diff --git a/shared/api/c_api_feature_extraction.cc b/shared/api/c_api_feature_extraction.cc
index 2d0c3ba02..5b5e6fa36 100644
--- a/shared/api/c_api_feature_extraction.cc
+++ b/shared/api/c_api_feature_extraction.cc
@@ -16,8 +16,8 @@ class RawAudiosObject : public OrtxObjectImpl {
   size_t num_audios_{};
 };
 
-extError_t ORTX_API_CALL
-OrtxCreateRawAudios(OrtxRawAudios** audios, const void* data[], const int64_t sizes[],  size_t num_audios) {
+extError_t ORTX_API_CALL OrtxCreateRawAudios(OrtxRawAudios** audios, const void* data[], const int64_t sizes[],
+                                            size_t num_audios) {
   if (audios == nullptr || data == nullptr || sizes == nullptr) {
     ReturnableStatus::last_error_message_ = "Invalid argument";
     return kOrtxErrorInvalidArgument;
@@ -25,12 +25,14 @@ OrtxCreateRawAudios(OrtxRawAudios** audios, const void* data[], const int64_t si
 
   auto audios_obj = std::make_unique<RawAudiosObject>();
   audios_obj->audios_ = std::make_unique<AudioRawData[]>(num_audios);
+  audios_obj->num_audios_ = num_audios;
   for (size_t i = 0; i < num_audios; ++i) {
     audios_obj->audios_[i].resize(sizes[i]);
     std::copy_n(static_cast<const std::byte*>(data[i]), sizes[i], audios_obj->audios_[i].data());
   }
 
-  return {};
+  *audios = static_cast<OrtxRawAudios*>(audios_obj.release());
+  return extError_t();
 }
 
 extError_t ORTX_API_CALL OrtxLoadAudios(OrtxRawAudios** raw_audios, const char* const* audio_paths, size_t num_audios) {