diff --git a/soundtrigger/2.1/ISoundTriggerHw.hal b/soundtrigger/2.1/ISoundTriggerHw.hal
index 2f2e73a..a9796d8 100644
--- a/soundtrigger/2.1/ISoundTriggerHw.hal
+++ b/soundtrigger/2.1/ISoundTriggerHw.hal
@@ -92,7 +92,7 @@
      * @return modelHandle A unique handle assigned by the HAL for use by the
      *     framework when controlling activity for this sound model.
      */
-    @callflow(next={"startRecognition_2_1", "setSoundModelParameters", "unloadSoundModel"})
+    @callflow(next={"startRecognition_2_1", "unloadSoundModel"})
     loadSoundModel_2_1(SoundModel soundModel,
                    ISoundTriggerHwCallback callback,
                    CallbackCookie cookie)
@@ -126,7 +126,7 @@
      * @return modelHandle A unique handle assigned by the HAL for use by the
      *     framework when controlling activity for this sound model.
      */
-    @callflow(next={"startRecognition_2_1", "setSoundModelParameters", "unloadSoundModel"})
+    @callflow(next={"startRecognition_2_1", "unloadSoundModel"})
     loadPhraseSoundModel_2_1(PhraseSoundModel soundModel,
                    ISoundTriggerHwCallback callback,
                    CallbackCookie cookie)
@@ -161,74 +161,4 @@
                      ISoundTriggerHwCallback callback,
                      CallbackCookie cookie)
             generates (int32_t retval);
-
-
-    struct ParameterValue {
-        string key;
-        string value;
-    };
-
-    /**
-     * Generic method for retrieving vendor-specific parameter values.
-     * The framework does not interpret the parameters, they are passed
-     * in an opaque manner between a vendor application and HAL.
-     *
-     * @param keys parameter keys.
-     * @return retval Operation completion status: 0 in case of success,
-     *     -EINVAL in case of invalid keys,
-     *     -ENOSYS in case if this operation is not supported,
-     *     -ENOMEM in case of memory allocation failure,
-     *     -ENODEV in case of initialization error.
-     * @return parameters parameter key value pairs.
-     */
-    getParameters(vec<string> keys)
-            generates (int32_t retval, vec<ParameterValue> parameters);
-
-    /**
-     * Generic method for setting vendor-specific parameter values.
-     * The framework does not interpret the parameters, they are passed
-     * in an opaque manner between a vendor application and HAL.
-     *
-     * @param parameters parameter key value pairs.
-     * @return retval Operation completion status: 0 in case of success,
-     *     -EINVAL in case of invalid keys,
-     *     -ENOSYS in case if this operation is not supported,
-     *     -ENOMEM in case of memory allocation failure,
-     *     -ENODEV in case of initialization error.
-     */
-    setParameters(vec<ParameterValue> parameters) generates (int32_t retval);
-
-    /**
-     * Generic method for retrieving vendor-specific parameter values.
-     * The framework does not interpret the parameters, they are passed
-     * in an opaque manner between a vendor application and HAL.
-     *
-     * @param modelHandle the handle of the sound model to get parameters about.
-     * @param keys parameter keys.
-     * @return retval Operation completion status: 0 in case of success,
-     *     -EINVAL in case of invalid keys,
-     *     -ENOSYS in case if this operation is not supported,
-     *     -ENOMEM in case of memory allocation failure,
-     *     -ENODEV in case of initialization error.
-     * @return parameters parameter key value pairs.
-     */
-    getSoundModelParameters(SoundModelHandle modelHandle, vec<string> keys)
-            generates (int32_t retval, vec<ParameterValue> parameters);
-
-    /**
-     * Generic method for setting vendor-specific parameter values.
-     * The framework does not interpret the parameters, they are passed
-     * in an opaque manner between a vendor application and HAL.
-     *
-     * @param modelHandle the handle of the sound model to set parameters for.
-     * @param parameters parameter key value pairs.
-     * @return retval Operation completion status: 0 in case of success,
-     *     -EINVAL in case of invalid keys,
-     *     -ENOSYS in case if this operation is not supported,
-     *     -ENOMEM in case of memory allocation failure,
-     *     -ENODEV in case of initialization error.
-     */
-    setSoundModelParameters(
-            SoundModelHandle modelHandle, vec<ParameterValue> parameters)
-            generates (int32_t retval);
 };
diff --git a/soundtrigger/2.1/default/SoundTriggerHw.h b/soundtrigger/2.1/default/SoundTriggerHw.h
index 855d1a6..a5515eb 100644
--- a/soundtrigger/2.1/default/SoundTriggerHw.h
+++ b/soundtrigger/2.1/default/SoundTriggerHw.h
@@ -102,26 +102,6 @@
                                              int32_t /*cookie*/) override {
             return mImpl->startRecognition_2_1(modelHandle, config);
         }
-        Return<void> getParameters(const hidl_vec<hidl_string>& /*keys*/,
-                                   getParameters_cb _hidl_cb) override {
-            _hidl_cb(-ENOSYS, hidl_vec<ParameterValue>());
-            return Void();
-        }
-        Return<int32_t> setParameters(
-            const hidl_vec<V2_1::ISoundTriggerHw::ParameterValue>& /*parameters*/) override {
-            return -ENOSYS;
-        }
-        Return<void> getSoundModelParameters(int32_t /*modelHandle*/,
-                                             const hidl_vec<hidl_string>& /*keys*/,
-                                             getSoundModelParameters_cb _hidl_cb) override {
-            _hidl_cb(-ENOSYS, hidl_vec<ParameterValue>());
-            return Void();
-        }
-        Return<int32_t> setSoundModelParameters(
-            int32_t /*modelHandle*/,
-            const hidl_vec<V2_1::ISoundTriggerHw::ParameterValue>& /*parameters*/) override {
-            return -ENOSYS;
-        }
 
        private:
         sp<SoundTriggerHw> mImpl;
diff --git a/soundtrigger/2.1/vts/functional/VtsHalSoundtriggerV2_1TargetTest.cpp b/soundtrigger/2.1/vts/functional/VtsHalSoundtriggerV2_1TargetTest.cpp
index 9876cdd..fdd5f0d 100644
--- a/soundtrigger/2.1/vts/functional/VtsHalSoundtriggerV2_1TargetTest.cpp
+++ b/soundtrigger/2.1/vts/functional/VtsHalSoundtriggerV2_1TargetTest.cpp
@@ -51,7 +51,6 @@
 using V2_0_ISoundTriggerHwCallback =
     ::android::hardware::soundtrigger::V2_0::ISoundTriggerHwCallback;
 using ::android::hardware::soundtrigger::V2_1::ISoundTriggerHw;
-using ParameterValue = ::android::hardware::soundtrigger::V2_1::ISoundTriggerHw::ParameterValue;
 using ::android::hardware::soundtrigger::V2_1::ISoundTriggerHwCallback;
 using ::android::hidl::allocator::V1_0::IAllocator;
 using ::android::hidl::memory::V1_0::IMemory;
@@ -481,78 +480,3 @@
     EXPECT_TRUE(hidlReturn.isOk());
     EXPECT_TRUE(hidlReturn == 0 || hidlReturn == -ENOSYS);
 }
-
-/**
- * Test ISoundTriggerHw::getParameters() and setParameters() methods
- *
- * Verifies that:
- *  - the implementation implements these optional methods or indicates it is not supported by
- *  returning -ENOSYS
- */
-TEST_F(SoundTriggerHidlTest, getAndSetParameters) {
-    hidl_vec<hidl_string> keys;
-    hidl_vec<ParameterValue> values;
-
-    int32_t ret = -ENODEV;
-    Return<void> hidlReturn =
-        mSoundTriggerHal->getParameters(keys, [&](int32_t retval, auto params) {
-            ret = retval;
-            values = params;
-        });
-    EXPECT_TRUE(hidlReturn.isOk());
-    EXPECT_TRUE(ret == 0 || ret == -ENOSYS);
-    if (ret == 0) {
-        Return<int32_t> hidlReturn = mSoundTriggerHal->setParameters(values);
-        EXPECT_TRUE(hidlReturn.isOk());
-        EXPECT_EQ(0, hidlReturn);
-    }
-}
-
-/**
- * Test ISoundTriggerHw::setParameters() method
- *
- * Verifies that:
- *  - the implementation accepts empty parameters to be set or indicates it is not supported by
- *  returning -ENOSYS
- */
-TEST_F(SoundTriggerHidlTest, setParameters) {
-    hidl_vec<ParameterValue> values;
-    Return<int32_t> hidlReturn = mSoundTriggerHal->setParameters(values);
-    EXPECT_TRUE(hidlReturn.isOk());
-    EXPECT_TRUE(hidlReturn == 0 || hidlReturn == -ENOSYS);
-}
-
-/**
- * Test ISoundTriggerHw::getSoundModelParameters() and setSoundModelParameters() methods
- *
- * Verifies that:
- *  - the implementation implements these optional methods or indicates it is not supported by
- *  returning -ENOSYS;
- *  - if the methods are supported, the implementation returns an error when called without
- *  an active recognition running.
- *
- */
-TEST_F(SoundTriggerHidlTest, getAndSetSoundModelParameters) {
-    SoundModelHandle handle = 0;
-    hidl_vec<hidl_string> keys;
-    hidl_vec<ParameterValue> values;
-
-    {
-        int32_t ret = 0;
-        Return<void> hidlReturn = mSoundTriggerHal->getSoundModelParameters(
-            handle, keys, [&](int32_t retval, auto params) {
-                ret = retval;
-                values = params;
-            });
-        EXPECT_TRUE(hidlReturn.isOk());
-        EXPECT_NE(0, ret);
-        EXPECT_EQ(0u, values.size());
-    }
-
-    values.resize(0);
-    {
-        Return<int32_t> hidlReturn = mSoundTriggerHal->setSoundModelParameters(handle, values);
-        EXPECT_TRUE(hidlReturn.isOk());
-        EXPECT_NE(0, hidlReturn);
-    }
-}