diff --git a/lmdk/libraries/dummy/CMakeLists.txt b/lmdk/libraries/dummy/CMakeLists.txt
index 32cbd134dfae..fdb963483976 100644
--- a/lmdk/libraries/dummy/CMakeLists.txt
+++ b/lmdk/libraries/dummy/CMakeLists.txt
@@ -10,10 +10,4 @@ set(MODULES_LIST dummy)
 # toml file for rimage to generate manifets
 set(TOML "${CMAKE_CURRENT_LIST_DIR}/dummy_mtl.toml")
 
-# TODO: Move it somewhere?! This probably should be defined in some API header file!
-# SOF loadable modules API version
-add_definitions(-DMAJOR_IADSP_API_VERSION=5)
-add_definitions(-DMIDDLE_IADSP_API_VERSION=0)
-add_definitions(-DMINOR_IADSP_API_VERSION=0)
-
 include(../../cmake/build.cmake)
diff --git a/lmdk/libraries/dwmix/CMakeLists.txt b/lmdk/libraries/dwmix/CMakeLists.txt
new file mode 100644
index 000000000000..4f1718c7432c
--- /dev/null
+++ b/lmdk/libraries/dwmix/CMakeLists.txt
@@ -0,0 +1,13 @@
+
+cmake_minimum_required(VERSION 3.20)
+set(CMAKE_TOOLCHAIN_FILE "${CMAKE_CURRENT_LIST_DIR}/../../cmake/xtensa-toolchain.cmake")
+
+project(dwmix)
+
+# list of modules to be built and included into this loadable library
+set(MODULES_LIST down_mixer)
+
+# toml file for rimage to generate manifets
+set(TOML "${CMAKE_CURRENT_LIST_DIR}/dwmix_mtl.toml")
+
+include(../../cmake/build.cmake)
diff --git a/lmdk/libraries/dwmix/dwmix_mtl.toml b/lmdk/libraries/dwmix/dwmix_mtl.toml
new file mode 100644
index 000000000000..e79c1260a139
--- /dev/null
+++ b/lmdk/libraries/dwmix/dwmix_mtl.toml
@@ -0,0 +1,78 @@
+version = [3, 0]
+
+[adsp]
+name = "mtl"
+image_size = "0x2C0000" # (22) bank * 128KB
+alias_mask = "0xE0000000"
+
+[[adsp.mem_zone]]
+type = "ROM"
+base = "0x1FF80000"
+size = "0x400"
+[[adsp.mem_zone]]
+type = "IMR"
+base = "0xA104A000"
+size = "0x2000"
+[[adsp.mem_zone]]
+type = "SRAM"
+base = "0xa00f0000"
+size = "0x100000"
+
+[[adsp.mem_alias]]
+type = "uncached"
+base = "0x40000000"
+[[adsp.mem_alias]]
+type = "cached"
+base = "0xA0000000"
+
+[cse]
+partition_name = "ADSP"
+[[cse.entry]]
+name = "ADSP.man"
+offset = "0x5c"
+length = "0x464"
+[[cse.entry]]
+name = "ADSP.met"
+offset = "0x4c0"
+length = "0x70"
+[[cse.entry]]
+name = "ADSP"
+offset = "0x540"
+length = "0x0"  # calculated by rimage
+
+[css]
+
+[signed_pkg]
+name = "ADSP"
+[[signed_pkg.module]]
+name = "ADSP.met"
+
+[adsp_file]
+[[adsp_file.comp]]
+base_offset = "0x2000"
+
+[fw_desc.header]
+name = "ADSPFW"
+load_offset = "0x40000"
+
+[module]
+count = 1
+
+	[[module.entry]]
+	name = "DWMIX"
+	uuid = "1234F1F1-1234-1A34-8C08-884BE5D14FAA"
+	affinity_mask = "0x1"
+	instance_count = "15"
+	domain_types = "0"
+	load_type = "0"
+	module_type = "9"
+	auto_start = "0"
+	sched_caps = [1, 0x00008000]
+
+	# pin = [dir, type, sample rate, size, container, channel-cfg]
+	pin = [0, 0, 0xffff, 0xc, 0xC, 0xffff,
+			0, 0, 0xffff, 0xc, 0xC, 0xffff,
+			1, 0, 0xffff, 0xc, 0xC, 0xffff]
+
+	# mod_cfg [PAR_0 PAR_1 PAR_2 PAR_3 IS_BYTES CPS IBS OBS MOD_FLAGS CPC OBLS]
+	mod_cfg = [0, 0, 0, 0, 4096, 1000000, 512, 256, 0, 0, 0]
diff --git a/lmdk/modules/down_mixer/CMakeLists.txt b/lmdk/modules/down_mixer/CMakeLists.txt
new file mode 100644
index 000000000000..d51f04cd13e4
--- /dev/null
+++ b/lmdk/modules/down_mixer/CMakeLists.txt
@@ -0,0 +1,6 @@
+
+target_sources(down_mixer PRIVATE downmixer.c)
+
+set_target_properties(down_mixer PROPERTIES
+	HPSRAM_ADDR "0xa0691000"
+)
diff --git a/lmdk/modules/down_mixer/downmixer.c b/lmdk/modules/down_mixer/downmixer.c
new file mode 100644
index 000000000000..2775e1d581f3
--- /dev/null
+++ b/lmdk/modules/down_mixer/downmixer.c
@@ -0,0 +1,520 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright(c) 2023 Intel Corporation. All rights reserved.
+ * Author: Adrian Warecki <adrian.warecki@intel.com>
+ */
+
+#include <string.h>
+#include <stdint.h>
+#include <stddef.h>
+
+#include <module/base.h>
+#include <module/api_ver.h>
+#include <iadk/adsp_error_code.h>
+#include <rimage/sof/user/manifest.h>
+#include <audio/source_api.h>
+#include <audio/sink_api.h>
+
+#include "downmixer.h"
+
+/* Logging is temporary disabled */
+#define LOG_MESSAGE(...) 
+
+static const struct native_system_agent *native_sys_agent;
+static struct module_self_data self_data;
+
+/**
+ * Module specific initialization procedure.
+ */
+static int downmix_init(struct processing_module *mod)
+{
+	struct module_data *mod_data = &mod->priv;
+	const struct module_config *dst = &mod_data->cfg;
+	const struct ipc4_base_module_extended_cfg * const down_mixer = dst->init_data;
+	struct up_down_mixer_data *cd;
+	int i;
+
+	if (dst->size < sizeof(*down_mixer))
+	{
+		LOG_MESSAGE(CRITICAL, "Invalid module config size received (%d)",
+			    LOG_ENTRY, dst->size);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* count of input pins formats */
+	const size_t in_pins_format_count = down_mixer->base_cfg_ext.nb_input_pins;
+
+	/* count of output pins formats */
+	const size_t out_pins_format_count = down_mixer->base_cfg_ext.nb_output_pins;
+
+	if (dst->size < sizeof(struct ipc4_base_module_cfg) +
+	    ipc4_calc_base_module_cfg_ext_size(in_pins_format_count, out_pins_format_count))
+	{
+		LOG_MESSAGE(CRITICAL, "Invalid module config size received (%d)",
+			    LOG_ENTRY, dst->size);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that at least 1 audio format has been retrieved for 1 input pin
+	 * and there are no more audio formats than the module input pins count. */
+	if ((in_pins_format_count < 1) || (in_pins_format_count > INPUT_NUMBER)) {
+		LOG_MESSAGE(CRITICAL, "Invalid count of input pin formats received (%d)",
+			    LOG_ENTRY, in_pins_format_count);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that one audio format is available for the output pin */
+	if (out_pins_format_count != 1) {
+		LOG_MESSAGE(CRITICAL, "Invalid count of output pin formats received (%d)",
+			    LOG_ENTRY, out_pins_format_count);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	const struct ipc4_input_pin_format *const input_formats =
+		(const struct ipc4_input_pin_format *const)down_mixer->base_cfg_ext.pin_formats;
+
+	const struct ipc4_output_pin_format *const output_formats =
+		(const struct ipc4_output_pin_format *const)&input_formats[in_pins_format_count];
+
+	const struct ipc4_output_pin_format output_pin_format = output_formats[0];
+
+	/* check that output audio format is for output pin0 */
+	if (output_pin_format.pin_index != 0) {
+		LOG_MESSAGE(CRITICAL, "Retrieved audio format is associated to an invalid output pin index (%d)",
+			    LOG_ENTRY, output_pin_format.pin_index);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* array of input audio format indexed by the input pin index. */
+	struct ipc4_input_pin_format input_pin_format[INPUT_NUMBER];
+
+	/* initialize each ibs to 0 to indicate that pin format has not yet been configured. */
+	for (int i = 0 ; i < INPUT_NUMBER ; i++)
+		input_pin_format[i].ibs = 0;
+
+	for (i = 0 ; i < in_pins_format_count ; i++) {
+		const struct ipc4_input_pin_format *const pin_format = &input_formats[i];
+
+		/* check that audio format retrieved for input is assigned
+		 * to an existing module pin. */
+		if (pin_format->pin_index >= INPUT_NUMBER)
+		{
+			LOG_MESSAGE(CRITICAL,
+				    "Retrieved audio format is associated to an invalid input pin index (%d)",
+				    LOG_ENTRY, pin_format->pin_index);
+			return ADSP_INVALID_SETTINGS;
+		}
+
+		input_pin_format[pin_format->pin_index] = *pin_format;
+	}
+
+	/* check that at least input pin0 has an audio format */
+	if (!input_pin_format[0].ibs) {
+		LOG_MESSAGE(CRITICAL, "Input pin 0 is not configured", LOG_ENTRY);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that input pin 0 and output pin 0 have compatible audio format */
+	if (input_pin_format[0].audio_fmt.sampling_frequency !=
+	    output_pin_format.audio_fmt.sampling_frequency ||
+	    input_pin_format[0].audio_fmt.depth != output_pin_format.audio_fmt.depth) {
+		LOG_MESSAGE(CRITICAL, "Input pin0 and output pin0 formats have incompatible audio format: "
+			    "input_freq = %d, output_freq = %d, input_bit_depth = %d, output_bit_depth = %d.",
+			    LOG_ENTRY, input_pin_format[0].audio_fmt.sampling_frequency,
+			    output_pin_format.audio_fmt.sampling_frequency,
+			    input_pin_format[0].audio_fmt.depth,
+			    output_pin_format.audio_fmt.depth);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that input pin 0 has a supported channels count */
+	if ((input_pin_format[0].audio_fmt.channels_count!= 1)
+	    && (input_pin_format[0].audio_fmt.channels_count!= 2)
+	    && (input_pin_format[0].audio_fmt.channels_count!= 3)
+	    && (input_pin_format[0].audio_fmt.channels_count!= 4)) {
+		LOG_MESSAGE(CRITICAL, "Input pin0 format has unsupported channels count (%d)",
+			    LOG_ENTRY, input_pin_format[0].audio_fmt.channels_count);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that bit_depth value is supported */
+	if ((output_pin_format.audio_fmt.depth != IPC4_DEPTH_16BIT) &&
+	    (output_pin_format.audio_fmt.depth != IPC4_DEPTH_32BIT)) {
+		LOG_MESSAGE(CRITICAL, " bit depth in audio format is not supported (%d)",
+			    LOG_ENTRY, output_pin_format.audio_fmt.depth);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that output pin has a supported channels count */
+	if ((output_pin_format.audio_fmt.channels_count != 1)
+	    && (output_pin_format.audio_fmt.channels_count != 2)) {
+		LOG_MESSAGE(CRITICAL, "Output pin format has unsupported channels count (%d)",
+			    LOG_ENTRY, output_pin_format.audio_fmt.channels_count);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that pin 0 ibs can be divided by the bytes size of "samples group" */
+	if ((input_pin_format[0].ibs * 8) % (input_pin_format[0].audio_fmt.depth *
+					     input_pin_format[0].audio_fmt.channels_count)) {
+		LOG_MESSAGE(CRITICAL, "ibs0*8 shall be a multiple of samples group value: "
+			    "ibs = %d, input_bit_depth = %d.",
+			    LOG_ENTRY, input_pin_format[0].ibs,
+			    input_pin_format[0].audio_fmt.depth);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	/* check that obs can be divided by the "bit_depth" settings value */
+	if ((output_pin_format.obs * 8) % (output_pin_format.audio_fmt.depth *
+					   output_pin_format.audio_fmt.channels_count)) {
+		LOG_MESSAGE(CRITICAL, "obs0*8 shall be a multiple of samples group value"
+			    "obs = %d, output_bit_depth = %d.",
+			    LOG_ENTRY, output_pin_format.obs,
+			    output_pin_format.audio_fmt.depth);
+		return ADSP_INVALID_SETTINGS;
+	}
+
+	if (input_pin_format[1].ibs) {
+		/* if some audio format is available to configure the input pin 1
+		 * check that input pin 0 and pin 1 have compatible audio format */
+		if ((input_pin_format[0].audio_fmt.sampling_frequency !=
+		     input_pin_format[1].audio_fmt.sampling_frequency) ||
+		    (input_pin_format[0].audio_fmt.depth != input_pin_format[1].audio_fmt.depth)) {
+			LOG_MESSAGE(CRITICAL, "Input pin0 and input pin1 formats have incompatible audio format : "
+				    "input_freq[0] = %d, input_freq[1] = %d, input_bit_depth[0] = %d, input_bit_depth[1] = %d.",
+				    LOG_ENTRY, input_pin_format[0].audio_fmt.sampling_frequency,
+				    input_pin_format[1].audio_fmt.sampling_frequency,
+				    input_pin_format[0].audio_fmt.depth,
+				    input_pin_format[1].audio_fmt.depth);
+			return ADSP_INVALID_SETTINGS;
+		}
+
+		/* check that input pin 1 has a supported channels count */
+		if ((input_pin_format[1].audio_fmt.channels_count != 1) &&
+		    (input_pin_format[1].audio_fmt.channels_count != 2)) {
+			LOG_MESSAGE(CRITICAL, "Input pin1 format has unsupported channels count (%d)",
+				    LOG_ENTRY, input_pin_format[1].audio_fmt.channels_count);
+			return ADSP_INVALID_SETTINGS;
+		}
+
+		/* check that pin 1 ibs can be divided by the bytes size of "samples group" */
+		if ((input_pin_format[1].ibs * 8) % (input_pin_format[1].audio_fmt.depth * 
+						     input_pin_format[1].audio_fmt.channels_count))
+		{
+			LOG_MESSAGE(CRITICAL, "ibs1*8 shall be a multiple of samples group value: "
+				    "ibs = %d, input_bit_depth = %d.",
+				    LOG_ENTRY, input_pin_format[1].ibs,
+				    input_pin_format[1].audio_fmt.depth);
+			return ADSP_INVALID_SETTINGS;
+		}
+	}
+
+	const size_t input1_channels_count = (input_pin_format[1].ibs) ?
+		input_pin_format[1].audio_fmt.channels_count : 0;
+
+	/* Log BaseModuleCfgExt */
+	LOG_MESSAGE(VERBOSE, "Create, in_pins_format_count = %d, out_pins_format_count = %d", LOG_ENTRY, in_pins_format_count, out_pins_format_count);
+	LOG_MESSAGE(VERBOSE, "Create, input_pin_format[0]: pin_index = %d, ibs = %d", LOG_ENTRY, input_pin_format[0].pin_index, input_pin_format[0].ibs);
+	LOG_MESSAGE(VERBOSE, "Create, input_pin_format[0]: freq = %d, bit_depth = %d, channel_map = %d, channel_config = %d", LOG_ENTRY, input_pin_format[0].audio_fmt.sampling_frequency, input_pin_format[0].audio_fmt.depth, input_pin_format[0].audio_fmt.ch_map, input_pin_format[0].audio_fmt.ch_cfg);
+	LOG_MESSAGE(VERBOSE, "Create, input_pin_format[0]: interleaving_style = %d, number_of_channels = %d, audio_fmt.valid_bit_depth = %d, sample_type = %d", LOG_ENTRY, input_pin_format[0].audio_fmt.interleaving_style, input_pin_format[0].audio_fmt.channels_count, input_pin_format[0].audio_fmt.valid_bit_depth, input_pin_format[0].audio_fmt.s_type);
+	LOG_MESSAGE(VERBOSE, "Create, input_pin_format[1]: pin_index = %d, ibs = %d", LOG_ENTRY, input_pin_format[1].pin_index, input_pin_format[1].ibs);
+	LOG_MESSAGE(VERBOSE, "Create, input_pin_format[1]: freq = %d, bit_depth = %d, channel_map = %d, channel_config = %d", LOG_ENTRY, input_pin_format[1].audio_fmt.sampling_frequency, input_pin_format[1].audio_fmt.depth, input_pin_format[1].audio_fmt.ch_map, input_pin_format[1].audio_fmt.ch_cfg);
+	LOG_MESSAGE(VERBOSE, "Create, input_pin_format[1]: interleaving_style = %d, number_of_channels = %d, audio_fmt.valid_bit_depth = %d, sample_type = %d", LOG_ENTRY, input_pin_format[1].audio_fmt.interleaving_style, input_pin_format[1].audio_fmt.channels_count, input_pin_format[1].audio_fmt.valid_bit_depth, input_pin_format[1].audio_fmt.s_type);
+	LOG_MESSAGE(VERBOSE, "Create, output_pin_format: pin_index = %d, 0bs = %d", LOG_ENTRY, output_pin_format.pin_index, output_pin_format.obs);
+	LOG_MESSAGE(VERBOSE, "Create, output_pin_format: freq = %d, bit_depth = %d, channel_map = %d, channel_config = %d", LOG_ENTRY, output_pin_format.audio_fmt.sampling_frequency, output_pin_format.audio_fmt.depth, output_pin_format.audio_fmt.ch_map, output_pin_format.audio_fmt.ch_cfg);
+	LOG_MESSAGE(VERBOSE, "Create, output_pin_format: interleaving_style = %d, number_of_channels = %d, audio_fmt.valid_bit_depth = %d, sample_type = %d", LOG_ENTRY, output_pin_format.audio_fmt.interleaving_style, output_pin_format.audio_fmt.channels_count, output_pin_format.audio_fmt.valid_bit_depth, output_pin_format.audio_fmt.s_type);
+
+	mod_data->private = &self_data;
+	struct module_self_data *const self = module_get_private_data(mod);
+	self->bits_per_sample_ = output_pin_format.audio_fmt.depth;
+	self->input0_channels_count_ = input_pin_format[0].audio_fmt.channels_count;
+	self->input1_channels_count_ = input1_channels_count;
+	self->output_channels_count_ = output_pin_format.audio_fmt.channels_count;
+	self->processing_mode_ = MODULE_PROCESSING_NORMAL;
+	self->config_.divider_input_0 = self->input0_channels_count_ + self->input1_channels_count_;
+	self->config_.divider_input_1 = self->config_.divider_input_0;
+
+	return ADSP_NO_ERROR;
+}
+
+/**
+ * Module specific processing procedure
+ * This procedure is responsible to consume
+ * samples provided by the module_adapter and produce/output the processed
+ * ones back to module_adapter.
+ *
+ * there are 3 versions of the procedure, the difference is the format of
+ * input/output data
+ *
+ * the module MUST implement one and ONLY one of them
+ *
+ * process_audio_stream and process_raw_data are depreciated and will be removed
+ * once pipeline learns to use module API directly (without module adapter)
+ * modules that need such processing should use proper wrappers
+ *
+ * process
+ *	- sources are handlers to source API struct source*[]
+ *	- sinks are handlers to sink API struct sink*[]
+ */
+static int downmix_process(struct processing_module *mod, struct sof_source **sources,
+			   int num_of_sources, struct sof_sink **sinks, int num_of_sinks)
+{
+	const struct module_self_data *const self = module_get_private_data(mod);
+
+	const uint8_t *input0_pos, *input0_start;
+	const uint8_t *input1_pos, *input1_start, *input1_end;
+	uint8_t *output_pos, *output_start;
+	unsigned int input1_channels;
+	size_t input1_frame_bytes;
+	size_t frames_processed, frames_to_process;
+	int32_t divider_input_0, divider_input_1;
+	size_t i;
+	int ret;
+
+	volatile int x = 0;
+	while (x);
+
+	frames_to_process = sink_get_free_frames(sinks[0]);
+	i = source_get_data_frames_available(sources[0]);
+	if (i < frames_to_process)
+		frames_to_process = i;
+
+	const unsigned int output_channels = sink_get_channels(sinks[0]);
+	const size_t output_frame_bytes = sink_get_frame_bytes(sinks[0]);
+	ret = sink_get_buffer(sinks[0], frames_to_process * output_frame_bytes, (void**)&output_pos,
+			      (void**)&output_start, &i);
+	if (ret)
+		return ADSP_FATAL_FAILURE;
+	const uint8_t * const output_end = output_start + i;
+
+	const unsigned int input0_channels = source_get_channels(sources[0]);
+	const size_t input0_frame_bytes = source_get_frame_bytes(sources[0]);
+	ret = source_get_data(sources[0], frames_to_process * input0_frame_bytes,
+			      (const void**)&input0_pos, (const void**)&input0_start, &i);
+	if (ret) {
+		sink_commit_buffer(sinks[0], 0);
+		return ADSP_FATAL_FAILURE;
+	}
+	
+	const uint8_t * const input0_end = input0_start + i;
+
+	/* If reference pin is not connected or module is in bypass mode, set input1_channels to 0.
+	 * This allows to skip reference pin content in the processing loop */
+	if (self->input1_channels_count_ && num_of_sources > 1 &&
+	    self->processing_mode_ != MODULE_PROCESSING_NORMAL) {
+		input1_channels = source_get_channels(sources[1]);
+		input1_frame_bytes = source_get_frame_bytes(sources[1]);
+		ret = source_get_data(sources[1], frames_to_process * input1_frame_bytes,
+				      (const void**)&input1_pos,
+				      (const void**)&input1_start, &i);
+		if (ret) {
+			sink_commit_buffer(sinks[0], 0);
+			source_release_data(sources[0], 0);
+			return ADSP_FATAL_FAILURE;
+		}
+		input1_end = input1_start + i;
+
+	} else {
+		input1_channels = 0;
+		input1_frame_bytes = 0;
+	}
+
+	/* Apply processing of the input chunks and generate the output chunk */
+	divider_input_0 = self->config_.divider_input_0;
+	divider_input_1 = self->config_.divider_input_1;
+
+	if (self->processing_mode_ == MODULE_PROCESSING_BYPASS) {
+		divider_input_0 = self->input0_channels_count_;
+		/* input1_channels is already set to 0 in BYPASS mode */
+	}
+
+	frames_processed = 0;
+	while (frames_processed < frames_to_process) {
+		if (self->bits_per_sample_ == IPC4_DEPTH_16BIT) {
+			int16_t const *in0 = (int16_t const *)input0_pos;
+			int16_t const *in1 = (int16_t const *)input1_pos;
+			int16_t *out = (int16_t *)output_pos;
+
+			int32_t mixed_sample = 0;
+			for (i = 0; i < input0_channels; i++)
+				mixed_sample += (int32_t)in0[i] / divider_input_0;
+
+			for (i = 0; i < input1_channels; i++)
+				mixed_sample += (int32_t)in1[i] / divider_input_1;
+
+			for (i = 0; i < output_channels; i++)
+				out[i] = (int16_t)mixed_sample;
+		}
+
+		if (self->bits_per_sample_ == IPC4_DEPTH_32BIT) {
+			int32_t const *in0 = (int32_t const *)input0_pos;
+			int32_t const *in1 = (int32_t const *)input1_pos;
+			int32_t *out = (int32_t *)output_pos;
+
+			int64_t mixed_sample = 0;
+			for (i = 0; i < input0_channels; i++)
+				mixed_sample += (int64_t)in0[i] / divider_input_0;
+
+			for (i = 0; i < input1_channels; i++)
+				mixed_sample += (int64_t)in1[i] / divider_input_1;
+
+			for (i = 0; i < output_channels; i++)
+				out[i] = (int32_t)mixed_sample;
+		}
+
+		input0_pos += input0_frame_bytes;
+		if (input0_pos >= input0_end)
+			input0_pos = input0_start;
+
+		/* Pointer value is ignored if input1_channels == 0 */
+		input1_pos += input1_frame_bytes;
+		if (input1_pos >= input1_end)
+			input1_pos = input1_start;
+
+		output_pos += output_frame_bytes;
+		if (output_pos >= output_end)
+			output_pos = output_start;
+
+		frames_processed++;
+	}
+
+	/* commit the processed data */
+	source_release_data(sources[0], frames_to_process * input0_frame_bytes);
+	if (input1_channels)
+		source_release_data(sources[1], frames_to_process * input1_frame_bytes);
+	sink_commit_buffer(sinks[0], frames_to_process * output_frame_bytes);
+
+	return ADSP_NO_ERROR;
+}
+
+/**
+ * Set module configuration for the given configuration ID
+ *
+ * If the complete configuration message is greater than MAX_BLOB_SIZE bytes, the
+ * transmission will be split into several smaller fragments.
+ * In this case the ADSP System will perform multiple calls to SetConfiguration() until
+ * completion of the configuration message sending.
+ * \note config_id indicates ID of the configuration message only on the first fragment
+ * sending, otherwise it is set to 0.
+ */
+int downmix_set_configuration(struct processing_module *mod, uint32_t config_id,
+			      enum module_cfg_fragment_position pos, uint32_t data_offset_size,
+			      const uint8_t *fragment, size_t fragment_size, uint8_t *response,
+			      size_t response_size)
+{
+	struct module_self_data *const self = module_get_private_data(mod);
+	const struct downmixer_config *const cfg = (const struct downmixer_config *)fragment;
+
+	if (fragment_size < sizeof(*cfg))
+		return ADSP_INVALID_CONFIGURATION;
+
+	LOG_MESSAGE(LOW, "SetConfiguration: "
+		    "config_id = %d, data_offset_size = %d, fragment_size = %d",
+		    LOG_ENTRY, config_id, data_offset_size, fragment_size);
+
+	if (cfg->divider_input_0 == 0 || cfg->divider_input_1 == 0)
+		return ADSP_INVALID_CONFIGURATION;
+
+
+	self->config_.divider_input_0 = cfg->divider_input_0;
+	self->config_.divider_input_1 = cfg->divider_input_1;
+	LOG_MESSAGE(LOW, "SetConfiguration: divider_input_0 = %d, divider_input_1 = %d",
+		    LOG_ENTRY, self->config_.divider_input_0, self->config_.divider_input_1);
+	return ADSP_NO_ERROR;
+}
+
+/**
+ * Get module runtime configuration for the given configuration ID
+ *
+ * If the complete configuration message is greater than MAX_BLOB_SIZE bytes, the
+ * transmission will be split into several smaller fragments.
+ * In this case the ADSP System will perform multiple calls to GetConfiguration() until
+ * completion of the configuration message retrieval.
+ * \note config_id indicates ID of the configuration message only on the first fragment
+ * retrieval, otherwise it is set to 0.
+ */
+int downmix_get_configuration(struct processing_module *mod, uint32_t config_id,
+			      uint32_t *data_offset_size, uint8_t *fragment, size_t fragment_size)
+{
+	const struct module_self_data *const self = module_get_private_data(mod);
+	struct downmixer_config *const cfg = (struct downmixer_config *)fragment;
+
+	LOG_MESSAGE(LOW, "GetConfiguration: config_id(%d)", LOG_ENTRY, config_id);
+	cfg->divider_input_0 = self->config_.divider_input_0;
+	cfg->divider_input_1 = self->config_.divider_input_1;
+	*data_offset_size = sizeof(*cfg);
+	return ADSP_NO_ERROR;
+}
+
+/**
+ * Set processing mode for the module
+ */
+static int downmix_set_processing_mode(struct processing_module *mod, enum module_processing_mode mode)
+{
+	struct module_self_data *const self = mod->priv.private;
+
+	LOG_MESSAGE(LOW, "SetProcessingMode", LOG_ENTRY);
+
+	/* Store module mode */
+	self->processing_mode_ = mode;
+
+	return 0;
+}
+
+/**
+ * Get the current processing mode for the module
+ */
+static enum module_processing_mode downmix_get_processing_mode(struct processing_module *mod)
+{
+	struct module_self_data *const self = mod->priv.private;
+
+	LOG_MESSAGE(LOW, "GetProcessingMode", LOG_ENTRY);
+
+	return self->processing_mode_;
+}
+
+/**
+ * Module specific reset procedure, called as part of module_adapter component
+ * reset in .reset(). This should reset all parameters to their initial stage
+ * and free all memory allocated during prepare().
+ */
+static int downmix_reset(struct processing_module *mod)
+{
+	struct module_self_data *const self = mod->priv.private;
+
+	LOG_MESSAGE(LOW, "Reset", LOG_ENTRY);
+	self->processing_mode_ = MODULE_PROCESSING_NORMAL;
+
+	return 0;
+}
+
+static struct module_interface down_mixer_interface = {
+	.init  = downmix_init,
+	.process = downmix_process,
+	.set_processing_mode = downmix_set_processing_mode,
+ 	.get_processing_mode = downmix_get_processing_mode,
+	.set_configuration = downmix_set_configuration,
+	.get_configuration = downmix_get_configuration,
+	.reset = downmix_reset,
+};
+
+DECLARE_LOADABLE_MODULE_API_VERSION(downmix);
+
+static void *entry_point(void *mod_cfg, void *parent_ppl, void **mod_ptr)
+{
+	native_sys_agent = *(const struct native_system_agent **)mod_ptr;
+
+	return &down_mixer_interface;
+}
+
+__attribute__((section(".module")))
+const struct sof_man_module_manifest downmix_manifest = {
+	.module = {
+		.name = "DOWNMIX",
+		.uuid = {0x12, 0x34, 0xf1, 0xf1, 0x12, 0x34, 0x1a, 0x34,
+			 0x8c, 0x08, 0x88, 0x4b, 0xe5, 0xd1, 0x4f, 0xaa},
+		.entry_point = (uint32_t)entry_point,
+		.type = { .load_type = SOF_MAN_MOD_TYPE_MODULE,
+		.domain_ll = 1 },
+		.affinity_mask = 1,
+	}
+};
\ No newline at end of file
diff --git a/lmdk/modules/down_mixer/downmixer.h b/lmdk/modules/down_mixer/downmixer.h
new file mode 100644
index 000000000000..fd150a9b739d
--- /dev/null
+++ b/lmdk/modules/down_mixer/downmixer.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Copyright(c) 2023 Intel Corporation. All rights reserved.
+ *
+ * Author: 
+ * 
+ */
+
+#ifndef DOWNMIXER_MODULE_H_
+#define DOWNMIXER_MODULE_H_
+
+#include <stddef.h>
+
+//#include "loadable_processing_module.h"
+//#include "build/module_design_config.h"
+#include <module/interface.h>
+
+#include "downmixer_config.h"
+
+#define INPUT_NUMBER 2
+#define OUTPUT_NUMBER 1
+
+#define PROCESS_SUCCEED 0
+#define INVALID_IN_BUFFERS_SIZE 1
+
+struct module_self_data {
+	/* Indicates the bits per audio sample in the input streams and to produce in the output
+	 *stream */
+	size_t bits_per_sample_;
+
+	/* Indicates the count of channels on the input pin 0. */
+	size_t input0_channels_count_;
+
+	/* Indicates the count of channels on the input pin 1. It can be worth 0 if the input pin 1
+	 * has not been configued.
+	 * If so, any audio samples reaching the input pin 1 will be discarded. */
+	size_t input1_channels_count_;
+
+	/* Indicates the count of channels on the output pin. */
+	size_t output_channels_count_;
+
+	/* Indicates tCurrent active configuration */
+	struct downmixer_config config_;
+
+	/* current processing mode */
+	enum module_processing_mode processing_mode_;
+};
+
+
+#endif // DOWNMIXER_MODULE_H_
\ No newline at end of file
diff --git a/lmdk/modules/down_mixer/downmixer_config.h b/lmdk/modules/down_mixer/downmixer_config.h
new file mode 100644
index 000000000000..14cdff741629
--- /dev/null
+++ b/lmdk/modules/down_mixer/downmixer_config.h
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright(c) 2021 Intel Corporation. All rights reserved.
+
+
+#ifndef DOWNMIXER_CONFIG_H_
+#define DOWNMIXER_CONFIG_H_
+
+#include <stdint.h>
+
+#pragma pack(4)
+
+/*!
+ * \brief Defines the structure of the configuration message which can be sent/received
+ * to/from the Downmixer module through SetConfiguration/GetConfiguration.
+ */
+struct downmixer_config
+{
+    /*! \brief Downmixer attenuation for each input */
+    uint32_t divider_input_0;
+    uint32_t divider_input_1;
+};
+
+#pragma pack()
+
+#endif // DOWNMIXER_CONFIG_H_
diff --git a/src/include/module/iadk/adsp_error_code.h b/src/include/module/iadk/adsp_error_code.h
index e7b820e0e416..ef90b20f8c66 100644
--- a/src/include/module/iadk/adsp_error_code.h
+++ b/src/include/module/iadk/adsp_error_code.h
@@ -36,4 +36,27 @@ typedef uint32_t AdspErrorCode;
 /* Service is not supported on target platform. */
 #define ADSP_SERVICE_UNAVAILABLE 143
 
+#define ADSP_MAX_VALUE ADSP_FATAL_FAILURE
+
+/* SystemAgentInterface */
+#define ADSP_MODULE_CREATION_FAILURE (ADSP_MAX_VALUE + 1)
+
+/* ProcessingModuleFactoryInterface */
+
+/* Reports that the given value of Input Buffer Size is invalid */
+#define ADSP_INVALID_IBS	(ADSP_MAX_VALUE + 1)
+/* Reports that the given value of Output Buffer Size is invalid */
+#define ADSP_INVALID_OBS	(ADSP_MAX_VALUE + 2)
+/* Reports that the given value of Cycles Per Chunk processing is invalid */
+#define ADSP_INVALID_CPC	(ADSP_MAX_VALUE + 3)
+/* Reports that the settings provided for module creation are invalid */
+#define ADSP_INVALID_SETTINGS	(ADSP_MAX_VALUE + 4)
+
+/* ProcessingModuleInterface */
+/* Reports that the message content given for configuration is invalid */
+#define ADSP_INVALID_CONFIGURATION (ADSP_MAX_VALUE + 1)
+
+/* Reports that the module does not support retrieval of its current configuration information */
+#define ADSP_NO_CONFIGURATION (ADSP_MAX_VALUE + 2)
+
 #endif /* __MODULE_IADK_ADSP_ERROR_CODE_H__ */