureExpected*/)
                             .isOk()) {
-                    if (!std::get<PARAM_SETUP_SEQ>(GetParam())) {
-                        ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq1(
-                                portConfig, commandsAndStates, validatePositionIncrease));
-                    } else {
-                        ASSERT_NO_FATAL_FAILURE(RunStreamIoCommandsImplSeq2(
-                                portConfig, commandsAndStates, validatePositionIncrease));
-                    }
+                    ASSERT_NO_FATAL_FAILURE(runStreamIoCommands(portConfig));
                 }
             }
         }
@@ -4570,14 +4585,14 @@
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
 static const NamedCommandSequence kReadSeq =
-        std::make_tuple(std::string("Read"), 0, StreamTypeFilter::ANY, makeBurstCommands(true),
-                        true /*validatePositionIncrease*/);
+        std::make_tuple(std::string("Read"), kAidlVersion1, 0, StreamTypeFilter::ANY,
+                        makeBurstCommands(true), true /*validatePositionIncrease*/);
 static const NamedCommandSequence kWriteSyncSeq =
-        std::make_tuple(std::string("Write"), 0, StreamTypeFilter::SYNC, makeBurstCommands(true),
-                        true /*validatePositionIncrease*/);
+        std::make_tuple(std::string("Write"), kAidlVersion1, 0, StreamTypeFilter::SYNC,
+                        makeBurstCommands(true), true /*validatePositionIncrease*/);
 static const NamedCommandSequence kWriteAsyncSeq =
-        std::make_tuple(std::string("Write"), 0, StreamTypeFilter::ASYNC, makeBurstCommands(false),
-                        true /*validatePositionIncrease*/);
+        std::make_tuple(std::string("Write"), kAidlVersion1, 0, StreamTypeFilter::ASYNC,
+                        makeBurstCommands(false), true /*validatePositionIncrease*/);
 
 std::shared_ptr<StateSequence> makeAsyncDrainCommands(bool isInput) {
     using State = StreamDescriptor::State;
@@ -4606,10 +4621,10 @@
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
 static const NamedCommandSequence kWriteDrainAsyncSeq = std::make_tuple(
-        std::string("WriteDrain"), kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
-        makeAsyncDrainCommands(false), false /*validatePositionIncrease*/);
+        std::string("WriteDrain"), kAidlVersion1, kStreamTransientStateTransitionDelayMs,
+        StreamTypeFilter::ASYNC, makeAsyncDrainCommands(false), false /*validatePositionIncrease*/);
 static const NamedCommandSequence kDrainInSeq =
-        std::make_tuple(std::string("Drain"), 0, StreamTypeFilter::ANY,
+        std::make_tuple(std::string("Drain"), kAidlVersion1, 0, StreamTypeFilter::ANY,
                         makeAsyncDrainCommands(true), false /*validatePositionIncrease*/);
 
 std::shared_ptr<StateSequence> makeDrainOutCommands(bool isSync) {
@@ -4631,12 +4646,28 @@
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
 static const NamedCommandSequence kDrainOutSyncSeq =
-        std::make_tuple(std::string("Drain"), 0, StreamTypeFilter::SYNC, makeDrainOutCommands(true),
-                        false /*validatePositionIncrease*/);
+        std::make_tuple(std::string("Drain"), kAidlVersion1, 0, StreamTypeFilter::SYNC,
+                        makeDrainOutCommands(true), false /*validatePositionIncrease*/);
 static const NamedCommandSequence kDrainOutAsyncSeq =
-        std::make_tuple(std::string("Drain"), 0, StreamTypeFilter::ASYNC,
+        std::make_tuple(std::string("Drain"), kAidlVersion3, 0, StreamTypeFilter::ASYNC,
                         makeDrainOutCommands(false), false /*validatePositionIncrease*/);
 
+std::shared_ptr<StateSequence> makeDrainEarlyOutCommands() {
+    using State = StreamDescriptor::State;
+    auto d = std::make_unique<StateDag>();
+    StateDag::Node last = d->makeFinalNode(State::IDLE);
+    StateDag::Node draining = d->makeNode(State::DRAINING, kDrainReadyEvent, last);
+    draining.children().push_back(d->makeNode(State::DRAINING, kGetStatusCommand, last));
+    StateDag::Node active = d->makeNode(State::ACTIVE, kDrainOutEarlyCommand, draining);
+    StateDag::Node idle = d->makeNode(State::IDLE, kBurstCommand, active);
+    idle.children().push_back(d->makeNode(State::TRANSFERRING, kTransferReadyEvent, active));
+    d->makeNode(State::STANDBY, kStartCommand, idle);
+    return std::make_shared<StateSequenceFollower>(std::move(d));
+}
+static const NamedCommandSequence kDrainEarlyOutAsyncSeq =
+        std::make_tuple(std::string("DrainEarly"), kAidlVersion3, 0, StreamTypeFilter::ASYNC,
+                        makeDrainEarlyOutCommands(), false /*validatePositionIncrease*/);
+
 std::shared_ptr<StateSequence> makeDrainPauseOutCommands(bool isSync) {
     using State = StreamDescriptor::State;
     auto d = std::make_unique<StateDag>();
@@ -4656,12 +4687,33 @@
     d->makeNode(State::STANDBY, kStartCommand, idle);
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
-static const NamedCommandSequence kDrainPauseOutSyncSeq = std::make_tuple(
-        std::string("DrainPause"), kStreamTransientStateTransitionDelayMs, StreamTypeFilter::SYNC,
-        makeDrainPauseOutCommands(true), false /*validatePositionIncrease*/);
-static const NamedCommandSequence kDrainPauseOutAsyncSeq = std::make_tuple(
-        std::string("DrainPause"), kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
-        makeDrainPauseOutCommands(false), false /*validatePositionIncrease*/);
+static const NamedCommandSequence kDrainPauseOutSyncSeq =
+        std::make_tuple(std::string("DrainPause"), kAidlVersion1,
+                        kStreamTransientStateTransitionDelayMs, StreamTypeFilter::SYNC,
+                        makeDrainPauseOutCommands(true), false /*validatePositionIncrease*/);
+static const NamedCommandSequence kDrainPauseOutAsyncSeq =
+        std::make_tuple(std::string("DrainPause"), kAidlVersion1,
+                        kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
+                        makeDrainPauseOutCommands(false), false /*validatePositionIncrease*/);
+
+std::shared_ptr<StateSequence> makeDrainEarlyPauseOutCommands() {
+    using State = StreamDescriptor::State;
+    auto d = std::make_unique<StateDag>();
+    StateDag::Node draining = d->makeNodes({std::make_pair(State::DRAINING, kPauseCommand),
+                                            std::make_pair(State::DRAIN_PAUSED, kStartCommand),
+                                            std::make_pair(State::DRAINING, kPauseCommand),
+                                            std::make_pair(State::DRAIN_PAUSED, kBurstCommand)},
+                                           State::TRANSFER_PAUSED);
+    StateDag::Node active = d->makeNode(State::ACTIVE, kDrainOutEarlyCommand, draining);
+    StateDag::Node idle = d->makeNode(State::IDLE, kBurstCommand, active);
+    idle.children().push_back(d->makeNode(State::TRANSFERRING, kDrainOutEarlyCommand, draining));
+    d->makeNode(State::STANDBY, kStartCommand, idle);
+    return std::make_shared<StateSequenceFollower>(std::move(d));
+}
+static const NamedCommandSequence kDrainEarlyPauseOutAsyncSeq =
+        std::make_tuple(std::string("DrainEarlyPause"), kAidlVersion3,
+                        kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
+                        makeDrainEarlyPauseOutCommands(), false /*validatePositionIncrease*/);
 
 // This sequence also verifies that the capture / presentation position is not reset on standby.
 std::shared_ptr<StateSequence> makeStandbyCommands(bool isInput, bool isSync) {
@@ -4703,14 +4755,15 @@
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
 static const NamedCommandSequence kStandbyInSeq =
-        std::make_tuple(std::string("Standby"), 0, StreamTypeFilter::ANY,
+        std::make_tuple(std::string("Standby"), kAidlVersion1, 0, StreamTypeFilter::ANY,
                         makeStandbyCommands(true, false), false /*validatePositionIncrease*/);
 static const NamedCommandSequence kStandbyOutSyncSeq =
-        std::make_tuple(std::string("Standby"), 0, StreamTypeFilter::SYNC,
+        std::make_tuple(std::string("Standby"), kAidlVersion1, 0, StreamTypeFilter::SYNC,
                         makeStandbyCommands(false, true), false /*validatePositionIncrease*/);
-static const NamedCommandSequence kStandbyOutAsyncSeq = std::make_tuple(
-        std::string("Standby"), kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
-        makeStandbyCommands(false, false), false /*validatePositionIncrease*/);
+static const NamedCommandSequence kStandbyOutAsyncSeq =
+        std::make_tuple(std::string("Standby"), kAidlVersion1,
+                        kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
+                        makeStandbyCommands(false, false), false /*validatePositionIncrease*/);
 
 std::shared_ptr<StateSequence> makePauseCommands(bool isInput, bool isSync) {
     using State = StreamDescriptor::State;
@@ -4745,14 +4798,15 @@
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
 static const NamedCommandSequence kPauseInSeq =
-        std::make_tuple(std::string("Pause"), 0, StreamTypeFilter::ANY,
+        std::make_tuple(std::string("Pause"), kAidlVersion1, 0, StreamTypeFilter::ANY,
                         makePauseCommands(true, false), false /*validatePositionIncrease*/);
 static const NamedCommandSequence kPauseOutSyncSeq =
-        std::make_tuple(std::string("Pause"), 0, StreamTypeFilter::SYNC,
+        std::make_tuple(std::string("Pause"), kAidlVersion1, 0, StreamTypeFilter::SYNC,
                         makePauseCommands(false, true), false /*validatePositionIncrease*/);
-static const NamedCommandSequence kPauseOutAsyncSeq = std::make_tuple(
-        std::string("Pause"), kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
-        makePauseCommands(false, false), false /*validatePositionIncrease*/);
+static const NamedCommandSequence kPauseOutAsyncSeq =
+        std::make_tuple(std::string("Pause"), kAidlVersion1, kStreamTransientStateTransitionDelayMs,
+                        StreamTypeFilter::ASYNC, makePauseCommands(false, false),
+                        false /*validatePositionIncrease*/);
 
 std::shared_ptr<StateSequence> makeFlushCommands(bool isInput, bool isSync) {
     using State = StreamDescriptor::State;
@@ -4780,14 +4834,15 @@
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
 static const NamedCommandSequence kFlushInSeq =
-        std::make_tuple(std::string("Flush"), 0, StreamTypeFilter::ANY,
+        std::make_tuple(std::string("Flush"), kAidlVersion1, 0, StreamTypeFilter::ANY,
                         makeFlushCommands(true, false), false /*validatePositionIncrease*/);
 static const NamedCommandSequence kFlushOutSyncSeq =
-        std::make_tuple(std::string("Flush"), 0, StreamTypeFilter::SYNC,
+        std::make_tuple(std::string("Flush"), kAidlVersion1, 0, StreamTypeFilter::SYNC,
                         makeFlushCommands(false, true), false /*validatePositionIncrease*/);
-static const NamedCommandSequence kFlushOutAsyncSeq = std::make_tuple(
-        std::string("Flush"), kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
-        makeFlushCommands(false, false), false /*validatePositionIncrease*/);
+static const NamedCommandSequence kFlushOutAsyncSeq =
+        std::make_tuple(std::string("Flush"), kAidlVersion1, kStreamTransientStateTransitionDelayMs,
+                        StreamTypeFilter::ASYNC, makeFlushCommands(false, false),
+                        false /*validatePositionIncrease*/);
 
 std::shared_ptr<StateSequence> makeDrainPauseFlushOutCommands(bool isSync) {
     using State = StreamDescriptor::State;
@@ -4807,13 +4862,13 @@
     return std::make_shared<StateSequenceFollower>(std::move(d));
 }
 static const NamedCommandSequence kDrainPauseFlushOutSyncSeq =
-        std::make_tuple(std::string("DrainPauseFlush"), kStreamTransientStateTransitionDelayMs,
-                        StreamTypeFilter::SYNC, makeDrainPauseFlushOutCommands(true),
-                        false /*validatePositionIncrease*/);
+        std::make_tuple(std::string("DrainPauseFlush"), kAidlVersion1,
+                        kStreamTransientStateTransitionDelayMs, StreamTypeFilter::SYNC,
+                        makeDrainPauseFlushOutCommands(true), false /*validatePositionIncrease*/);
 static const NamedCommandSequence kDrainPauseFlushOutAsyncSeq =
-        std::make_tuple(std::string("DrainPauseFlush"), kStreamTransientStateTransitionDelayMs,
-                        StreamTypeFilter::ASYNC, makeDrainPauseFlushOutCommands(false),
-                        false /*validatePositionIncrease*/);
+        std::make_tuple(std::string("DrainPauseFlush"), kAidlVersion1,
+                        kStreamTransientStateTransitionDelayMs, StreamTypeFilter::ASYNC,
+                        makeDrainPauseFlushOutCommands(false), false /*validatePositionIncrease*/);
 
 // Note, this isn't the "official" enum printer, it is only used to make the test name suffix.
 std::string PrintStreamFilterToString(StreamTypeFilter filter) {
@@ -4851,9 +4906,10 @@
         AudioStreamIoOutTest, AudioStreamIoOut,
         testing::Combine(testing::ValuesIn(android::getAidlHalInstanceNames(IModule::descriptor)),
                          testing::Values(kWriteSyncSeq, kWriteAsyncSeq, kWriteDrainAsyncSeq,
-                                         kDrainOutSyncSeq, kDrainPauseOutSyncSeq,
-                                         kDrainPauseOutAsyncSeq, kStandbyOutSyncSeq,
-                                         kStandbyOutAsyncSeq,
+                                         kDrainOutSyncSeq, kDrainOutAsyncSeq,
+                                         kDrainEarlyOutAsyncSeq, kDrainPauseOutSyncSeq,
+                                         kDrainPauseOutAsyncSeq, kDrainEarlyPauseOutAsyncSeq,
+                                         kStandbyOutSyncSeq, kStandbyOutAsyncSeq,
                                          kPauseOutSyncSeq,  // kPauseOutAsyncSeq,
                                          kFlushOutSyncSeq, kFlushOutAsyncSeq,
                                          kDrainPauseFlushOutSyncSeq, kDrainPauseFlushOutAsyncSeq),