diff --git a/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/dsp.c b/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/dsp.c
index fa31453..c5011cd 100644
--- a/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/dsp.c
+++ b/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/dsp.c
@@ -329,6 +329,39 @@ void UserBufferManagementInit(unsigned sampFreq)
       memset(ubm_ingress, 0, sizeof(ubm_ingress));  // 清掉哑帧输出
 }
 float fLevel[NUM_USB_CHAN_OUT] = {0,};
+
+#if USE_EX3D == 1 && (HID_CONTROLS > 0)
+/* CMD_GET(CMD_LEVEL) = 0x8D | 0x0100 */
+#define EX3D_HID_CMD_GET_LEVEL  0x18Du
+
+/* 改动原因：HID process_send_params 在 tile0，fLevel 由 tile0 UserBufferManagement 更新；
+ * CMD_LEVEL 不再转发 tile1，直接读本 tile 的 fLevel 填入 ex3d_b0b1_result。 */
+void ex3d_hid_fill_cmd_level_on_tile0(unsigned *send_buf_words, uint32_t ch_num)
+{
+    unsigned idx = 1;
+    unsigned ex3d_en = 0;
+    uint32_t ch;
+
+    if (ch_num > (uint32_t)NUM_USB_CHAN_OUT) {
+        ch_num = (uint32_t)NUM_USB_CHAN_OUT;
+    }
+
+    GET_SHARED_GLOBAL(ex3d_en, g_3d_enable);
+    send_buf_words[idx++] = EX3D_HID_CMD_GET_LEVEL;
+
+    for (ch = 0; ch < ch_num; ch++) {
+        union { float f; unsigned u; } conv;
+
+        if (ex3d_en) {
+            conv.f = fLevel[ch];
+        } else {
+            conv.f = 0.0f;
+        }
+        send_buf_words[idx++] = conv.u;
+    }
+}
+#endif /* USE_EX3D && HID_CONTROLS */
+
 enum {UBM_A3D_OFF=0, UBM_A3D_VON=1, UBM_A3D_ON=2};
 extern unsigned int is_eq_disabled(void);
 extern unsigned int g_eq_enable;
@@ -783,8 +816,9 @@ void hid_receive_task_in_c(unsigned char * RcvData, unsigned * SendData)
 
             if(ChNum > NUM_USB_CHAN_OUT) ChNum = NUM_USB_CHAN_OUT;
 
+            /* 改动原因：0xB1 CMD_LEVEL 已在 tile0 eq.c 处理；此处仅保留经 c_hidRcvData 到 tile1 的兼容路径 */
             // debug_printf("Get CMD_LEVEL : %d, %d\r\n", ChNum, NUM_USB_CHAN_OUT);
-            for (int i = 0; i < ChNum; i++) {
+            for (int i = 0; i < (int)ChNum; i++) {
                 pSendBuf[idx++] = pLevel[i];
                 // debug_printf("%08x, ", pLevel[i] );
             }
diff --git a/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/eq.c b/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/eq.c
index e44ac7e..7c5adda 100644
--- a/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/eq.c
+++ b/sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/eq.c
@@ -477,6 +477,8 @@ extern unsigned g_hid_angle_save_request;
 extern unsigned g_hid_angle_save_channel;
 extern unsigned g_hid_angle_values[8];
 void SetEx3dHidChan(chanend_t c) { g_ex3d_hid_chanend = c; }
+/* 改动原因：CMD_LEVEL 在 tile0 读 fLevel，见 process_send_params 中 0xB1/0x18D 分支 */
+void ex3d_hid_fill_cmd_level_on_tile0(unsigned *send_buf_words, uint32_t ch_num);
 #endif
 
 // 0x84 FACTORY_RESET: 删除Flash参数后触发重启（由button_task轮询执行）
@@ -836,7 +838,7 @@ unsigned char process_send_params(uint8_t data[], uint16_t len) {
     }
 
     // 处理发送/读取EX3D命令 (0xB0/0xB1) - SET_EX3D_CMD / GET_EX3D_CMD
-    // 数据通过 g_ex3d_hid_chanend 直接传到tile1的hid_button_task执行，结果同步返回
+    // 多数命令经 g_ex3d_hid_chanend 到 tile1；CMD_LEVEL(0x18D) 在 tile0 读 fLevel，不转发 tile1
     if (data[1] == 0xB0 || data[1] == 0xB1) {
 #if (USE_EX3D == 1) && (HID_CONTROLS == 1)
         if (!g_ex3d_hid_chanend) return false;
@@ -853,6 +855,20 @@ unsigned char process_send_params(uint8_t data[], uint16_t len) {
         if (params_len > 0) memcpy(ex3d_request.ex3d_params, &data[6], params_len);
         ex3d_request.pending_cmd = data[1];
 
+        /* 改动原因：HID/UBM 同在 tile0，电平由 UserBufferManagement 写入 fLevel[]；
+         * GET CMD_LEVEL 无需经 tile1，避免读 tile1 空副本。 */
+        if (data[1] == 0xB1 && ex3d_cmd == 0x18Du) {
+            uint32_t ch_num = 0;
+
+            if (params_len >= 4) {
+                ch_num = (uint32_t)data[6] | ((uint32_t)data[7] << 8) |
+                         ((uint32_t)data[8] << 16) | ((uint32_t)data[9] << 24);
+            }
+            memset(ex3d_b0b1_result, 0, sizeof(ex3d_b0b1_result));
+            ex3d_hid_fill_cmd_level_on_tile0(ex3d_b0b1_result, ch_num);
+            return true;
+        }
+
         // 若是SET CMD_EXPAND_GAIN (0x93)，同步更新footstep LED状态
         if (data[1] == 0xB0 && ex3d_cmd == 0x93 && params_len >= 4) {
             uint32_t gain_val = (uint32_t)data[6] | ((uint32_t)data[7] << 8) |