diff --git a/sw_usb_audio/app_usb_aud_fosi_c1/gen_factory.bat b/sw_usb_audio/app_usb_aud_fosi_c1/gen_factory.bat
index 171a80f..b76846e 100644
--- a/sw_usb_audio/app_usb_aud_fosi_c1/gen_factory.bat
+++ b/sw_usb_audio/app_usb_aud_fosi_c1/gen_factory.bat
@@ -1 +1 @@
-xflash bin/factory/phaten_module_factory.xe --loader loader.o --upgrade 6 bin/fps_uac1/phaten_module_fps_uac1.xe  --upgrade 2 ../app_usb_aud_fosi_c1_lp/bin/bypass_uac1/phaten_module_bypass_uac1.xe  -o %1
+xflash bin/factory/phaten_module_factory.xe --loader loader.o --upgrade 2 bin/fps_uac1/phaten_module_fps_uac1.xe  --upgrade 6 ../app_usb_aud_fosi_c1_lp/bin/bypass_uac1/phaten_module_bypass_uac1.xe  -o %1
diff --git a/sw_usb_audio/app_usb_aud_fosi_c1/gen_update.bat b/sw_usb_audio/app_usb_aud_fosi_c1/gen_update.bat
index e187bc8..b644bc9 100644
--- a/sw_usb_audio/app_usb_aud_fosi_c1/gen_update.bat
+++ b/sw_usb_audio/app_usb_aud_fosi_c1/gen_update.bat
@@ -1 +1 @@
-xflash --factory-version 15.3 --target-file src/core/xu316_qf60.xn --upgrade 6 bin/fps_uac1/phaten_module_fps_uac1.xe --upgrade 2 ../app_usb_aud_fosi_c1_lp/bin/bypass_uac1/phaten_module_bypass_uac1.xe -o %1
+xflash --factory-version 15.3 --target-file src/core/xu316_qf60.xn --upgrade 2 bin/fps_uac1/phaten_module_fps_uac1.xe --upgrade 6 ../app_usb_aud_fosi_c1_lp/bin/bypass_uac1/phaten_module_bypass_uac1.xe -o %1
diff --git a/sw_usb_audio/app_usb_aud_fosi_c1/src/extensions/audiohw.xc b/sw_usb_audio/app_usb_aud_fosi_c1/src/extensions/audiohw.xc
index e9238c6..ad782ba 100644
--- a/sw_usb_audio/app_usb_aud_fosi_c1/src/extensions/audiohw.xc
+++ b/sw_usb_audio/app_usb_aud_fosi_c1/src/extensions/audiohw.xc
@@ -34,11 +34,11 @@ extern "C" {
 #define DISABLE_REBOOT 1
 
 #define MODE_FPS_UAC2           COAX_IN_FLAG   // 1 FPS
-#define MODE_BYPASS_UAC1        USB_IN_FLAG    //  2 BYPASS 
+#define MODE_BYPASS_UAC1        I2S_IN_FLAG     //  6 BYPASS 
 #define MODE_BR_UAC2            OPT_IN_FLAG    // 3 BR
 #define MODE_V71_UAC2           UAC1_IN_FLAG   // 4 V71
 #define MODE_V71_UAC1           BT_IN_FLAG    //  5 UAC1 
-#define MODE_FPS_UAC1           I2S_IN_FLAG    // 6 UAC1 
+#define MODE_FPS_UAC1           USB_IN_FLAG    // 2 FPS UAC1 
 
 extern unsigned g_host_os;  // 1 -> Windows, 2 -> Others
 audio_sampling g_new_playback_format, g_playback_format;
@@ -121,8 +121,8 @@ timer tm;
 // 改动原因：新增C1模式持久化文件路径，使用LittleFS保存mode按键状态，保证断电重启后可恢复。
 #define C1_MODE_VALUE_PATH    "c1_mode_value"
 
-// 改动原因：产品仅保留两档——1=BYPASS_UAC1(灯灭)、4=FPS_UAC1(橙灯常亮)；灯索引与 c1_mode 同值下发 tile1。
-#define C1_MODE_VALUE_DEFAULT 1
+// 改动原因：产品仅保留两档——1=BYPASS_UAC1(灯灭)、4=FPS_UAC1(橙灯常亮)；默认 4=FPS；灯索引与 c1_mode 同值下发 tile1。
+#define C1_MODE_VALUE_DEFAULT 4
 #define C1_MODE_VALUE_MIN     1
 #define C1_MODE_VALUE_MAX     4
 
@@ -1970,7 +1970,7 @@ void app_control_slave(server interface c1_led_ctrl_if i_c1_led_ctrl)
 {
     // 改动原因：tile1 先于 tile0 运行，上电先把硬件灯全灯且不调用 apply，避免用占位 mic/mode 组合误亮；shadow 置为全灯灯电平便于首包 set_* 时 apply 与端口一致。
     unsigned led_shadow = 0xF;
-    unsigned mode_led_color_idx = 1;
+    unsigned mode_led_color_idx = C1_MODE_VALUE_DEFAULT;
     unsigned mic_mute_switch = 1;
     c1_panel_leds_force_all_off_hw();
 
diff --git a/sw_usb_audio/app_usb_aud_fosi_c1_lp/src/extensions/audiohw.xc b/sw_usb_audio/app_usb_aud_fosi_c1_lp/src/extensions/audiohw.xc
index 92f21fe..0eec16f 100644
--- a/sw_usb_audio/app_usb_aud_fosi_c1_lp/src/extensions/audiohw.xc
+++ b/sw_usb_audio/app_usb_aud_fosi_c1_lp/src/extensions/audiohw.xc
@@ -34,11 +34,11 @@ extern "C" {
 #define DISABLE_REBOOT 1
 
 #define MODE_FPS_UAC2           COAX_IN_FLAG   // 1 FPS
-#define MODE_BYPASS_UAC1        USB_IN_FLAG    //  2 BYPASS 
+#define MODE_BYPASS_UAC1        I2S_IN_FLAG     //  6 BYPASS 
 #define MODE_BR_UAC2            OPT_IN_FLAG    // 3 BR
 #define MODE_V71_UAC2           UAC1_IN_FLAG   // 4 V71
 #define MODE_V71_UAC1           BT_IN_FLAG    //  5 UAC1 
-#define MODE_FPS_UAC1           I2S_IN_FLAG    // 6 UAC1 
+#define MODE_FPS_UAC1           USB_IN_FLAG    // 2 FPS UAC1 
 
 extern unsigned g_host_os;  // 1 -> Windows, 2 -> Others
 audio_sampling g_new_playback_format, g_playback_format;
@@ -121,8 +121,8 @@ timer tm;
 // 改动原因：新增C1模式持久化文件路径，使用LittleFS保存mode按键状态，保证断电重启后可恢复。
 #define C1_MODE_VALUE_PATH    "c1_mode_value"
 
-// 改动原因：产品仅保留两档——1=BYPASS_UAC1(灯灭)、4=FPS_UAC1(橙灯常亮)；灯索引与 c1_mode 同值下发 tile1。
-#define C1_MODE_VALUE_DEFAULT 1
+// 改动原因：产品仅保留两档——1=BYPASS_UAC1(灯灭)、4=FPS_UAC1(橙灯常亮)；默认 4=FPS；灯索引与 c1_mode 同值下发 tile1。
+#define C1_MODE_VALUE_DEFAULT 4
 #define C1_MODE_VALUE_MIN     1
 #define C1_MODE_VALUE_MAX     4
 
@@ -1973,7 +1973,7 @@ void app_control_slave(server interface c1_led_ctrl_if i_c1_led_ctrl, chanend c_
 {
     // 改动原因：tile1 先于 tile0 运行，上电先把硬件灯全灯且不调用 apply，避免用占位 mic/mode 组合误亮；shadow 置为全灯灯电平便于首包 set_* 时 apply 与端口一致。
     unsigned led_shadow = 0xF;
-    unsigned mode_led_color_idx = 1;
+    unsigned mode_led_color_idx = C1_MODE_VALUE_DEFAULT;
     unsigned mic_mute_switch = 1;
     c1_panel_leds_force_all_off_hw();