diff --git a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc
index ca1351b..032b733 100644
--- a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc
+++ b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc
@@ -2164,7 +2164,11 @@ void mute_handler(chanend c_mic_det)
 {
     // 开机mute sequence
     p_ctl_mute <: 0;
+#if UAC1_MODE == 1
+    delay_milliseconds(3000);
+#else
     delay_milliseconds(1000);
+#endif
     p_ctl_mute <: 0xf;
 
     // mic detect: bit1=mic1 (插入=高, 拔出=低), bit2=mic2 (插入=低, 拔出=高)