diff --git a/projects/llm_framework/main_asr/src/main.cpp b/projects/llm_framework/main_asr/src/main.cpp
index c3bd64f..4a5f970 100644
--- a/projects/llm_framework/main_asr/src/main.cpp
+++ b/projects/llm_framework/main_asr/src/main.cpp
@@ -58,7 +58,7 @@ public:
     std::atomic_bool audio_flage_;
     std::atomic_bool awake_flage_;
     int awake_delay_       = 50;
-    int delay_audio_frame_ = 100;
+    int delay_audio_frame_ = 10;
     buffer_t *pcmdata;
 
     std::function<void(void)> pause;
@@ -183,11 +183,11 @@ public:
     {
         static int count = 0;
         if (count < delay_audio_frame_) {
-            buffer_write_char(pcmdata, raw.c_str(), raw.length());
+            buffer_write_char(pcmdata, raw.data(), raw.length());
             count++;
             return;
         }
-        buffer_write_char(pcmdata, raw.c_str(), raw.length());
+        buffer_write_char(pcmdata, raw.data(), raw.length());
         buffer_position_set(pcmdata, 0);
         count = 0;
         std::vector<float> floatSamples;
diff --git a/projects/llm_framework/main_kws/src/main.cpp b/projects/llm_framework/main_kws/src/main.cpp
index 5b8a21b..18e4dfd 100644
--- a/projects/llm_framework/main_kws/src/main.cpp
+++ b/projects/llm_framework/main_kws/src/main.cpp
@@ -59,7 +59,7 @@ public:
     bool enwake_audio_;
     std::atomic_bool audio_flage_;
     task_callback_t out_callback_;
-    int delay_audio_frame_ = 100;
+    int delay_audio_frame_ = 10;
     buffer_t *pcmdata;
     std::string wake_wav_file_;
 
@@ -233,7 +233,7 @@ public:
             count++;
             return;
         }
-        buffer_write_char(pcmdata, raw.c_str(), raw.length());
+        buffer_write_char(pcmdata, raw.data(), raw.length());
         buffer_position_set(pcmdata, 0);
         count = 0;
         std::vector<float> floatSamples;
diff --git a/projects/llm_framework/main_vad/src/main.cpp b/projects/llm_framework/main_vad/src/main.cpp
index 3bd53f3..20a67eb 100644
--- a/projects/llm_framework/main_vad/src/main.cpp
+++ b/projects/llm_framework/main_vad/src/main.cpp
@@ -60,7 +60,7 @@ public:
     std::string superior_id_;
     task_callback_t out_callback_;
     int awake_delay_       = 50;
-    int delay_audio_frame_ = 100;
+    int delay_audio_frame_ = 3;
     buffer_t *pcmdata;
     std::string wake_wav_file_;
 
@@ -158,7 +158,7 @@ public:
             count++;
             return;
         }
-        buffer_write_char(pcmdata, raw.c_str(), raw.length());
+        buffer_write_char(pcmdata, raw.data(), raw.length());
         buffer_position_set(pcmdata, 0);
         count = 0;
         std::vector<float> floatSamples;