Fixed application-shutdown problems

KeyboardAudioVisualizer/ApplicationManager.cs

@@ -72,7 +72,12 @@ namespace KeyboardAudioVisualizer
             _configurationWindow.Show();
         }
 
-        private void Exit() => Application.Current.Shutdown();
+        private void Exit()
+        {
+            RGBSurface.Instance.Dispose();
+            AudioProcessor.Instance.Dispose();
+            Application.Current.Shutdown();
+        }
 
         #endregion
     }

KeyboardAudioVisualizer/AudioCapture/CSCoreAudioInput.cs

@@ -38,6 +38,12 @@ namespace KeyboardAudioVisualizer.AudioCapture
             _capture.Start();
         }
 
+        public void Dispose()
+        {
+            _capture?.Stop();
+            _capture?.Dispose();
+        }
+
         private void OnSoundDataAvailable(object sender, DataAvailableEventArgs dataAvailableEventArgs)
         {
             int readCount;

KeyboardAudioVisualizer/AudioCapture/IAudioInput.cs

@@ -1,8 +1,10 @@
-namespace KeyboardAudioVisualizer.AudioCapture
+using System;
+
+namespace KeyboardAudioVisualizer.AudioCapture
 {
     public delegate void AudioData(float[] data, int offset, int count);
 
-    public interface IAudioInput
+    public interface IAudioInput : IDisposable
     {
         int SampleRate { get; }
 

KeyboardAudioVisualizer/AudioProcessing/AudioProcessor.cs

@@ -1,11 +1,12 @@
-using KeyboardAudioVisualizer.AudioCapture;
+using System;
+using KeyboardAudioVisualizer.AudioCapture;
 using KeyboardAudioVisualizer.AudioProcessing.Equalizer;
 using KeyboardAudioVisualizer.AudioProcessing.Spectrum;
 using KeyboardAudioVisualizer.AudioProcessing.VisualizationPRovider;
 
 namespace KeyboardAudioVisualizer.AudioProcessing
 {
-    public class AudioProcessor
+    public class AudioProcessor : IDisposable
     {
         #region Constants
 
@@ -72,6 +73,8 @@ namespace KeyboardAudioVisualizer.AudioProcessing
             return sampleSize;
         }
 
+        public void Dispose() => _audioInput.Dispose();
+
         #endregion
     }
 }