diff --git a/Assets/Scripts/OCES/Audio/HandWritten/LongAudio/BeatClock.cs b/Assets/Scripts/OCES/Audio/HandWritten/LongAudio/BeatClock.cs
index 2113491..92eece1 100644
--- a/Assets/Scripts/OCES/Audio/HandWritten/LongAudio/BeatClock.cs
+++ b/Assets/Scripts/OCES/Audio/HandWritten/LongAudio/BeatClock.cs
@@ -28,25 +28,49 @@ namespace OCES.Audio
 
         internal void Restart(MusicContainer container, float inheritedBpm, double dspTime)
         {
-            //Debug.Log($"[BeatClock] Restart called, container={container.Id}, bpm={container.Bpm}, inherited={inheritedBpm}");
-            
             StopAll();
             this.m_blendError = this.m_stopped = false;
             this.m_containerId = container.Id;
             this.m_startDspTime = dspTime;
-            
 
-            // BPM：优先用自己的，为 0 则用传入的继承值，最终回退 120
+            // BPM：优先用自己的，为 0 则用传入的继承值
             float bpm = container.Bpm > 0f ? container.Bpm : inheritedBpm;
-            if (bpm <= 30f) bpm = 120f; // 没见过速度小于30bpm的音乐，小于30要么是数填错了，要么是有奇怪的情况。要是真有这么慢的音乐再处理吧。
+            if (bpm <= 30f)
+            {
+                // BPM 无效，不启动任何回调
+                return;
+            }
             this.m_secondsPerBeat = 60 / bpm;
 
-            this.m_beatsPerBar = MusicContainerConfig.GetBeatsPerBar(container.TimeSig);  // 沿用现有的解析逻辑
-            this.m_barsPerGrid = container.Grid > 0 ? container.Grid : 4;
+            // TimeSig：检查是否有效
+            bool hasTimeSig = !string.IsNullOrEmpty(container.TimeSig);
+            if (hasTimeSig)
+            {
+                this.m_beatsPerBar = MusicContainerConfig.GetBeatsPerBar(container.TimeSig);
+            }
 
+            // Grid：检查是否有效
+            bool hasGrid = container.Grid > 0;
+            if (hasGrid)
+            {
+                this.m_barsPerGrid = container.Grid;
+            }
+
+            // 分层启动协程
+            // Beat：只要 BPM 有效就启动
             this.m_beatCoroutine = this.m_host.StartCoroutine(BeatCoroutine());
-            this.m_barCoroutine  = this.m_host.StartCoroutine(BarCoroutine());
-            this.m_gridCoroutine = this.m_host.StartCoroutine(GridCoroutine());
+
+            // Bar：TimeSig 有效时启动
+            if (hasTimeSig)
+            {
+                this.m_barCoroutine = this.m_host.StartCoroutine(BarCoroutine());
+            }
+
+            // Grid：TimeSig 和 Grid 都有效时启动
+            if (hasTimeSig && hasGrid)
+            {
+                this.m_gridCoroutine = this.m_host.StartCoroutine(GridCoroutine());
+            }
         }
 
         internal void OnBlendError(MusicContainer container)