diff --git a/Kiva-MIDI/BASSMIDI.cs b/Kiva-MIDI/BASSMIDI.cs
index 0cbdefc..84dd6d2 100644
--- a/Kiva-MIDI/BASSMIDI.cs
+++ b/Kiva-MIDI/BASSMIDI.cs
@@ -28,21 +28,38 @@ public class BASSMIDI : ISampleSource
 
         static object sfLock = new object();
 
+        public static bool IsPreRender()
+        {
+            Settings s = new Settings();
+
+            if (s.General.SelectedAudioEngine != AudioEngine.PreRender)
+                return false;
+
+            return true;
+        }
+
         public static void InitBASS(WaveFormat format)
         {
             WaveFormatStatic = format;
-            Bass.BASS_Free();
+
+            if (!IsPreRender())
+                return;
+
             if (!Bass.BASS_Init(0, WaveFormatStatic.SampleRate, BASSInit.BASS_DEVICE_NOSPEAKER, IntPtr.Zero))
                 throw new Exception();
         }
 
-        public static void DisposeBASS()
+        public static void CloseBASS()
         {
-            Bass.BASS_Free();
+            if (!Bass.BASS_Free())
+                throw new Exception();
         }
 
         public BASSMIDI(int voices, bool nofx = true)
         {
+            if (!IsPreRender())
+                return;
+
             Handle = BassMidi.BASS_MIDI_StreamCreate(16,
                 BASSFlag.BASS_SAMPLE_FLOAT |
                 BASSFlag.BASS_STREAM_DECODE |
@@ -79,6 +96,9 @@ public static void FreeSoundfonts()
 
         public static void LoadSoundfonts(SoundfontData[] soundfonts)
         {
+            if (!IsPreRender())
+                return;
+
             lock (sfLock)
             {
                 FreeSoundfonts();
diff --git a/Kiva-MIDI/MIDIAudio.cs b/Kiva-MIDI/MIDIAudio.cs
index 493e62e..32cc3f4 100644
--- a/Kiva-MIDI/MIDIAudio.cs
+++ b/Kiva-MIDI/MIDIAudio.cs
@@ -125,11 +125,6 @@ public int SkippingVelocity
         AudioBufferStream audioStream;
         ISoundOut soundOut;
 
-        public static void Init()
-        {
-            BASSMIDI.InitBASS(format);
-        }
-
         private ISoundOut GetSoundOut()
         {
             if (WasapiOut.IsSupportedOnCurrentPlatform)
@@ -140,6 +135,7 @@ private ISoundOut GetSoundOut()
 
         public MIDIAudio(int bufferLength)
         {
+            BASSMIDI.InitBASS(format);
             AudioBuffer = new float[bufferLength * 2];
             audioStream = new AudioBufferStream(this);
             soundOut = GetSoundOut();
diff --git a/Kiva-MIDI/MIDIPreRenderPlayer.cs b/Kiva-MIDI/MIDIPreRenderPlayer.cs
index 8e566bb..61f494b 100644
--- a/Kiva-MIDI/MIDIPreRenderPlayer.cs
+++ b/Kiva-MIDI/MIDIPreRenderPlayer.cs
@@ -180,6 +180,7 @@ public void Dispose()
         {
             ma.Dispose();
             BASSMIDI.FreeSoundfonts();
+            BASSMIDI.CloseBASS();
             disposed = true;
             syncThread.GetAwaiter().GetResult();
             settings.Soundfonts.SoundfontsUpdated -= OnSoundfontsChanged;
diff --git a/Kiva-MIDI/Program.cs b/Kiva-MIDI/Program.cs
index 56ca684..87adf7c 100644
--- a/Kiva-MIDI/Program.cs
+++ b/Kiva-MIDI/Program.cs
@@ -25,8 +25,6 @@ static void Main(string[] args)
 #endif
             Directory.SetCurrentDirectory(Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName));
 
-            MIDIAudio.Init();
-
             var s = new Settings();
             s.InitSoundfontListner();
             if (s.EnableUpdates)
diff --git a/Kiva-MIDI/Settings/WinMMAudioSettings.xaml.cs b/Kiva-MIDI/Settings/WinMMAudioSettings.xaml.cs
index eb58ae9..ea55c9b 100644
--- a/Kiva-MIDI/Settings/WinMMAudioSettings.xaml.cs
+++ b/Kiva-MIDI/Settings/WinMMAudioSettings.xaml.cs
@@ -52,6 +52,10 @@ public WinMMAudioSettings()
                 MIDIOUTCAPS device;
                 WinMM.midiOutGetDevCaps(i, out device, (uint)Marshal.SizeOf(typeof(MIDIOUTCAPS)));
                 name = device.szPname;
+
+                if (name == "OmniMIDI")
+                    continue;
+
                 var item = new Grid()
                 {
                     Tag = new DeviceData() { id = i, name = name },