Config option to define middle C

Closes #74

Author: Kermalis

VG Music Studio/Config.yaml

@@ -5,6 +5,7 @@ PanpotIndicators: False            # True or False
 PlaylistMode: "Random"             # "Random" or "Sequential"                                  # The way the playlist will behave
 PlaylistSongLoops: 0               # Loops >= 0 and Loops <= 9223372036854775807               # How many times a song should loop before fading out
 PlaylistFadeOutMilliseconds: 10000 # Milliseconds >= 0 and Milliseconds <= 9223372036854775807 # How many milliseconds it should take to fade out of a song
+MiddleCOctave: 5                   # Octave >= --128 and Octave <= 127                         # The octave that holds middle C. Used in the visual and track viewer
 Colors:
   0: {H: 185, S: 240, L: 180}
   1: {H: 183, S: 240, L: 170}

VG Music Studio/Core/GlobalConfig.cs

@@ -24,6 +24,7 @@ internal sealed class GlobalConfig
         public readonly PlaylistMode PlaylistMode;
         public readonly long PlaylistSongLoops;
         public readonly long PlaylistFadeOutMilliseconds;
+        public readonly sbyte MiddleCOctave;
         public readonly HSLColor[] Colors;
 
         private GlobalConfig()
@@ -44,6 +45,7 @@ private GlobalConfig()
                     PlaylistMode = mapping.GetValidEnum<PlaylistMode>(nameof(PlaylistMode));
                     PlaylistSongLoops = mapping.GetValidValue(nameof(PlaylistSongLoops), 0, long.MaxValue);
                     PlaylistFadeOutMilliseconds = mapping.GetValidValue(nameof(PlaylistFadeOutMilliseconds), 0, long.MaxValue);
+                    MiddleCOctave = (sbyte)mapping.GetValidValue(nameof(MiddleCOctave), sbyte.MinValue, sbyte.MaxValue);
 
                     var cmap = (YamlMappingNode)mapping.Children[nameof(Colors)];
                     Colors = new HSLColor[256];

VG Music Studio/Util/Utils.cs

@@ -1,4 +1,5 @@
-using Kermalis.VGMusicStudio.Properties;
+using Kermalis.VGMusicStudio.Core;
+using Kermalis.VGMusicStudio.Properties;
 using System;
 using System.Collections.Generic;
 using System.Globalization;
@@ -141,7 +142,7 @@ public static string GetPianoKeyName(int key)
         }
         public static string GetNoteName(int key)
         {
-            return _notes[key % 12] + ((key / 12) - 2);
+            return _notes[key % 12] + ((key / 12) + (GlobalConfig.Instance.MiddleCOctave - 5));
         }
 
         public static string CombineWithBaseDirectory(string path)