diff --git a/demo/ac_sound_capture1/ac_sound_capture1.cpp b/demo/ac_sound_capture1/ac_sound_capture1.cpp
index b861077..b126aac 100644
--- a/demo/ac_sound_capture1/ac_sound_capture1.cpp
+++ b/demo/ac_sound_capture1/ac_sound_capture1.cpp
@@ -152,7 +152,7 @@ void wavWriteVoice(string filename, uint32_t sample_rate, uint16_t bits_per_samp
 
 void sound_capture_callback(int32_t* voicedata, uint32_t len) {
   printf("sound_capture_callback:%d\n", len);
-  wavWriteVoice("record.wav", 48000, 32, 1, (char*)voicedata, len * sizeof(int32_t));
+  wavWriteVoice("record.wav", 96000, 32, 1, (char*)voicedata, len * sizeof(int32_t));
 }
 
 int main(int argc, char const* argv[]) {