Fix Audio Mixer Cleanup Issue

Util/OfflineAudioMixer.cs

@@ -327,8 +327,15 @@ namespace ADOFAIRenderer.Util
                 for (int s = 0; s < samplesNeeded; s++)
                 {
                     double sampleTime = frameStartTime + (double)s / _targetSampleRate;
-                    double elapsed = sampleTime - ev.StartTime;
 
+                    // If it is a looping sound and has reached or exceeded its end time, stop playing.
+                    if (ev.EndTime >= 0 && sampleTime >= ev.EndTime)
+                    {
+                        isSoundFinished = true;
+                        break;
+                    }
+
+                    double elapsed = sampleTime - ev.StartTime;
                     if (elapsed < 0) continue; // Sound hasn't started yet
 
                     double soundTime = elapsed * ev.Pitch;
@@ -340,15 +347,9 @@ namespace ADOFAIRenderer.Util
                             isSoundFinished = true;
                             break;
                         }
-                        else // Looping
-                        {
-                            if (sampleTime >= ev.EndTime)
-                            {
-                                isSoundFinished = true;
-                                break;
-                            }
-                            soundTime %= clipData.Duration;
-                        }
+
+                        // Looping
+                        soundTime %= clipData.Duration;
                     }
 
                     // Linear interpolation for pitch shifting in the mixer loop
@@ -368,8 +369,8 @@ namespace ADOFAIRenderer.Util
                     }
                 }
 
-                // Clean up finished one-shot sounds
-                if (isSoundFinished && ev.EndTime < 0)
+                // Clean up finished sound events (both one-shot and looping)
+                if (isSoundFinished)
                 {
                     ActiveEvents.RemoveAt(i);
                 }