diff --git a/audio/aidl/default/ModulePrimary.cpp b/audio/aidl/default/ModulePrimary.cpp
new file mode 100644
index 0000000..cbb6730
--- /dev/null
+++ b/audio/aidl/default/ModulePrimary.cpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+#include <vector>
+
+#define LOG_TAG "AHAL_ModulePrimary"
+#include <Utils.h>
+#include <android-base/logging.h>
+
+#include "core-impl/ModulePrimary.h"
+#include "core-impl/StreamStub.h"
+#include "core-impl/Telephony.h"
+
+using aidl::android::hardware::audio::common::SinkMetadata;
+using aidl::android::hardware::audio::common::SourceMetadata;
+using aidl::android::media::audio::common::AudioOffloadInfo;
+using aidl::android::media::audio::common::AudioPort;
+using aidl::android::media::audio::common::AudioPortConfig;
+using aidl::android::media::audio::common::MicrophoneInfo;
+
+namespace aidl::android::hardware::audio::core {
+
+ndk::ScopedAStatus ModulePrimary::getTelephony(std::shared_ptr<ITelephony>* _aidl_return) {
+    if (!mTelephony) {
+        mTelephony = ndk::SharedRefBase::make<Telephony>();
+    }
+    *_aidl_return = mTelephony.getPtr();
+    LOG(DEBUG) << __func__ << ": returning instance of ITelephony: " << _aidl_return->get();
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus ModulePrimary::createInputStream(const SinkMetadata& sinkMetadata,
+                                                    StreamContext&& context,
+                                                    const std::vector<MicrophoneInfo>& microphones,
+                                                    std::shared_ptr<StreamIn>* result) {
+    return createStreamInstance<StreamInStub>(result, sinkMetadata, std::move(context),
+                                              microphones);
+}
+
+ndk::ScopedAStatus ModulePrimary::createOutputStream(
+        const SourceMetadata& sourceMetadata, StreamContext&& context,
+        const std::optional<AudioOffloadInfo>& offloadInfo, std::shared_ptr<StreamOut>* result) {
+    return createStreamInstance<StreamOutStub>(result, sourceMetadata, std::move(context),
+                                               offloadInfo);
+}
+
+}  // namespace aidl::android::hardware::audio::core