diff --git a/Makefile b/Makefile
index bc3591442..803312d11 100644
--- a/Makefile
+++ b/Makefile
@@ -43,6 +43,7 @@ BUILD_G729=0
 BUILD_TUNNEL=0
 BUILD_WEBRTC_AECM=1
 BUILD_OPUS=1
+BUILD_WEBRTC_ISAC=1
 BUILD_FOR_X86=1
 USE_JAVAH=1
 BUILD_TLS=1
@@ -214,6 +215,7 @@ else
 prepare-silk:
 endif
 
+
 #Zrtp
 $(TOPDIR)/submodules/externals/libzrtpcpp/libzrtpcpp-config.h : $(TOPDIR)/submodules/externals/build/libzrtpcpp/libzrtpcpp-config.h
 	@cd $(TOPDIR)/submodules/externals/libzrtpcpp/ && \
@@ -295,7 +297,7 @@ prepare-sources: build-ffmpeg build-x264 prepare-ilbc build-vpx prepare-silk pre
 GENERATE_OPTIONS = NDK_DEBUG=$(NDK_DEBUG) BUILD_FOR_X86=$(BUILD_FOR_X86) \
 	BUILD_AMRNB=$(BUILD_AMRNB) BUILD_AMRWB=$(BUILD_AMRWB) BUILD_SILK=$(BUILD_SILK) BUILD_G729=$(BUILD_G729) BUILD_OPUS=$(BUILD_OPUS) \
 	BUILD_VIDEO=$(BUILD_VIDEO) BUILD_X264=$(BUILD_X264) \
-	BUILD_UPNP=$(BUILD_UPNP) BUILD_GPLV3_ZRTP=$(BUILD_GPLV3_ZRTP) BUILD_WEBRTC_AECM=$(BUILD_WEBRTC_AECM)
+	BUILD_UPNP=$(BUILD_UPNP) BUILD_GPLV3_ZRTP=$(BUILD_GPLV3_ZRTP) BUILD_WEBRTC_AECM=$(BUILD_WEBRTC_AECM) BUILD_WEBRTC_ISAC=$(BUILD_WEBRTC_ISAC)
 
 LIBLINPHONE_OPTIONS = $(GENERATE_OPTIONS) \
 	LINPHONE_VERSION=$(LINPHONE_VERSION) BELLESIP_VERSION=$(BELLESIP_VERSION) USE_JAVAH=$(USE_JAVAH) \
diff --git a/jni/Android.mk b/jni/Android.mk
index b4cc545ee..c62e7e552 100755
--- a/jni/Android.mk
+++ b/jni/Android.mk
@@ -142,14 +142,43 @@ ifneq ($(BUILD_OPUS), 0)
 include $(linphone-root-dir)/submodules/externals/build/opus/Android.mk
 endif
 
-ifneq ($(BUILD_WEBRTC_AECM), 0)
-ifneq ($(TARGET_ARCH), x86)
-ifeq ($(TARGET_ARCH_ABI), armeabi-v7a)
-WEBRTC_BUILD_NEON_LIBS=true
+WEBRTC_BUILD_NEON_LIBS=false
+
+# AECM
+ifneq ($(BUILD_WEBRTC_AECM),0)
+
+    ifneq ($(TARGET_ARCH), x86)
+
+        ifeq ($(TARGET_ARCH_ABI), armeabi-v7a)
+            $(info $(TARGET_ARCH_ABI): Build NEON modules for AECM)
+            WEBRTC_BUILD_NEON_LIBS=true
+        endif
+
+        $(info $(TARGET_ARCH_ABI): Build AECM from WebRTC)
+
+        include $(linphone-root-dir)/submodules/externals/build/webrtc/system_wrappers/Android.mk
+        include $(linphone-root-dir)/submodules/externals/build/webrtc/modules/audio_processing/utility/Android.mk
+        include $(linphone-root-dir)/submodules/externals/build/webrtc/modules/audio_processing/aecm/Android.mk
+    endif
 endif
-include $(linphone-root-dir)/submodules/externals/build/webrtc/system_wrappers/Android.mk
-include $(linphone-root-dir)/submodules/externals/build/webrtc/common_audio/signal_processing/Android.mk
-include $(linphone-root-dir)/submodules/externals/build/webrtc/modules/audio_processing/utility/Android.mk
-include $(linphone-root-dir)/submodules/externals/build/webrtc/modules/audio_processing/aecm/Android.mk
+
+# iSAC
+ifneq ($(BUILD_WEBRTC_ISAC),0)
+
+    # don't build for neon in x86
+    ifeq ($(TARGET_ARCH_ABI), armeabi-v7a)
+        $(info $(TARGET_ARCH_ABI): Build NEON modules for ISAC)
+        WEBRTC_BUILD_NEON_LIBS=true
+    endif
+
+     $(info $(TARGET_ARCH_ABI): Build proprietary iSAC plugin for mediastreamer2)
+     include $(linphone-root-dir)/submodules/externals/build/webrtc/modules/audio_coding/codecs/isac/fix/source/Android.mk
+     include $(linphone-root-dir)/submodules/msisac/Android.mk
 endif
+
+# common modules for ISAC and AECM
+ifneq ($(BUILD_WEBRTC_AECM)$(BUILD_WEBRTC_ISAC),00)
+    $(info $(TARGET_ARCH_ABI): Build common modules for iSAC and AECM ($(BUILD_WEBRTC_AECM)$(BUILD_WEBRTC_ISAC)))
+    include $(linphone-root-dir)/submodules/externals/build/webrtc/common_audio/signal_processing/Android.mk
 endif
+
diff --git a/jni/Application.mk b/jni/Application.mk
index a70c47849..36fe8b7fc 100644
--- a/jni/Application.mk
+++ b/jni/Application.mk
@@ -95,6 +95,11 @@ APP_MODULES += libwebrtc_system_wrappers libwebrtc_spl libwebrtc_apm_utility lib
 APP_MODULES += libwebrtc_spl_neon libwebrtc_aecm_neon
 endif
 
+ifeq ($(BUILD_WEBRTC_ISAC), 1)
+APP_MODULES += libwebrtc_spl libwebrtc_isacfix libmsisac
+APP_MODULES += libwebrtc_spl_neon libwebrtc_isacfix_neon
+endif
+
 ifeq ($(BUILD_MEDIASTREAMER2_SDK), 0)
 ifeq ($(RING),yes)
 APP_MODULES      += libring
diff --git a/submodules/externals/build/msisac/Android.mk b/submodules/externals/build/msisac/Android.mk
new file mode 100755
index 000000000..5e978ec38
--- /dev/null
+++ b/submodules/externals/build/msisac/Android.mk
@@ -0,0 +1,8 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := libmsisac-linphone
+LOCAL_MODULE_FILENAME := libmsisac-linphone-$(TARGET_ARCH)
+LOCAL_SRC_FILES := $(TARGET_ARCH)/libmsisac-linphone-$(TARGET_ARCH).so
+
+include $(PREBUILT_SHARED_LIBRARY)
diff --git a/submodules/externals/build/webrtc/common_audio/signal_processing/Android.mk b/submodules/externals/build/webrtc/common_audio/signal_processing/Android.mk
index 0c04ebea3..62a4583e3 100644
--- a/submodules/externals/build/webrtc/common_audio/signal_processing/Android.mk
+++ b/submodules/externals/build/webrtc/common_audio/signal_processing/Android.mk
@@ -18,14 +18,36 @@ LOCAL_MODULE_CLASS := STATIC_LIBRARIES
 LOCAL_MODULE := libwebrtc_spl
 LOCAL_MODULE_TAGS := optional
 LOCAL_SRC_FILES := \
+    auto_corr_to_refl_coef.c \
+    auto_correlation.c \
     complex_fft.c \
+    copy_set_operations.c \
     cross_correlation.c \
     division_operations.c \
+    dot_product_with_scale.c \
     downsample_fast.c \
+    energy.c \
+    filter_ar.c \
+    filter_ma_fast_q12.c \
+    get_hanning_window.c \
+    get_scaling_square.c \
+    ilbc_specific_functions.c \
+    levinson_durbin.c \
+    lpc_to_refl_coef.c \
     min_max_operations.c \
     randomization_functions.c \
     real_fft.c \
+    refl_coef_to_lpc.c \
+    resample.c \
+    resample_48khz.c \
+    resample_by_2.c \
+    resample_by_2_internal.c \
+    resample_fractional.c \
     spl_init.c \
+    spl_sqrt.c \
+    spl_version.c \
+    splitting_filter.c \
+    sqrt_of_one_minus_x_squared.c \
     vector_scaling_operations.c
 
 # Flags passed to both C and C++ files.
@@ -36,6 +58,13 @@ LOCAL_C_INCLUDES := \
     $(LOCAL_PATH)/include \
     $(LOCAL_PATH)/../.. 
 
+ifeq ($(ARCH_ARM_HAVE_ARMV7A),true)
+LOCAL_SRC_FILES += \
+    filter_ar_fast_q12_armv7.s
+else
+LOCAL_SRC_FILES += \
+    filter_ar_fast_q12.c
+endif
 ifeq ($(TARGET_ARCH),arm)
 LOCAL_SRC_FILES += \
     complex_bit_reverse_arm.s \
diff --git a/submodules/externals/build/webrtc/modules/audio_coding/codecs/isac/fix/source/Android.mk b/submodules/externals/build/webrtc/modules/audio_coding/codecs/isac/fix/source/Android.mk
new file mode 100644
index 000000000..e4d20f758
--- /dev/null
+++ b/submodules/externals/build/webrtc/modules/audio_coding/codecs/isac/fix/source/Android.mk
@@ -0,0 +1,151 @@
+# Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+#############################
+# Build the non-neon library.
+
+MY_WEBRTC_PATH := $(call my-dir)/../../../../../../
+LOCAL_PATH := $(MY_WEBRTC_PATH)/../../webrtc/modules/audio_coding/codecs/isac/fix/source
+
+include $(CLEAR_VARS)
+
+include $(MY_WEBRTC_PATH)/Android.mk
+
+LOCAL_ARM_MODE := arm
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+LOCAL_MODULE := libwebrtc_isacfix
+LOCAL_MODULE_TAGS := optional
+LOCAL_SRC_FILES := \
+    arith_routines.c \
+    arith_routines_hist.c \
+    arith_routines_logist.c \
+    bandwidth_estimator.c \
+    decode.c \
+    decode_bwe.c \
+    decode_plc.c \
+    encode.c \
+    entropy_coding.c \
+    fft.c \
+    filterbank_tables.c \
+    filterbanks.c \
+    filters.c \
+    initialize.c \
+    isacfix.c \
+    lattice.c \
+    lpc_masking_model.c \
+    lpc_tables.c \
+    pitch_estimator.c \
+    pitch_filter.c \
+    pitch_gain_tables.c \
+    pitch_lag_tables.c \
+    spectrum_ar_model_tables.c \
+    transform.c
+
+ifeq ($(ARCH_ARM_HAVE_ARMV7A),true)
+# Using .S (instead of .s) extention is to include a C header file in assembly.
+LOCAL_SRC_FILES += \
+    lattice_armv7.S \
+    pitch_filter_armv6.S
+else
+LOCAL_SRC_FILES += \
+    lattice_c.c \
+    pitch_filter_c.c
+endif
+
+# Flags passed to both C and C++ files.
+LOCAL_CFLAGS := \
+    $(MY_WEBRTC_COMMON_DEFS)
+
+LOCAL_C_INCLUDES := \
+    $(LOCAL_PATH)/../interface \
+    $(LOCAL_PATH)/../../../../../.. \
+    $(MY_WEBRTC_PATH)/../../webrtc/common_audio/signal_processing/include
+
+LOCAL_STATIC_LIBRARIES += libwebrtc_system_wrappers
+
+LOCAL_SHARED_LIBRARIES := \
+    libcutils \
+    libdl \
+    libstlport
+
+ifndef NDK_ROOT
+include external/stlport/libstlport.mk
+endif
+include $(BUILD_STATIC_LIBRARY)
+
+#########################
+# Build the neon library.
+ifeq ($(WEBRTC_BUILD_NEON_LIBS),true)
+
+include $(CLEAR_VARS)
+
+LOCAL_ARM_MODE := arm
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+LOCAL_MODULE := libwebrtc_isacfix_neon
+LOCAL_MODULE_TAGS := optional
+LOCAL_SRC_FILES := \
+    filters_neon.c \
+    lattice_neon.S \
+    lpc_masking_model_neon.S
+
+# Flags passed to both C and C++ files.
+LOCAL_CFLAGS := \
+    $(MY_WEBRTC_COMMON_DEFS) \
+    -mfpu=neon \
+    -mfloat-abi=softfp \
+    -flax-vector-conversions
+
+LOCAL_C_INCLUDES := \
+    $(LOCAL_PATH)/../interface \
+    $(LOCAL_PATH)/../../../../../.. \
+    $(MY_WEBRTC_PATH)/../../webrtc/common_audio/signal_processing/include
+
+
+ifndef NDK_ROOT
+include external/stlport/libstlport.mk
+endif
+include $(BUILD_STATIC_LIBRARY)
+
+endif # ifeq ($(WEBRTC_BUILD_NEON_LIBS),true)
+
+###########################
+# isac test app
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := tests
+LOCAL_CPP_EXTENSION := .cc
+LOCAL_SRC_FILES:= ../test/kenny.c
+
+# Flags passed to both C and C++ files.
+LOCAL_CFLAGS := $(MY_WEBRTC_COMMON_DEFS)
+
+LOCAL_C_INCLUDES := \
+    $(LOCAL_PATH)/../interface \
+    $(LOCAL_PATH)/../../../../../..
+
+LOCAL_STATIC_LIBRARIES := \
+    libwebrtc_isacfix \
+    libwebrtc_spl \
+    libwebrtc_system_wrappers
+
+ifeq ($(WEBRTC_BUILD_NEON_LIBS),true)
+LOCAL_STATIC_LIBRARIES += \
+    libwebrtc_isacfix_neon
+endif
+
+LOCAL_SHARED_LIBRARIES := \
+    libutils
+
+LOCAL_MODULE:= webrtc_isac_test
+
+ifdef NDK_ROOT
+include $(BUILD_EXECUTABLE)
+else
+include $(BUILD_NATIVE_TEST)
+endif