diff --git a/cmake/asio.cmake b/cmake/asio.cmake
index 4941b6c1..221e10b6 100644
--- a/cmake/asio.cmake
+++ b/cmake/asio.cmake
@@ -18,6 +18,7 @@ function(download_asio)
   foreach(f IN LISTS possible_file_locations)
     if(EXISTS ${f})
       set(asio_URL  "file://${f}")
+      set(asio_URL2)
       break()
     endif()
   endforeach()
diff --git a/cmake/googletest.cmake b/cmake/googletest.cmake
index 949de081..4d20c258 100644
--- a/cmake/googletest.cmake
+++ b/cmake/googletest.cmake
@@ -18,6 +18,7 @@ function(download_googltest)
   foreach(f IN LISTS possible_file_locations)
     if(EXISTS ${f})
       set(googletest_URL  "file://${f}")
+      set(googletest_URL2)
       break()
     endif()
   endforeach()
diff --git a/cmake/kaldi-native-fbank.cmake b/cmake/kaldi-native-fbank.cmake
index 6c40fce3..f70b9625 100644
--- a/cmake/kaldi-native-fbank.cmake
+++ b/cmake/kaldi-native-fbank.cmake
@@ -22,6 +22,7 @@ function(download_kaldi_native_fbank)
   foreach(f IN LISTS possible_file_locations)
     if(EXISTS ${f})
       set(kaldi_native_fbank_URL  "file://${f}")
+      set(kaldi_native_fbank_URL2 )
       break()
     endif()
   endforeach()
diff --git a/cmake/onnxruntime.cmake b/cmake/onnxruntime.cmake
index 6143adf3..056f16d9 100644
--- a/cmake/onnxruntime.cmake
+++ b/cmake/onnxruntime.cmake
@@ -78,6 +78,7 @@ function(download_onnxruntime)
   foreach(f IN LISTS possible_file_locations)
     if(EXISTS ${f})
       set(onnxruntime_URL  "file://${f}")
+      set(onnxruntime_URL2)
       break()
     endif()
   endforeach()
diff --git a/cmake/portaudio.cmake b/cmake/portaudio.cmake
index 78414f4d..01cb73a6 100644
--- a/cmake/portaudio.cmake
+++ b/cmake/portaudio.cmake
@@ -19,6 +19,7 @@ function(download_portaudio)
   foreach(f IN LISTS possible_file_locations)
     if(EXISTS ${f})
       set(portaudio_URL  "file://${f}")
+      set(portaudio_URL2)
       break()
     endif()
   endforeach()
diff --git a/cmake/pybind11.cmake b/cmake/pybind11.cmake
index b8aecdc7..b32941de 100644
--- a/cmake/pybind11.cmake
+++ b/cmake/pybind11.cmake
@@ -18,6 +18,7 @@ function(download_pybind11)
   foreach(f IN LISTS possible_file_locations)
     if(EXISTS ${f})
       set(pybind11_URL  "file://${f}")
+      set(pybind11_URL2)
       break()
     endif()
   endforeach()
diff --git a/cmake/websocketpp.cmake b/cmake/websocketpp.cmake
index 2b6c38e6..35eddc90 100644
--- a/cmake/websocketpp.cmake
+++ b/cmake/websocketpp.cmake
@@ -19,6 +19,7 @@ function(download_websocketpp)
   foreach(f IN LISTS possible_file_locations)
     if(EXISTS ${f})
       set(websocketpp_URL  "file://${f}")
+      set(websocketpp_URL2)
       break()
     endif()
   endforeach()
diff --git a/sherpa-onnx/csrc/CMakeLists.txt b/sherpa-onnx/csrc/CMakeLists.txt
index 68eeeb9e..60a56690 100644
--- a/sherpa-onnx/csrc/CMakeLists.txt
+++ b/sherpa-onnx/csrc/CMakeLists.txt
@@ -20,6 +20,7 @@ set(sources
   resample.cc
   symbol-table.cc
   text-utils.cc
+  transpose.cc
   unbind.cc
   wave-reader.cc
 )
@@ -120,6 +121,7 @@ endif()
 if(SHERPA_ONNX_ENABLE_TESTS)
   set(sherpa_onnx_test_srcs
     cat-test.cc
+    transpose-test.cc
     unbind-test.cc
   )
 
diff --git a/sherpa-onnx/csrc/transpose-test.cc b/sherpa-onnx/csrc/transpose-test.cc
new file mode 100644
index 00000000..98fd179b
--- /dev/null
+++ b/sherpa-onnx/csrc/transpose-test.cc
@@ -0,0 +1,38 @@
+// sherpa-onnx/csrc/transpose-test.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/transpose.h"
+
+#include <numeric>
+
+#include "gtest/gtest.h"
+#include "sherpa-onnx/csrc/onnx-utils.h"
+
+namespace sherpa_onnx {
+
+TEST(Tranpose, Tranpose01) {
+  Ort::AllocatorWithDefaultOptions allocator;
+  std::array<int64_t, 3> shape{3, 2, 5};
+  Ort::Value v =
+      Ort::Value::CreateTensor<float>(allocator, shape.data(), shape.size());
+  float *p = v.GetTensorMutableData<float>();
+
+  std::iota(p, p + shape[0] * shape[1] * shape[2], 0);
+
+  auto ans = Transpose01(allocator, &v);
+  auto v2 = Transpose01(allocator, &ans);
+
+  Print3D(&v);
+  Print3D(&ans);
+  Print3D(&v2);
+
+  const float *q = v2.GetTensorData<float>();
+
+  for (int32_t i = 0; i != static_cast<int32_t>(shape[0] * shape[1] * shape[2]);
+       ++i) {
+    EXPECT_EQ(p[i], q[i]);
+  }
+}
+
+}  // namespace sherpa_onnx
diff --git a/sherpa-onnx/csrc/transpose.cc b/sherpa-onnx/csrc/transpose.cc
new file mode 100644
index 00000000..09a434de
--- /dev/null
+++ b/sherpa-onnx/csrc/transpose.cc
@@ -0,0 +1,41 @@
+// sherpa-onnx/csrc/transpose.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/transpose.h"
+
+#include <assert.h>
+
+#include <algorithm>
+#include <vector>
+
+namespace sherpa_onnx {
+
+template <typename T /*=float*/>
+Ort::Value Transpose01(OrtAllocator *allocator, const Ort::Value *v) {
+  std::vector<int64_t> shape = v->GetTensorTypeAndShapeInfo().GetShape();
+  assert(shape.size() == 3);
+
+  std::array<int64_t, 3> ans_shape{shape[1], shape[0], shape[2]};
+  Ort::Value ans = Ort::Value::CreateTensor<float>(allocator, ans_shape.data(),
+                                                   ans_shape.size());
+
+  T *dst = ans.GetTensorMutableData<T>();
+  auto plane_offset = shape[1] * shape[2];
+
+  for (int64_t i = 0; i != ans_shape[0]; ++i) {
+    const T *src = v->GetTensorData<T>() + i * shape[2];
+    for (int64_t k = 0; k != ans_shape[1]; ++k) {
+      std::copy(src, src + shape[2], dst);
+      src += plane_offset;
+      dst += shape[2];
+    }
+  }
+
+  return ans;
+}
+
+template Ort::Value Transpose01<float>(OrtAllocator *allocator,
+                                       const Ort::Value *v);
+
+}  // namespace sherpa_onnx
diff --git a/sherpa-onnx/csrc/transpose.h b/sherpa-onnx/csrc/transpose.h
new file mode 100644
index 00000000..404064a3
--- /dev/null
+++ b/sherpa-onnx/csrc/transpose.h
@@ -0,0 +1,22 @@
+// sherpa-onnx/csrc/transpose.h
+//
+// Copyright (c)  2023  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_TRANSPOSE_H_
+#define SHERPA_ONNX_CSRC_TRANSPOSE_H_
+
+#include "onnxruntime_cxx_api.h"  // NOLINT
+
+namespace sherpa_onnx {
+/** Transpose a 3-D tensor from shape (B, T, C) to (T, B, C).
+ *
+ * @param allocator
+ * @param v A 3-D tensor of shape (B, T, C). Its dataype is T.
+ *
+ * @return Return a 3-D tensor of shape (T, B, C). Its datatype is T.
+ */
+template <typename T = float>
+Ort::Value Transpose01(OrtAllocator *allocator, const Ort::Value *v);
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_TRANSPOSE_H_