[AlphaDream] Small cleanup

Author: Kermalis

VG Music Studio/Core/GBA/AlphaDream/Track.cs

@@ -27,9 +27,16 @@ public int GetPitch()
         public Track(byte i, Mixer mixer)
         {
             Index = i;
-            // TODO: PSG Channels 3 and 4 are also usable
-            Type = i >= 8 ? i % 2 == 0 ? "Square 1" : "Square 2" : "PCM8";
-            Channel = i >= 8 ? (Channel)new SquareChannel(mixer) : new PCMChannel(mixer);
+            if (i >= 8)
+            {
+                Type = Utils.PSGTypes[i & 3];
+                Channel = new SquareChannel(mixer); // TODO: PSG Channels 3 and 4
+            }
+            else
+            {
+                Type = "PCM8";
+                Channel = new PCMChannel(mixer);
+            }
         }
         // 0x819B040
         public void Init()

VG Music Studio/Core/GBA/Utils.cs

@@ -7,5 +7,7 @@ internal static class Utils
 
         public const int CartridgeOffset = 0x08000000;
         public const int CartridgeCapacity = 0x02000000;
+
+        public static readonly string[] PSGTypes = new string[4] { "Square 1", "Square 2", "PCM4", "Noise" };
     }
 }