diff --git a/audio/effect/2.0/ILoudnessEnhancerEffect.hal b/audio/effect/2.0/ILoudnessEnhancerEffect.hal
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+++ b/audio/effect/2.0/ILoudnessEnhancerEffect.hal
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+package android.hardware.audio.effect@2.0;
+
+import android.hardware.audio.common@2.0;
+import IEffect;
+
+interface ILoudnessEnhancerEffect extends IEffect {
+    /*
+     * Sets target gain expressed in millibels.
+     */
+    setTargetGain(int32_t targetGainMb) generates (Result retval);
+
+    /*
+     * Gets target gain expressed in millibels.
+     */
+    getTargetGain() generates (Result retval, int32_t targetGainMb);
+};