diff --git a/app/ktv_adapter.py b/app/ktv_adapter.py
index 1182666..9f043a9 100644
--- a/app/ktv_adapter.py
+++ b/app/ktv_adapter.py
@@ -197,7 +197,7 @@ async def handle_video_preparing(tenant_id, task_id, step_name, input_data, conf
 # ── Demucs ─────────────────────────────────────────────────────────
 
 async def handle_demucs_separating(tenant_id, task_id, step_name, input_data, config):
-    """通过 API 调 ky-demucs-separate。"""
+    """通过 API 调 ky-demucs-separate。固定使用 separate_full 模式。"""
     work_dir = _task_dir(task_id)
     audio_path = None
     for dep_output in input_data.values():
@@ -209,21 +209,25 @@ async def handle_demucs_separating(tenant_id, task_id, step_name, input_data, co
 
     client = get_ktv_client()
     result = await client.call(STEP_MODELS["demucs_separating"],
-                               {"audio_file": audio_path})
+                               {"audio_file": audio_path,
+                                "task_type": "separate_full"})
 
     if result.get("error"):
         raise ValueError(f"Demucs 分离失败: {result['error']}")
 
     # 下载结果文件
     vocals_local = os.path.join(work_dir, "vocals.wav")
-    no_vocals_local = os.path.join(work_dir, "no_vocals.wav")
+    accompaniment_local = os.path.join(work_dir, "accompaniment.wav")
     if result.get("vocals_url"):
         await _download(result["vocals_url"], vocals_local)
     if result.get("accompaniment_url"):
-        await _download(result["accompaniment_url"], no_vocals_local)
+        await _download(result["accompaniment_url"], accompaniment_local)
 
-    return {"vocals_path": vocals_local, "no_vocals_path": no_vocals_local,
-            "mode": "2stem", "usage": result.get("usage", {})}
+    return {"vocals_path": vocals_local,
+            "no_vocals_path": accompaniment_local,
+            "accompaniment_path": accompaniment_local,
+            "mode": "separate_full",
+            "usage": result.get("usage", {})}
 
 
 # ── Lyric Calibration ──────────────────────────────────────────────