diff --git a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/CMakeLists.txt b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/CMakeLists.txt
index 8063221..286ca07 100644
--- a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/CMakeLists.txt
+++ b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/CMakeLists.txt
@@ -38,7 +38,7 @@ endif()
 # Firmware version (maps to BCD_DEVICE_J.M.N in USB descriptor)
 set(FW_VER_J 1)
 set(FW_VER_M 1)
-set(FW_VER_N 14)
+set(FW_VER_N 15)
 set(FW_VERSION "v${FW_VER_J}.${FW_VER_M}.${FW_VER_N}")
 
 set(SW_USB_AUDIO_FLAGS ${EXTRA_BUILD_FLAGS} -Os
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 10e5aad..6653234 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
@@ -287,6 +287,7 @@ static inline i2c_regop_res_t NAU88C22_REGWRITE(unsigned reg, unsigned val, clie
     }
     else
     {
+        debug_printf("I2C write success: reg=%08x, val=%08x\n", reg, val);
         //debug_printf("I2C write success: reg=");
         //printhex(reg);
         //debug_printf(", val=");
@@ -1249,8 +1250,15 @@ void button_task(chanend c_hidSendData, chanend cc_mic_level, chanend c_uac_vol,
                     mic_det_muted = 0;
                     // 恢复音量，但如果用户手动mute了则不恢复
                     if (!flag_mic_mute) {
-                        mic_volume(codec_adc_pga_gain_reg_value);
-                        debug_printf("mic_det: unmute -> pga=%d\n", codec_adc_pga_gain_reg_value);
+                        // 改动原因（关键修复）：
+                        // codec_adc_pga_gain_reg_value 在当前版本保存的是 49级HID音量等级(0~48)，不是Codec寄存器原始值。
+                        // 这里之前直接写 mic_volume(codec_adc_pga_gain_reg_value) 会绕过统一映射逻辑，
+                        // 造成“插拔后恢复增益”与“旋钮/HID设置增益”不一致，表现为录音音量异常（偏小/不稳定）。
+                        // 必须与其它路径保持一致，先做 HID->Codec PGA 映射再写寄存器。
+                        unsigned codec_gain = mic_hid_level_to_codec_gain(codec_adc_pga_gain_reg_value);
+                        mic_volume(codec_gain);
+                        debug_printf("mic_det: unmute -> hid=%d codec_pga=%d\n",
+                                     codec_adc_pga_gain_reg_value, codec_gain);
                     }
                 } else if (mic_det_cmd == MIC_DET_DAC_MUTE) {
                     dac_det_muted = 1;