diff --git a/src/audio.cpp b/src/audio.cpp
index c953202..0925198 100644
--- a/src/audio.cpp
+++ b/src/audio.cpp
@@ -105,20 +105,23 @@ void audio_loop() {
         pkt[0] = REPORT_ID;
         pkt[1] = reportSeqCounter << 4;
         reportSeqCounter = (reportSeqCounter + 1) & 0x0F;
-        pkt[2] = 0x11 | (1 << 7);
+        pkt[2] = 0x11 | 0 << 6 | 1 << 7;
         pkt[3] = 7;
         pkt[4] = 0b11111110;
-        const auto buf_len = get_config().haptics_buffer_length;
+        const auto buf_len = get_config().audio_buffer_length;
         pkt[5] = buf_len;
         pkt[6] = buf_len;
         pkt[7] = buf_len;
-        pkt[8] = buf_len;
-        pkt[9] = buf_len; // buffer length
+        pkt[8] = buf_len; // 这 4 个字节的作用未知，调整没有效果
+        pkt[9] = buf_len; // audio buffer length 只有调整这个字节生效。
         pkt[10] = packetCounter++;
-        pkt[11] = 0x12 | (1 << 7);
+        pkt[11] = 0x12 | 0 << 6 | 1 << 7;
         pkt[12] = SAMPLE_SIZE;
         memcpy(pkt + 13, haptic_buf, SAMPLE_SIZE);
         pkt[77] = (plug_headset ? 0x16 : 0x13) | 0 << 6 | 1 << 7; // Speaker: 0x13
+        // L Headset Mono: 0x14
+        // L Headset R Speaker: 0x15
+        // Headset: 0x16
         pkt[78] = 200;
         critical_section_enter_blocking(&opus_cs);
         memcpy(pkt + 79, opus_buf, 200);
diff --git a/src/config.cpp b/src/config.cpp
index d81d9ca..3c1b46b 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -71,8 +71,8 @@ void config_valid() {
         body->polling_rate_mode = 0;
         printf("[Config] polling_rate_mode is invalid\n");
     }
-    if (body->haptics_buffer_length < 16 || body->haptics_buffer_length > 128) {
-        body->haptics_buffer_length = 64;
+    if (body->audio_buffer_length < 16 || body->audio_buffer_length > 128) {
+        body->audio_buffer_length = 64;
         printf("[Config] haptics_buffer_length is invalid\n");
     }
     if (body->controller_mode > 2) {
diff --git a/src/config.h b/src/config.h
index 5d73272..69c8a6b 100644
--- a/src/config.h
+++ b/src/config.h
@@ -14,7 +14,7 @@ struct __attribute__((packed)) Config_body {
     uint8_t disable_inactive_disconnect; // bool: 0 disable,1 enable
     uint8_t disable_pico_led; // bool
     uint8_t polling_rate_mode; // 0: 250Hz, 1: 500Hz, 2: real-time
-    uint8_t haptics_buffer_length; // [16,128]
+    uint8_t audio_buffer_length; // [16,128]
     uint8_t controller_mode; // 0: DS5, 1: DSE, 2: Auto
 };