diff --git a/audio/aidl/vts/VtsHalDownmixTargetTest.cpp b/audio/aidl/vts/VtsHalDownmixTargetTest.cpp
new file mode 100644
index 0000000..8612660
--- /dev/null
+++ b/audio/aidl/vts/VtsHalDownmixTargetTest.cpp
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "VtsHalDownmixTargetTest"
+
+#include <Utils.h>
+#include <aidl/Vintf.h>
+#include "EffectHelper.h"
+
+using namespace android;
+
+using aidl::android::hardware::audio::effect::Capability;
+using aidl::android::hardware::audio::effect::Descriptor;
+using aidl::android::hardware::audio::effect::Downmix;
+using aidl::android::hardware::audio::effect::IEffect;
+using aidl::android::hardware::audio::effect::IFactory;
+using aidl::android::hardware::audio::effect::kDownmixTypeUUID;
+using aidl::android::hardware::audio::effect::kEffectNullUuid;
+using aidl::android::hardware::audio::effect::Parameter;
+
+/**
+ * Here we focus on specific parameter checking, general IEffect interfaces testing performed in
+ * VtsAudioEffectTargetTest.
+ */
+enum ParamName { PARAM_INSTANCE_NAME, PARAM_TYPE };
+using DownmixParamTestParam =
+        std::tuple<std::pair<std::shared_ptr<IFactory>, Descriptor>, Downmix::Type>;
+
+// Testing for enum values
+const std::vector<Downmix::Type> kTypeValues = {Downmix::Type::STRIP, Downmix::Type::FOLD};
+
+class DownmixParamTest : public ::testing::TestWithParam<DownmixParamTestParam>,
+                         public EffectHelper {
+  public:
+    DownmixParamTest() : mParamType(std::get<PARAM_TYPE>(GetParam())) {
+        std::tie(mFactory, mDescriptor) = std::get<PARAM_INSTANCE_NAME>(GetParam());
+    }
+
+    void SetUp() override {
+        ASSERT_NE(nullptr, mFactory);
+        ASSERT_NO_FATAL_FAILURE(create(mFactory, mEffect, mDescriptor));
+
+        Parameter::Specific specific = getDefaultParamSpecific();
+        Parameter::Common common = EffectHelper::createParamCommon(
+                0 /* session */, 1 /* ioHandle */, 44100 /* iSampleRate */, 44100 /* oSampleRate */,
+                kInputFrameCount /* iFrameCount */, kOutputFrameCount /* oFrameCount */);
+        IEffect::OpenEffectReturn ret;
+        ASSERT_NO_FATAL_FAILURE(open(mEffect, common, specific, &ret, EX_NONE));
+        ASSERT_NE(nullptr, mEffect);
+    }
+
+    void TearDown() override {
+        ASSERT_NO_FATAL_FAILURE(close(mEffect));
+        ASSERT_NO_FATAL_FAILURE(destroy(mFactory, mEffect));
+    }
+
+    static const long kInputFrameCount = 0x100, kOutputFrameCount = 0x100;
+    std::shared_ptr<IFactory> mFactory;
+    std::shared_ptr<IEffect> mEffect;
+    Descriptor mDescriptor;
+    Downmix::Type mParamType = Downmix::Type::STRIP;
+
+    void SetAndGetDownmixParameters() {
+        for (auto& it : mTags) {
+            auto& tag = it.first;
+            auto& dm = it.second;
+
+            // set parameter
+            Parameter expectParam;
+            Parameter::Specific specific;
+            specific.set<Parameter::Specific::downmix>(dm);
+            expectParam.set<Parameter::specific>(specific);
+            // All values are valid, set parameter should succeed
+            EXPECT_STATUS(EX_NONE, mEffect->setParameter(expectParam)) << expectParam.toString();
+
+            // get parameter
+            Parameter getParam;
+            Parameter::Id id;
+            Downmix::Id dmId;
+            dmId.set<Downmix::Id::commonTag>(tag);
+            id.set<Parameter::Id::downmixTag>(dmId);
+            EXPECT_STATUS(EX_NONE, mEffect->getParameter(id, &getParam));
+
+            EXPECT_EQ(expectParam, getParam);
+        }
+    }
+
+    void addTypeParam(Downmix::Type type) {
+        Downmix dm;
+        dm.set<Downmix::type>(type);
+        mTags.push_back({Downmix::type, dm});
+    }
+
+    Parameter::Specific getDefaultParamSpecific() {
+        Downmix dm = Downmix::make<Downmix::type>(Downmix::Type::STRIP);
+        Parameter::Specific specific = Parameter::Specific::make<Parameter::Specific::downmix>(dm);
+        return specific;
+    }
+
+  private:
+    std::vector<std::pair<Downmix::Tag, Downmix>> mTags;
+    void CleanUp() { mTags.clear(); }
+};
+
+TEST_P(DownmixParamTest, SetAndGetType) {
+    EXPECT_NO_FATAL_FAILURE(addTypeParam(mParamType));
+    SetAndGetDownmixParameters();
+}
+
+INSTANTIATE_TEST_SUITE_P(
+        DownmixTest, DownmixParamTest,
+        ::testing::Combine(testing::ValuesIn(EffectFactoryHelper::getAllEffectDescriptors(
+                                   IFactory::descriptor, kDownmixTypeUUID)),
+                           testing::ValuesIn(kTypeValues)),
+        [](const testing::TestParamInfo<DownmixParamTest::ParamType>& info) {
+            auto descriptor = std::get<PARAM_INSTANCE_NAME>(info.param).second;
+            std::string type = std::to_string(static_cast<int>(std::get<PARAM_TYPE>(info.param)));
+            std::string name = "Implementor_" + descriptor.common.implementor + "_name_" +
+                               descriptor.common.name + "_UUID_" +
+                               descriptor.common.id.uuid.toString() + "_type" + type;
+            std::replace_if(
+                    name.begin(), name.end(), [](const char c) { return !std::isalnum(c); }, '_');
+            return name;
+        });
+
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(DownmixParamTest);
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    ABinderProcess_setThreadPoolMaxThreadCount(1);
+    ABinderProcess_startThreadPool();
+    return RUN_ALL_TESTS();
+}