diff --git a/.github/scripts/test-offline-ctc.sh b/.github/scripts/test-offline-ctc.sh
index 16f7889df..a6d16d97d 100755
--- a/.github/scripts/test-offline-ctc.sh
+++ b/.github/scripts/test-offline-ctc.sh
@@ -19,10 +19,10 @@ log "------------------------------------------------------------"
 wenet_models=(
 sherpa-onnx-zh-wenet-aishell
 sherpa-onnx-zh-wenet-aishell2
-sherpa-onnx-zh-wenet-wenetspeech
+# sherpa-onnx-zh-wenet-wenetspeech
 sherpa-onnx-zh-wenet-multi-cn
 sherpa-onnx-en-wenet-librispeech
-sherpa-onnx-en-wenet-gigaspeech
+# sherpa-onnx-en-wenet-gigaspeech
 )
 for name in ${wenet_models[@]}; do
   repo_url=https://huggingface.co/csukuangfj/$name
diff --git a/.github/workflows/arm-linux-gnueabihf.yaml b/.github/workflows/arm-linux-gnueabihf.yaml
index cb342935a..541fc3e57 100644
--- a/.github/workflows/arm-linux-gnueabihf.yaml
+++ b/.github/workflows/arm-linux-gnueabihf.yaml
@@ -168,6 +168,9 @@ jobs:
           lib_type=${{ matrix.lib_type }}
           if [[ $lib_type == "shared" ]]; then
             cp -a build-arm-linux-gnueabihf/install/lib $dst/
+            rm -v $dst/lib/libasound.so
+            rm -v $dst/lib/libonnxruntime.so
+            rm -v $dst/lib/libsherpa-onnx-fst.so
           fi
 
           tree $dst
diff --git a/.github/workflows/test-piper-phonemize.yaml b/.github/workflows/test-piper-phonemize.yaml
new file mode 100644
index 000000000..ab1c39387
--- /dev/null
+++ b/.github/workflows/test-piper-phonemize.yaml
@@ -0,0 +1,82 @@
+name: test-piper-phonemize
+on:
+  push:
+    branches:
+      - master
+
+  workflow_dispatch:
+
+concurrency:
+  group: test-piper-phonemize-${{ github.ref }}
+  cancel-in-progress: true
+
+
+jobs:
+  test_piper_phonemize:
+    name: ${{ matrix.os }} ${{ matrix.build_type }} ${{ matrix.shared_lib }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        build_type: [Release, Debug]
+        shared_lib: [ON, OFF]
+        exclude:
+          - os: windows-latest
+            build_type: Debug
+            shared_lib: OFF
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ${{ matrix.os }}-${{ matrix.build_type }}-shared-${{ matrix.shared_lib }}
+
+      - name: Configure CMake
+        shell: bash
+        run: |
+          export CMAKE_CXX_COMPILER_LAUNCHER=ccache
+          export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
+          cmake --version
+
+          mkdir build
+          cd build
+          cmake -DCMAKE_VERBOSE_MAKEFILE=ON -D SHERPA_ONNX_ENABLE_TESTS=ON -D CMAKE_BUILD_TYPE=${{ matrix.build_type }} -D BUILD_SHARED_LIBS=${{ matrix.shared_lib }} -DCMAKE_INSTALL_PREFIX=./install ..
+
+      - name: Build
+        shell: bash
+        run: |
+          export CMAKE_CXX_COMPILER_LAUNCHER=ccache
+          export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
+          cmake --version
+
+          cd build
+          cmake --build . --target install --config ${{ matrix.build_type }}
+
+      - name: run test
+        if: matrix.os != 'windows-latest'
+        shell: bash
+        run: |
+          cd build
+
+          ls -lh install/
+          ls -lh install/share
+          ls -lh install/share/espeak-ng-data/
+
+          ./bin/piper-phonemize-test
+
+      - name: run test
+        if: matrix.os == 'windows-latest'
+        shell: bash
+        run: |
+          cd build
+
+          ls -lh install/
+          ls -lh install/share
+          ls -lh install/share/espeak-ng-data/
+
+          ./bin/${{ matrix.build_type }}/piper-phonemize-test
diff --git a/CMakeLists.txt b/CMakeLists.txt
index eba77a2d8..27b3d2c0d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -159,6 +159,8 @@ endif()
 include(kaldi-native-fbank)
 include(kaldi-decoder)
 include(onnxruntime)
+set(ONNXRUNTIME_DIR ${onnxruntime_SOURCE_DIR})
+message(STATUS "ONNXRUNTIME_DIR: ${ONNXRUNTIME_DIR}")
 
 if(SHERPA_ONNX_ENABLE_PORTAUDIO)
   include(portaudio)
@@ -178,6 +180,11 @@ if(SHERPA_ONNX_ENABLE_WEBSOCKET)
   include(asio)
 endif()
 
+include(espeak-ng-for-piper)
+set(ESPEAK_NG_DIR ${espeak_ng_SOURCE_DIR})
+message(STATUS "ESPEAK_NG_DIR: ${ESPEAK_NG_DIR}")
+include(piper-phonemize)
+
 add_subdirectory(sherpa-onnx)
 
 if(SHERPA_ONNX_ENABLE_C_API)
diff --git a/build-aarch64-linux-gnu.sh b/build-aarch64-linux-gnu.sh
index 469812384..164182c79 100755
--- a/build-aarch64-linux-gnu.sh
+++ b/build-aarch64-linux-gnu.sh
@@ -45,6 +45,10 @@ if [[ x"$BUILD_SHARED_LIBS" == x"" ]]; then
 fi
 
 cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
   -DCMAKE_INSTALL_PREFIX=./install \
   -DCMAKE_BUILD_TYPE=Release \
   -DBUILD_SHARED_LIBS=$BUILD_SHARED_LIBS \
diff --git a/build-android-arm64-v8a.sh b/build-android-arm64-v8a.sh
index 5e46aa5a6..8297561f7 100755
--- a/build-android-arm64-v8a.sh
+++ b/build-android-arm64-v8a.sh
@@ -72,6 +72,10 @@ echo "SHERPA_ONNXRUNTIME_LIB_DIR: $SHERPA_ONNXRUNTIME_LIB_DIR"
 echo "SHERPA_ONNXRUNTIME_INCLUDE_DIR $SHERPA_ONNXRUNTIME_INCLUDE_DIR"
 
 cmake -DCMAKE_TOOLCHAIN_FILE="$ANDROID_NDK/build/cmake/android.toolchain.cmake" \
+    -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+    -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+    -DBUILD_ESPEAK_NG_EXE=OFF \
+    -DBUILD_ESPEAK_NG_TESTS=OFF \
     -DCMAKE_BUILD_TYPE=Release \
     -DBUILD_SHARED_LIBS=ON \
     -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
diff --git a/build-android-armv7-eabi.sh b/build-android-armv7-eabi.sh
index 14a07bad5..9157f4cdb 100755
--- a/build-android-armv7-eabi.sh
+++ b/build-android-armv7-eabi.sh
@@ -73,6 +73,10 @@ echo "SHERPA_ONNXRUNTIME_LIB_DIR: $SHERPA_ONNXRUNTIME_LIB_DIR"
 echo "SHERPA_ONNXRUNTIME_INCLUDE_DIR $SHERPA_ONNXRUNTIME_INCLUDE_DIR"
 
 cmake -DCMAKE_TOOLCHAIN_FILE="$ANDROID_NDK/build/cmake/android.toolchain.cmake" \
+    -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+    -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+    -DBUILD_ESPEAK_NG_EXE=OFF \
+    -DBUILD_ESPEAK_NG_TESTS=OFF \
     -DCMAKE_BUILD_TYPE=Release \
     -DBUILD_SHARED_LIBS=ON \
     -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
diff --git a/build-android-x86-64.sh b/build-android-x86-64.sh
index d4196a1ca..02a7b9590 100755
--- a/build-android-x86-64.sh
+++ b/build-android-x86-64.sh
@@ -73,6 +73,10 @@ echo "SHERPA_ONNXRUNTIME_LIB_DIR: $SHERPA_ONNXRUNTIME_LIB_DIR"
 echo "SHERPA_ONNXRUNTIME_INCLUDE_DIR $SHERPA_ONNXRUNTIME_INCLUDE_DIR"
 
 cmake -DCMAKE_TOOLCHAIN_FILE="$ANDROID_NDK/build/cmake/android.toolchain.cmake" \
+    -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+    -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+    -DBUILD_ESPEAK_NG_EXE=OFF \
+    -DBUILD_ESPEAK_NG_TESTS=OFF \
     -DCMAKE_BUILD_TYPE=Release \
     -DBUILD_SHARED_LIBS=ON \
     -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
diff --git a/build-android-x86.sh b/build-android-x86.sh
index 2eb6fecc4..1b6194f37 100755
--- a/build-android-x86.sh
+++ b/build-android-x86.sh
@@ -73,6 +73,10 @@ echo "SHERPA_ONNXRUNTIME_LIB_DIR: $SHERPA_ONNXRUNTIME_LIB_DIR"
 echo "SHERPA_ONNXRUNTIME_INCLUDE_DIR $SHERPA_ONNXRUNTIME_INCLUDE_DIR"
 
 cmake -DCMAKE_TOOLCHAIN_FILE="$ANDROID_NDK/build/cmake/android.toolchain.cmake" \
+    -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+    -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+    -DBUILD_ESPEAK_NG_EXE=OFF \
+    -DBUILD_ESPEAK_NG_TESTS=OFF \
     -DCMAKE_BUILD_TYPE=Release \
     -DBUILD_SHARED_LIBS=ON \
     -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
diff --git a/build-arm-linux-gnueabihf.sh b/build-arm-linux-gnueabihf.sh
index 90b6e7c18..06db39cb0 100755
--- a/build-arm-linux-gnueabihf.sh
+++ b/build-arm-linux-gnueabihf.sh
@@ -40,6 +40,10 @@ if [[ x"$BUILD_SHARED_LIBS" == x"" ]]; then
 fi
 
 cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
   -DCMAKE_INSTALL_PREFIX=./install \
   -DCMAKE_BUILD_TYPE=Release \
   -DBUILD_SHARED_LIBS=$BUILD_SHARED_LIBS \
diff --git a/build-ios.sh b/build-ios.sh
index 447d7fbb6..5f82c40b5 100755
--- a/build-ios.sh
+++ b/build-ios.sh
@@ -51,6 +51,10 @@ echo "SHERPA_ONNXRUNTIME_INCLUDE_DIR $SHERPA_ONNXRUNTIME_INCLUDE_DIR"
 #
 
 cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
   -S .. \
   -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
   -DPLATFORM=SIMULATOR64 \
@@ -74,6 +78,10 @@ cmake --build build/simulator_x86_64 -j 4 --verbose
 echo "Building for simulator (arm64)"
 
 cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
   -S .. \
   -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
   -DPLATFORM=SIMULATORARM64 \
@@ -101,6 +109,10 @@ export SHERPA_ONNXRUNTIME_LIB_DIR=$PWD/ios-onnxruntime/onnxruntime.xcframework/i
 
 
 cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
   -S .. \
   -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
   -DPLATFORM=OS64 \
diff --git a/cmake/espeak-ng-for-piper.cmake b/cmake/espeak-ng-for-piper.cmake
new file mode 100644
index 000000000..e1dfb2fc0
--- /dev/null
+++ b/cmake/espeak-ng-for-piper.cmake
@@ -0,0 +1,127 @@
+function(download_espeak_ng_for_piper)
+  include(FetchContent)
+
+  set(espeak_ng_URL  "https://github.com/csukuangfj/espeak-ng/archive/c58d2a4a88e9a291ca448f046e15c6188cbd3b3a.zip")
+  set(espeak_ng_URL2 "")
+  set(espeak_ng_HASH "SHA256=8a48251e6926133dd91fcf6cb210c7c2e290a9b578d269446e2d32d710b0dfa0")
+
+  set(USE_ASYNC OFF CACHE BOOL "" FORCE)
+  set(USE_MBROLA OFF CACHE BOOL "" FORCE)
+  set(USE_LIBSONIC OFF CACHE BOOL "" FORCE)
+  set(USE_LIBPCAUDIO OFF CACHE BOOL "" FORCE)
+  set(USE_KLATT OFF CACHE BOOL "" FORCE)
+  set(USE_SPEECHPLAYER OFF CACHE BOOL "" FORCE)
+  set(EXTRA_cmn ON CACHE BOOL "" FORCE)
+  set(EXTRA_ru ON CACHE BOOL "" FORCE)
+
+  # If you don't have access to the Internet,
+  # please pre-download kaldi-decoder
+  set(possible_file_locations
+    $ENV{HOME}/Downloads/espeak-ng-c58d2a4a88e9a291ca448f046e15c6188cbd3b3a.zip
+    ${PROJECT_SOURCE_DIR}/espeak-ng-c58d2a4a88e9a291ca448f046e15c6188cbd3b3a.zip
+    ${PROJECT_BINARY_DIR}/espeak-ng-c58d2a4a88e9a291ca448f046e15c6188cbd3b3a.zip
+    /tmp/espeak-ng-c58d2a4a88e9a291ca448f046e15c6188cbd3b3a.zip
+    /star-fj/fangjun/download/github/espeak-ng-c58d2a4a88e9a291ca448f046e15c6188cbd3b3a.zip
+  )
+
+  foreach(f IN LISTS possible_file_locations)
+    if(EXISTS ${f})
+      set(espeak_ng_URL  "${f}")
+      file(TO_CMAKE_PATH "${espeak_ng_URL}" espeak_ng_URL)
+      message(STATUS "Found local downloaded espeak-ng: ${espeak_ng_URL}")
+      set(espeak_ng_URL2 )
+      break()
+    endif()
+  endforeach()
+
+  FetchContent_Declare(espeak_ng
+    URL
+      ${espeak_ng_URL}
+      ${espeak_ng_URL2}
+    URL_HASH          ${espeak_ng_HASH}
+  )
+
+  FetchContent_GetProperties(espeak_ng)
+  if(NOT espeak_ng_POPULATED)
+    message(STATUS "Downloading espeak-ng from ${espeak_ng_URL}")
+    FetchContent_Populate(espeak_ng)
+  endif()
+  message(STATUS "espeak-ng is downloaded to ${espeak_ng_SOURCE_DIR}")
+  message(STATUS "espeak-ng binary dir is ${espeak_ng_BINARY_DIR}")
+
+  add_subdirectory(${espeak_ng_SOURCE_DIR} ${espeak_ng_BINARY_DIR})
+  set(espeak_ng_SOURCE_DIR ${espeak_ng_SOURCE_DIR} PARENT_SCOPE)
+
+  if(WIN32 AND MSVC)
+    target_compile_options(ucd PUBLIC
+      /wd4309
+    )
+
+    target_compile_options(espeak-ng PUBLIC
+      /wd4005
+      /wd4018
+      /wd4067
+      /wd4068
+      /wd4090
+      /wd4101
+      /wd4244
+      /wd4267
+      /wd4996
+    )
+
+    if(TARGET espeak-ng-bin)
+      target_compile_options(espeak-ng-bin PRIVATE
+        /wd4244
+        /wd4024
+        /wd4047
+        /wd4067
+        /wd4267
+        /wd4996
+      )
+    endif()
+  endif()
+
+  if(UNIX AND NOT APPLE)
+    target_compile_options(espeak-ng PRIVATE
+      -Wno-unused-result
+      -Wno-format-overflow
+      -Wno-format-truncation
+      -Wno-maybe-uninitialized
+      -Wno-format
+    )
+
+    if(TARGET espeak-ng-bin)
+      target_compile_options(espeak-ng-bin PRIVATE
+        -Wno-unused-result
+      )
+    endif()
+  endif()
+
+  target_include_directories(espeak-ng
+    INTERFACE
+      ${espeak_ng_SOURCE_DIR}/src/include
+      ${espeak_ng_SOURCE_DIR}/src/ucd-tools/src/include
+  )
+
+  if(SHERPA_ONNX_ENABLE_PYTHON AND WIN32)
+    install(TARGETS
+      espeak-ng
+    DESTINATION ..)
+  else()
+    install(TARGETS
+      espeak-ng
+    DESTINATION lib)
+  endif()
+
+  if(NOT BUILD_SHARED_LIBS)
+    install(TARGETS ucd DESTINATION lib)
+  endif()
+
+  if(WIN32 AND BUILD_SHARED_LIBS)
+    install(TARGETS
+      espeak-ng
+    DESTINATION bin)
+  endif()
+endfunction()
+
+download_espeak_ng_for_piper()
diff --git a/cmake/kaldi-decoder.cmake b/cmake/kaldi-decoder.cmake
index 9f85d70a7..25084febf 100644
--- a/cmake/kaldi-decoder.cmake
+++ b/cmake/kaldi-decoder.cmake
@@ -47,6 +47,13 @@ function(download_kaldi_decoder)
   include_directories(${kaldi_decoder_SOURCE_DIR})
   add_subdirectory(${kaldi_decoder_SOURCE_DIR} ${kaldi_decoder_BINARY_DIR} EXCLUDE_FROM_ALL)
 
+  if(WIN32 AND MSVC)
+    target_compile_options(kaldi-decoder-core PUBLIC
+      /wd4018
+      /wd4291
+    )
+  endif()
+
   target_include_directories(kaldi-decoder-core
     INTERFACE
       ${kaldi-decoder_SOURCE_DIR}/
diff --git a/cmake/onnxruntime.cmake b/cmake/onnxruntime.cmake
index 28f18540f..5775df9e6 100644
--- a/cmake/onnxruntime.cmake
+++ b/cmake/onnxruntime.cmake
@@ -94,6 +94,7 @@ function(download_onnxruntime)
     message(STATUS "CMAKE_SYSTEM_PROCESSOR: ${CMAKE_SYSTEM_PROCESSOR}")
     message(FATAL_ERROR "Only support Linux, macOS, and Windows at present. Will support other OSes later")
   endif()
+  set(onnxruntime_SOURCE_DIR ${onnxruntime_SOURCE_DIR} PARENT_SCOPE)
 endfunction()
 
 # First, we try to locate the header and the lib if the use has already
diff --git a/cmake/piper-phonemize.cmake b/cmake/piper-phonemize.cmake
new file mode 100644
index 000000000..13b6bca6e
--- /dev/null
+++ b/cmake/piper-phonemize.cmake
@@ -0,0 +1,73 @@
+function(download_piper_phonemize)
+  include(FetchContent)
+
+  set(piper_phonemize_URL  "https://github.com/csukuangfj/piper-phonemize/archive/6383e46b62e94c5cafc0c6a6212249ed8b9ed8d0.zip")
+  set(piper_phonemize_URL2 "")
+  set(piper_phonemize_HASH "SHA256=6fbacf540b03f00d1386bb372fb7090e3bb852bd019d74e615d3f161f728bc93")
+
+  # If you don't have access to the Internet,
+  # please pre-download kaldi-decoder
+  set(possible_file_locations
+    $ENV{HOME}/Downloads/piper-phonemize-6383e46b62e94c5cafc0c6a6212249ed8b9ed8d0.zip
+    ${PROJECT_SOURCE_DIR}/piper-phonemize-6383e46b62e94c5cafc0c6a6212249ed8b9ed8d0.zip
+    ${PROJECT_BINARY_DIR}/piper-phonemize-6383e46b62e94c5cafc0c6a6212249ed8b9ed8d0.zip
+    /tmp/piper-phonemize-6383e46b62e94c5cafc0c6a6212249ed8b9ed8d0.zip
+    /star-fj/fangjun/download/github/piper-phonemize-6383e46b62e94c5cafc0c6a6212249ed8b9ed8d0.zip
+  )
+
+  foreach(f IN LISTS possible_file_locations)
+    if(EXISTS ${f})
+      set(piper_phonemize_URL  "${f}")
+      file(TO_CMAKE_PATH "${piper_phonemize_URL}" piper_phonemize_URL)
+      message(STATUS "Found local downloaded espeak-ng: ${piper_phonemize_URL}")
+      set(piper_phonemize_URL2 )
+      break()
+    endif()
+  endforeach()
+
+  FetchContent_Declare(piper_phonemize
+    URL
+      ${piper_phonemize_URL}
+      ${piper_phonemize_URL2}
+    URL_HASH          ${piper_phonemize_HASH}
+  )
+
+  FetchContent_GetProperties(piper_phonemize)
+  if(NOT piper_phonemize_POPULATED)
+    message(STATUS "Downloading piper-phonemize from ${piper_phonemize_URL}")
+    FetchContent_Populate(piper_phonemize)
+  endif()
+  message(STATUS "piper-phonemize is downloaded to ${piper_phonemize_SOURCE_DIR}")
+  message(STATUS "piper-phonemize binary dir is ${piper_phonemize_BINARY_DIR}")
+
+  add_subdirectory(${piper_phonemize_SOURCE_DIR} ${piper_phonemize_BINARY_DIR} EXCLUDE_FROM_ALL)
+
+  if(WIN32 AND MSVC)
+    target_compile_options(piper_phonemize PUBLIC
+      /wd4309
+    )
+  endif()
+
+  target_include_directories(piper_phonemize
+    INTERFACE
+      ${piper_phonemize_SOURCE_DIR}/src/include
+  )
+
+  if(SHERPA_ONNX_ENABLE_PYTHON AND WIN32)
+    install(TARGETS
+      piper_phonemize
+    DESTINATION ..)
+  else()
+    install(TARGETS
+      piper_phonemize
+    DESTINATION lib)
+  endif()
+
+  if(WIN32 AND BUILD_SHARED_LIBS)
+    install(TARGETS
+      piper_phonemize
+    DESTINATION bin)
+  endif()
+endfunction()
+
+download_piper_phonemize()
diff --git a/sherpa-onnx/csrc/CMakeLists.txt b/sherpa-onnx/csrc/CMakeLists.txt
index 403931028..02ec56c0b 100644
--- a/sherpa-onnx/csrc/CMakeLists.txt
+++ b/sherpa-onnx/csrc/CMakeLists.txt
@@ -106,6 +106,11 @@ if(SHERPA_ONNX_ENABLE_CHECK)
   list(APPEND sources log.cc)
 endif()
 add_library(sherpa-onnx-core ${sources})
+if(APPLE)
+  target_compile_options(sherpa-onnx-core PRIVATE
+    -Wno-deprecated-declarations
+  )
+endif()
 
 if(NOT WIN32)
   target_link_libraries(sherpa-onnx-core -pthread)
@@ -136,6 +141,8 @@ if(SHERPA_ONNX_ENABLE_GPU)
   )
 endif()
 
+target_link_libraries(sherpa-onnx-core piper_phonemize)
+
 if(SHERPA_ONNX_ENABLE_CHECK)
   target_compile_definitions(sherpa-onnx-core PUBLIC SHERPA_ONNX_ENABLE_CHECK=1)
 
@@ -343,6 +350,7 @@ if(SHERPA_ONNX_ENABLE_TESTS)
     context-graph-test.cc
     packed-sequence-test.cc
     pad-sequence-test.cc
+    piper-phonemize-test.cc
     slice-test.cc
     stack-test.cc
     transpose-test.cc
diff --git a/sherpa-onnx/csrc/piper-phonemize-test.cc b/sherpa-onnx/csrc/piper-phonemize-test.cc
new file mode 100644
index 000000000..b1d0790a6
--- /dev/null
+++ b/sherpa-onnx/csrc/piper-phonemize-test.cc
@@ -0,0 +1,78 @@
+// sherpa-onnx/csrc/piper-phonemize-test.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "espeak-ng/speak_lib.h"
+#include "gtest/gtest.h"
+#include "phoneme_ids.hpp"
+#include "phonemize.hpp"
+#include "sherpa-onnx/csrc/file-utils.h"
+#include "sherpa-onnx/csrc/macros.h"
+
+namespace sherpa_onnx {
+
+TEST(PiperPhonemize, Case1) {
+  std::string data_dir = "./install/share/espeak-ng-data";
+  if (!FileExists(data_dir + "/en_dict")) {
+    SHERPA_ONNX_LOGE("%s/en_dict does not exist. Skipping test",
+                     data_dir.c_str());
+    return;
+  }
+
+  if (!FileExists(data_dir + "/phontab")) {
+    SHERPA_ONNX_LOGE("%s/phontab does not exist. Skipping test",
+                     data_dir.c_str());
+    return;
+  }
+
+  if (!FileExists(data_dir + "/phonindex")) {
+    SHERPA_ONNX_LOGE("%s/phonindex does not exist. Skipping test",
+                     data_dir.c_str());
+    return;
+  }
+
+  if (!FileExists(data_dir + "/phondata")) {
+    SHERPA_ONNX_LOGE("%s/phondata does not exist. Skipping test",
+                     data_dir.c_str());
+    return;
+  }
+
+  if (!FileExists(data_dir + "/intonations")) {
+    SHERPA_ONNX_LOGE("%s/intonations does not exist. Skipping test",
+                     data_dir.c_str());
+    return;
+  }
+  int32_t result =
+      espeak_Initialize(AUDIO_OUTPUT_SYNCHRONOUS, 0, data_dir.c_str(), 0);
+  EXPECT_EQ(result, 22050);
+
+  piper::eSpeakPhonemeConfig config;
+
+  // ./bin/espeak-ng --path  ./install/share/espeak-ng-data/ --voices
+  // to list available voices
+  config.voice = "en-us";
+
+  std::vector<std::vector<piper::Phoneme>> phonemes;
+  std::string text = "how are you doing?";
+  piper::phonemize_eSpeak(text, config, phonemes);
+
+  for (int32_t p : phonemes[0]) {
+    std::cout << p << " ";
+  }
+  std::cout << "\n";
+
+  std::vector<piper::PhonemeId> phonemeIds;
+  std::map<piper::Phoneme, std::size_t> missingPhonemes;
+
+  {
+    piper::PhonemeIdConfig config;
+    phonemes_to_ids(phonemes[0], config, phonemeIds, missingPhonemes);
+  }
+
+  for (int32_t p : phonemeIds) {
+    std::cout << p << " ";
+  }
+  std::cout << "\n";
+}
+
+}  // namespace sherpa_onnx