diff --git a/bin/backend_accounting.py b/bin/backend_accounting.py
index df16f825..91c52558 100644
--- a/bin/backend_accounting.py
+++ b/bin/backend_accounting.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
-独立运行的LLM后台计费程序。
-从 sage.py 的 llmage 模块中提取，避免多进程模式下重复运行。
+独立运行的产品后台计费程序。
+产品记账已从 llmage 迁移到 product_management 模块。
 """
 import os
 import sys
@@ -25,16 +25,13 @@ from llmage.init import load_llmage
 from pricing.init import load_pricing
 from discount.init import load_discount
 from dapi.init import load_dapi
+from product_management import get_manager
 
 # 初始化配置
 p = ProgramPath()
 config = getConfig(NS={'workdir': os.getcwd(), 'ProgramPath': p})
 DBPools(config.databases)
 
-# 导入 llmage 的计费函数
-from llmage.accounting import (
-	backend_accounting
-)
 def get_module_dbname(m):
 	return 'sage'
 
@@ -62,8 +59,11 @@ def main():
 	load_pricing()
 	load_discount()
 	load_dapi()
+	load_llmage()
+	
+	manager = get_manager()
 	try:
-		loop.run_until_complete(backend_accounting())
+		loop.run_until_complete(manager.backend_accounting())
 	except asyncio.CancelledError:
 		pass
 	finally:
diff --git a/scripts/demucs-status.dspy b/scripts/demucs-status.dspy
index 72de3cff..aa8c9f2e 100644
--- a/scripts/demucs-status.dspy
+++ b/scripts/demucs-status.dspy
@@ -1,54 +1,29 @@
 # Demucs 任务状态查询
-# 部署到: /data/ymq/demucs-service/app/api/demucs-status.dspy
 # GET /demucs/api/demucs-status?task_id=xxx
-import json
-
 task_id = params_kw.task_id
 if not task_id:
     return {"error": "task_id is required"}
 
 env = request._run_ns
 longtasks = env.longtasks
+if not longtasks:
+    return {"error": "longtasks not available"}
 
-# longtasks 内部通过 Redis 存储结果，key 格式: {queue_name}:result:{task_id}
-import redis.asyncio as redis
-r = redis.Redis(host='127.0.0.1', port=6379, db=0, decode_responses=True)
+task = await longtasks.get_redis_task(task_id)
+if not task or not task.get("created_at"):
+    return {"task_id": task_id, "status": "not_found"}
 
-# 尝试获取结果
-result_key = f"demucs:result:{task_id}"
-raw = await r.get(result_key)
+status = task.get("status", "unknown")
+result = {"task_id": task_id, "status": status}
 
-if raw:
-    data = json.loads(raw)
-    return {
-        "task_id": task_id,
-        "status": "SUCCEEDED",
-        "vocals_url": data.get("vocals_path", ""),
-        "accompaniment_url": data.get("accompaniment_path", ""),
-        "duration": data.get("duration", 0),
-        "usage": data.get("usage", {"次": 1}),
-    }
+if status == "SUCCEEDED":
+    data = task.get("result", {})
+    result["vocals_url"] = data.get("vocals_path", "")
+    result["accompaniment_url"] = data.get("accompaniment_path", "")
+    result["duration"] = data.get("duration", 0)
+    # worker 须在 result 中包含 usage 字段
+    result["usage"] = data.get("usage", {"audio_seconds": data.get("duration", 0)})
+elif status == "FAILED":
+    result["error"] = task.get("error", str(task.get("result", "")))
 
-# 检查是否在队列中
-queue_key = f"demucs:queue"
-in_queue = await r.lrange(queue_key, 0, -1)
-for item in in_queue:
-    try:
-        item_data = json.loads(item)
-        if item_data.get("task_id") == task_id:
-            return {"task_id": task_id, "status": "queued"}
-    except:
-        pass
-
-# 检查是否在处理中
-processing_key = f"demucs:processing"
-processing = await r.get(processing_key)
-if processing:
-    try:
-        proc_data = json.loads(processing)
-        if proc_data.get("task_id") == task_id:
-            return {"task_id": task_id, "status": "processing"}
-    except:
-        pass
-
-return {"task_id": task_id, "status": "not_found"}
+return result
diff --git a/scripts/demucs_worker_usage_fix.py b/scripts/demucs_worker_usage_fix.py
new file mode 100644
index 00000000..d6501a7d
--- /dev/null
+++ b/scripts/demucs_worker_usage_fix.py
@@ -0,0 +1,9 @@
+# Patch for /data/ymq/demucs-service/workers/separate.py
+# In run_separate_full(), ensure the return dict includes:
+#   "usage": {"audio_seconds": duration}
+
+# Find the return statement in run_separate_full and add usage field.
+# The function currently returns something like:
+#   return {"vocals_path": ..., "accompaniment_path": ..., "duration": ...}
+# 
+# Add: "usage": {"audio_seconds": result.get("duration", 0)}
diff --git a/scripts/ktv_uapi_migration_p1_uapiio.sql b/scripts/ktv_uapi_migration_p1_uapiio.sql
index 1e99ee4e..6950755a 100644
--- a/scripts/ktv_uapi_migration_p1_uapiio.sql
+++ b/scripts/ktv_uapi_migration_p1_uapiio.sql
@@ -51,12 +51,6 @@ INSERT INTO uapiio (id, name, description, input_fields) VALUES (
   '{"audio_file":{"type":"string","required":true,"description":"音频文件URL"},"scene":{"type":"string","required":false,"default":"pop","description":"场景类型"}}'
 ) ON DUPLICATE KEY UPDATE description=VALUES(description), input_fields=VALUES(input_fields);
 
--- 音乐合成（异步）
-INSERT INTO uapiio (id, name, description, input_fields) VALUES (
-  'ktv_synth_generate_io', 'KTV音乐合成', 'AI歌声合成（异步任务）',
-  '{"lyrics":{"type":"string","required":true,"description":"歌词文本"},"style":{"type":"string","required":false,"default":"pop","description":"演唱风格"},"audio_file":{"type":"string","required":false,"description":"参考音频URL（声音克隆）"}}'
-) ON DUPLICATE KEY UPDATE description=VALUES(description), input_fields=VALUES(input_fields);
-
 -- 合成状态查询
 INSERT INTO uapiio (id, name, description, input_fields) VALUES (
   'ktv_synth_status_io', 'KTV合成状态', '查询音乐合成任务状态',
diff --git a/scripts/ktv_uapi_migration_p2_uapi.sql b/scripts/ktv_uapi_migration_p2_uapi.sql
index 9fc823ab..b7cac99a 100644
--- a/scripts/ktv_uapi_migration_p2_uapi.sql
+++ b/scripts/ktv_uapi_migration_p2_uapi.sql
@@ -52,13 +52,7 @@ UPDATE uapi SET stream='sync',headers='{"Content-Type":"application/json"}',
   response='{%if error%}{"error":"{{error}}"}{%else%}{"status":"{{status}}","score":{{score}},"details":{{json.dumps(details,ensure_ascii=False)}},"usage":{{json.dumps(usage,ensure_ascii=False)}}}{%endif%}',
   ioid='ktv_songrate_evaluate_io' WHERE id='uapi_ktv_songrate_evaluate';
 
--- 9. 音乐合成 (async提交)
-UPDATE uapi SET stream='async',headers='{"Content-Type":"application/json"}',
-  data='{"lyrics":"{{lyrics}}"{%if style%},"style":"{{style}}"{%endif%}{%if audio_file%},"audio_file":"{{audio_file}}"{%endif%}}',
-  response='{"taskid":"{{task_id}}","taskstatus":"PENDING"}',
-  ioid='ktv_synth_generate_io' WHERE id='uapi_ktv_synth_generate';
-
--- 10. 合成状态查询 (sync)
+-- 9. 合成状态查询 (sync)
 UPDATE uapi SET stream='sync',headers='{"Content-Type":"application/json"}',
   data='{"task_id":"{{task_id}}"}',
   response='{%if error%}{"error":"{{error}}"}{%elif status=="SUCCEEDED"%}{"taskstatus":"SUCCEEDED","output_url":"{{output_url}}","usage":{{json.dumps(usage,ensure_ascii=False)}}}{%elif status=="FAILED"%}{"taskstatus":"FAILED","error":"{{error}}"}{%else%}{"taskstatus":"PENDING"}{%endif%}',
@@ -89,7 +83,6 @@ UPDATE uapi SET stream='sync',headers='{"Content-Type":"application/json"}',
   ioid='ktv_video_eval_evaluate_io' WHERE id='uapi_ktv_video_eval_evaluate';
 
 -- async query_apiname
-UPDATE llm_api_map SET query_apiname='synth-status',query_period=5 WHERE llmid='llm_ktv_synth_generate';
 UPDATE llm_api_map SET query_apiname='realesrgan-status',query_period=3 WHERE llmid='llm_ktv_realesrgan_upscale';
 
 -- ppid (v1/models 过滤要求 ppid IS NOT NULL)
diff --git a/scripts/ktv_uapi_migration_p4_pricing.sql b/scripts/ktv_uapi_migration_p4_pricing.sql
index 6269872e..a4e8f841 100644
--- a/scripts/ktv_uapi_migration_p4_pricing.sql
+++ b/scripts/ktv_uapi_migration_p4_pricing.sql
@@ -13,7 +13,7 @@ INSERT INTO pricing_program (id,providerid,name) VALUES
 ('pp_ktv_subtitle','FZoJv7EUEdKL3pUt0BQ5S','KTV-字幕渲染'),
 ('pp_ktv_merge','FZoJv7EUEdKL3pUt0BQ5S','KTV-视频合并'),
 ('pp_ktv_songrate','FZoJv7EUEdKL3pUt0BQ5S','KTV-歌曲评分'),
-('pp_ktv_synth','FZoJv7EUEdKL3pUt0BQ5S','KTV-音乐合成'),
+
 ('pp_ktv_synth_status','FZoJv7EUEdKL3pUt0BQ5S','KTV-合成状态'),
 ('pp_ktv_realesrgan','FZoJv7EUEdKL3pUt0BQ5S','KTV-超分辨率'),
 ('pp_ktv_realesrgan_status','FZoJv7EUEdKL3pUt0BQ5S','KTV-超分状态'),
@@ -30,7 +30,7 @@ UPDATE pricing_program_timing SET ppid='pp_ktv_face_compare' WHERE id='pt_ktv_fa
 UPDATE pricing_program_timing SET ppid='pp_ktv_subtitle' WHERE id='pt_ktv_subtitle_render';
 UPDATE pricing_program_timing SET ppid='pp_ktv_merge' WHERE id='pt_ktv_merge_video';
 UPDATE pricing_program_timing SET ppid='pp_ktv_songrate' WHERE id='pt_ktv_songrate_evaluate';
-UPDATE pricing_program_timing SET ppid='pp_ktv_synth' WHERE id='pt_ktv_synth_generate';
+
 UPDATE pricing_program_timing SET ppid='pp_ktv_synth_status' WHERE id='pt_ktv_synth_status';
 UPDATE pricing_program_timing SET ppid='pp_ktv_realesrgan' WHERE id='pt_ktv_realesrgan_upscale';
 UPDATE pricing_program_timing SET ppid='pp_ktv_realesrgan_status' WHERE id='pt_ktv_realesrgan_status';
@@ -89,7 +89,7 @@ UPDATE llm_api_map SET ppid='pp_ktv_face_compare' WHERE llmid='llm_ktv_face_comp
 UPDATE llm_api_map SET ppid='pp_ktv_subtitle' WHERE llmid='llm_ktv_subtitle_render';
 UPDATE llm_api_map SET ppid='pp_ktv_merge' WHERE llmid='llm_ktv_merge_video';
 UPDATE llm_api_map SET ppid='pp_ktv_songrate' WHERE llmid='llm_ktv_songrate_evaluate';
-UPDATE llm_api_map SET ppid='pp_ktv_synth' WHERE llmid='llm_ktv_synth_generate';
+
 UPDATE llm_api_map SET ppid='pp_ktv_synth_status' WHERE llmid='llm_ktv_synth_status';
 UPDATE llm_api_map SET ppid='pp_ktv_realesrgan' WHERE llmid='llm_ktv_realesrgan_upscale';
 UPDATE llm_api_map SET ppid='pp_ktv_realesrgan_status' WHERE llmid='llm_ktv_realesrgan_status';
diff --git a/scripts/ktv_uapi_migration_p5_datafix.sql b/scripts/ktv_uapi_migration_p5_datafix.sql
index 96ceed8c..2aa1cf07 100644
--- a/scripts/ktv_uapi_migration_p5_datafix.sql
+++ b/scripts/ktv_uapi_migration_p5_datafix.sql
@@ -27,9 +27,6 @@ UPDATE uapi SET data='{%set c=joiner(",")%}{{%if video_file%}{{c()}}"video_url":
 -- songrate: audio_file→audio_path
 UPDATE uapi SET data='{"audio_path":"{{audio_file}}"{%if scene%},"scene":"{{scene}}"{%endif%}}' WHERE id='uapi_ktv_songrate_evaluate';
 
--- synth-gen: audio_file→audio_path
-UPDATE uapi SET data='{"lyrics":"{{lyrics}}"{%if style%},"style":"{{style}}"{%endif%}{%if audio_file%},"audio_path":"{{audio_file}}"{%endif%}}' WHERE id='uapi_ktv_synth_generate';
-
 -- synth-status: GET, params in query string, no body
 UPDATE uapi SET httpmethod='GET', data=NULL, path='/synth/api/synth-status?task_id={{task_id}}' WHERE id='uapi_ktv_synth_status';