Refactor

Util/AudioSpectrumGenerator.cs

@@ -13,7 +13,7 @@ namespace ADOFAIRenderer.Util
         public static int TotalSamples { get; private set; }
 
         private static long _cachedFrame = -1;
-        private static readonly Dictionary<int, float[]> CachedSpectrums = new Dictionary<int, float[]>();
+        private static readonly Dictionary<int, float[]> CachedSpectrums = new();
 
         public static void Initialize(AudioClip? clip)
         {