diff --git a/source/use_case/noise_reduction/src/MainLoop.cc b/source/use_case/noise_reduction/src/MainLoop.cc
new file mode 100644
index 0000000..ee0a61b
--- /dev/null
+++ b/source/use_case/noise_reduction/src/MainLoop.cc
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "hal.h"                    /* Brings in platform definitions. */
+#include "UseCaseHandler.hpp"       /* Handlers for different user options. */
+#include "UseCaseCommonUtils.hpp"   /* Utils functions. */
+#include "RNNoiseModel.hpp"         /* Model class for running inference. */
+#include "InputFiles.hpp"           /* For input audio clips. */
+#include "RNNoiseProcess.hpp"       /* Pre-processing class */
+
+enum opcodes
+{
+    MENU_OPT_RUN_INF_NEXT = 1,       /* Run on next vector. */
+    MENU_OPT_RUN_INF_CHOSEN,         /* Run on a user provided vector index. */
+    MENU_OPT_RUN_INF_ALL,            /* Run inference on all. */
+    MENU_OPT_SHOW_MODEL_INFO,        /* Show model info. */
+    MENU_OPT_LIST_AUDIO_CLIPS        /* List the current baked audio clip features. */
+};
+
+static void DisplayMenu()
+{
+    printf("\n\n");
+    printf("User input required\n");
+    printf("Enter option number from:\n\n");
+    printf("  %u. Run noise reduction on the next WAV\n", MENU_OPT_RUN_INF_NEXT);
+    printf("  %u. Run noise reduction on a WAV at chosen index\n", MENU_OPT_RUN_INF_CHOSEN);
+    printf("  %u. Run noise reduction on all WAVs\n", MENU_OPT_RUN_INF_ALL);
+    printf("  %u. Show NN model info\n", MENU_OPT_SHOW_MODEL_INFO);
+    printf("  %u. List audio clips\n\n", MENU_OPT_LIST_AUDIO_CLIPS);
+    printf("  Choice: ");
+    fflush(stdout);
+}
+
+static bool SetAppCtxClipIdx(arm::app::ApplicationContext& ctx, uint32_t idx)
+{
+    if (idx >= NUMBER_OF_FILES) {
+        printf_err("Invalid idx %" PRIu32 " (expected less than %u)\n",
+                   idx, NUMBER_OF_FILES);
+        return false;
+    }
+    ctx.Set<uint32_t>("clipIndex", idx);
+    return true;
+}
+
+void main_loop(hal_platform& platform)
+{
+    arm::app::RNNoiseModel model;  /* Model wrapper object. */
+
+    bool executionSuccessful = true;
+    constexpr bool bUseMenu = NUMBER_OF_FILES > 1 ? true : false;
+
+    /* Load the model. */
+    if (!model.Init()) {
+        printf_err("Failed to initialise model\n");
+        return;
+    }
+    /* Instantiate application context. */
+    arm::app::ApplicationContext caseContext;
+
+    arm::app::Profiler profiler{&platform, "noise_reduction"};
+    caseContext.Set<arm::app::Profiler&>("profiler", profiler);
+
+    caseContext.Set<hal_platform&>("platform", platform);
+    caseContext.Set<uint32_t>("numInputFeatures", g_NumInputFeatures);
+    caseContext.Set<uint32_t>("frameLength", g_FrameLength);
+    caseContext.Set<uint32_t>("frameStride", g_FrameStride);
+    caseContext.Set<arm::app::RNNoiseModel&>("model", model);
+    SetAppCtxClipIdx(caseContext, 0);
+
+#if defined(MEM_DUMP_BASE_ADDR) && defined(MPS3_PLATFORM)
+    /* For this use case, for valid targets, we dump contents
+     * of the output tensor to a certain location in memory to
+     * allow offline tools to pick this data up. */
+    constexpr size_t memDumpMaxLen = MEM_DUMP_LEN;
+    uint8_t* memDumpBaseAddr = reinterpret_cast<uint8_t *>(MEM_DUMP_BASE_ADDR);
+    size_t memDumpBytesWritten = 0;
+    caseContext.Set<size_t>("MEM_DUMP_LEN", memDumpMaxLen);
+    caseContext.Set<uint8_t*>("MEM_DUMP_BASE_ADDR", memDumpBaseAddr);
+    caseContext.Set<size_t*>("MEM_DUMP_BYTE_WRITTEN", &memDumpBytesWritten);
+#endif /* defined(MEM_DUMP_BASE_ADDR) && defined(MPS3_PLATFORM) */
+    /* Loop. */
+    do {
+        int menuOption = MENU_OPT_RUN_INF_NEXT;
+
+        if (bUseMenu) {
+            DisplayMenu();
+            menuOption = arm::app::ReadUserInputAsInt(platform);
+            printf("\n");
+        }
+        switch (menuOption) {
+            case MENU_OPT_RUN_INF_NEXT:
+                executionSuccessful = NoiseReductionHandler(caseContext, false);
+                break;
+            case MENU_OPT_RUN_INF_CHOSEN: {
+                printf("    Enter the audio clip IFM index [0, %d]: ", NUMBER_OF_FILES-1);
+                auto clipIndex = static_cast<uint32_t>(arm::app::ReadUserInputAsInt(platform));
+                SetAppCtxClipIdx(caseContext, clipIndex);
+                executionSuccessful = NoiseReductionHandler(caseContext, false);
+                break;
+            }
+            case MENU_OPT_RUN_INF_ALL:
+                executionSuccessful = NoiseReductionHandler(caseContext, true);
+                break;
+            case MENU_OPT_SHOW_MODEL_INFO:
+                executionSuccessful = model.ShowModelInfoHandler();
+                break;
+            case MENU_OPT_LIST_AUDIO_CLIPS:
+                executionSuccessful = ListFilesHandler(caseContext);
+                break;
+            default:
+                printf("Incorrect choice, try again.");
+                break;
+        }
+    } while (executionSuccessful && bUseMenu);
+    info("Main loop terminated.\n");
+}
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