- handle controlChangeMessage for buttons

Lib.Audio/Channel.cs

@@ -122,6 +122,11 @@ namespace Lib.Audio
             {
                 if (Fader != null && Fader.Controller == controlChangeMessage.Controller)
                     Fader.Position = controlChangeMessage.Value;
+                else
+                {
+                    IButton? button = Buttons.FirstOrDefault(b => b.Controller == controlChangeMessage.Controller);
+                    button?.HandlePressed(Controllable, (Velocity) controlChangeMessage.Value);
+                }
             }
         }