diff --git a/Harmonia.Core/Engine/AudioPlaybackState.cs b/Harmonia.Core/Engine/AudioPlaybackState.cs
new file mode 100644
index 0000000..a203097
--- /dev/null
+++ b/Harmonia.Core/Engine/AudioPlaybackState.cs
@@ -0,0 +1,9 @@
+namespace Harmonia.Core.Engine;
+
+public enum AudioPlaybackState
+{
+    Stopped,
+    Playing,
+    Stalled,
+    Paused
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Engine/IAudioEngine.cs b/Harmonia.Core/Engine/IAudioEngine.cs
new file mode 100644
index 0000000..686a219
--- /dev/null
+++ b/Harmonia.Core/Engine/IAudioEngine.cs
@@ -0,0 +1,22 @@
+namespace Harmonia.Core.Engine;
+
+public interface IAudioEngine
+{
+    string[] SupportedFormats { get; }
+    string Source { get; }
+    TimeSpan Position { get; set; }
+    TimeSpan Length { get; }
+    float Volume { get; set; }
+    bool CanPause { get; }
+    bool IsMuted { get; set; }
+    AudioPlaybackState State { get; }
+
+    Task<bool> LoadAsync(string fileName);
+    void Play();
+    void Pause();
+    void Stop();
+
+    event EventHandler<PlaybackStoppedEventArgs> PlaybackStopped;
+    event EventHandler StreamFinished;
+    event EventHandler<PlaybackStateChangedEventArgs> StateChanged;
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Engine/PlaybackStateChangedEventArgs.cs b/Harmonia.Core/Engine/PlaybackStateChangedEventArgs.cs
new file mode 100644
index 0000000..91920ce
--- /dev/null
+++ b/Harmonia.Core/Engine/PlaybackStateChangedEventArgs.cs
@@ -0,0 +1,7 @@
+namespace Harmonia.Core.Engine;
+
+public class PlaybackStateChangedEventArgs(AudioPlaybackState oldState, AudioPlaybackState newState) : EventArgs
+{
+    public AudioPlaybackState OldState { get; } = oldState;
+    public AudioPlaybackState State { get; } = newState;
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Engine/PlaybackStoppedEventArgs.cs b/Harmonia.Core/Engine/PlaybackStoppedEventArgs.cs
new file mode 100644
index 0000000..262df2a
--- /dev/null
+++ b/Harmonia.Core/Engine/PlaybackStoppedEventArgs.cs
@@ -0,0 +1,6 @@
+namespace Harmonia.Core.Engine;
+
+public class PlaybackStoppedEventArgs(string message) : EventArgs
+{
+    public string Message { get; } = message;
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Harmonia.Core.csproj b/Harmonia.Core/Harmonia.Core.csproj
index 125f4c9..3afc37a 100644
--- a/Harmonia.Core/Harmonia.Core.csproj
+++ b/Harmonia.Core/Harmonia.Core.csproj
@@ -6,4 +6,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="TagLibSharp" Version="2.3.0" />
+  </ItemGroup>
+
 </Project>
diff --git a/Harmonia.Core/Playlists/IPlaylistManager.cs b/Harmonia.Core/Playlists/IPlaylistManager.cs
new file mode 100644
index 0000000..2d2f35e
--- /dev/null
+++ b/Harmonia.Core/Playlists/IPlaylistManager.cs
@@ -0,0 +1,13 @@
+namespace Harmonia.Core.Playlists;
+
+public interface IPlaylistManager
+{
+    Playlist? CurrentPlaylist { get; set; }
+
+    void AddPlaylist();
+    void RemovePlaylist(Playlist playlist);
+
+    event EventHandler? CurrentPlaylistChanged;
+    event EventHandler<PlaylistAddedEventArgs> PlaylistAdded;
+    event EventHandler<PlaylistRemovedEventArgs> PlaylistRemoved;
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Models/Playlist.cs b/Harmonia.Core/Playlists/Playlist.cs
similarity index 97%
rename from Harmonia.Core/Models/Playlist.cs
rename to Harmonia.Core/Playlists/Playlist.cs
index 28e4b7e..b6caf55 100644
--- a/Harmonia.Core/Models/Playlist.cs
+++ b/Harmonia.Core/Playlists/Playlist.cs
@@ -1,7 +1,7 @@
-using Harmonia.Core.Events;
-using Harmonia.Core.Extensions;
+using Harmonia.Core.Extensions;
+using Harmonia.Core.Models;
 
-namespace Harmonia.Core.Models;
+namespace Harmonia.Core.Playlists;
 
 public class Playlist
 {
diff --git a/Harmonia.Core/Playlists/PlaylistAddedEventArgs.cs b/Harmonia.Core/Playlists/PlaylistAddedEventArgs.cs
new file mode 100644
index 0000000..7e5930e
--- /dev/null
+++ b/Harmonia.Core/Playlists/PlaylistAddedEventArgs.cs
@@ -0,0 +1,6 @@
+namespace Harmonia.Core.Playlists;
+
+public class PlaylistAddedEventArgs(Playlist playlist) : EventArgs
+{
+    public readonly Playlist Playlist = playlist;
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Playlists/PlaylistManager.cs b/Harmonia.Core/Playlists/PlaylistManager.cs
new file mode 100644
index 0000000..b7dc6d6
--- /dev/null
+++ b/Harmonia.Core/Playlists/PlaylistManager.cs
@@ -0,0 +1,43 @@
+using Harmonia.Core.Data;
+
+namespace Harmonia.Core.Playlists;
+
+public class PlaylistManager(IRepository<Playlist> playlistRepository) : IPlaylistManager
+{
+    private Playlist? _currentPlaylist;
+    public Playlist? CurrentPlaylist
+    {
+        get
+        {
+            return _currentPlaylist;
+        }
+        set
+        {
+            _currentPlaylist = value;
+            CurrentPlaylistChanged?.Invoke(this, new());
+        }
+    }
+
+    public event EventHandler? CurrentPlaylistChanged;
+    public event EventHandler<PlaylistAddedEventArgs>? PlaylistAdded;
+    public event EventHandler<PlaylistRemovedEventArgs>? PlaylistRemoved;
+
+    public void AddPlaylist()
+    {
+        Playlist playlist = new()
+        {
+            Name = "New Playlist"
+        };
+
+        playlistRepository.Save(playlist);
+
+        PlaylistAdded?.Invoke(this, new(playlist));
+    }
+
+    public void RemovePlaylist(Playlist playlist)
+    {
+        playlistRepository.Delete(playlist);
+
+        PlaylistRemoved?.Invoke(this, new(playlist));
+    }
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Playlists/PlaylistRemovedEventArgs.cs b/Harmonia.Core/Playlists/PlaylistRemovedEventArgs.cs
new file mode 100644
index 0000000..8649626
--- /dev/null
+++ b/Harmonia.Core/Playlists/PlaylistRemovedEventArgs.cs
@@ -0,0 +1,6 @@
+namespace Harmonia.Core.Playlists;
+
+public class PlaylistRemovedEventArgs(Playlist playlist) : EventArgs
+{
+    public readonly Playlist Playlist = playlist;
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Data/PlaylistRepository.cs b/Harmonia.Core/Playlists/PlaylistRepository.cs
similarity index 89%
rename from Harmonia.Core/Data/PlaylistRepository.cs
rename to Harmonia.Core/Playlists/PlaylistRepository.cs
index d7402e6..359d891 100644
--- a/Harmonia.Core/Data/PlaylistRepository.cs
+++ b/Harmonia.Core/Playlists/PlaylistRepository.cs
@@ -1,6 +1,6 @@
-using Harmonia.Core.Models;
+using Harmonia.Core.Data;
 
-namespace Harmonia.Core.Data;
+namespace Harmonia.Core.Playlists;
 
 public class PlaylistRepository : JsonFileRepository<Playlist>
 {
diff --git a/Harmonia.Core/Models/PlaylistSong.cs b/Harmonia.Core/Playlists/PlaylistSong.cs
similarity index 67%
rename from Harmonia.Core/Models/PlaylistSong.cs
rename to Harmonia.Core/Playlists/PlaylistSong.cs
index 361db92..e18bf64 100644
--- a/Harmonia.Core/Models/PlaylistSong.cs
+++ b/Harmonia.Core/Playlists/PlaylistSong.cs
@@ -1,4 +1,6 @@
-namespace Harmonia.Core.Models;
+using Harmonia.Core.Models;
+
+namespace Harmonia.Core.Playlists;
 
 public class PlaylistSong(Song song)
 {
diff --git a/Harmonia.Core/Events/PlaylistUpdateAction.cs b/Harmonia.Core/Playlists/PlaylistUpdateAction.cs
similarity index 91%
rename from Harmonia.Core/Events/PlaylistUpdateAction.cs
rename to Harmonia.Core/Playlists/PlaylistUpdateAction.cs
index 695fd89..d192184 100644
--- a/Harmonia.Core/Events/PlaylistUpdateAction.cs
+++ b/Harmonia.Core/Playlists/PlaylistUpdateAction.cs
@@ -1,4 +1,4 @@
-namespace Harmonia.Core.Events;
+namespace Harmonia.Core.Playlists;
 
 public enum PlaylistUpdateAction
 {
diff --git a/Harmonia.Core/Events/PlaylistUpdatedEventArgs.cs b/Harmonia.Core/Playlists/PlaylistUpdatedEventArgs.cs
similarity index 83%
rename from Harmonia.Core/Events/PlaylistUpdatedEventArgs.cs
rename to Harmonia.Core/Playlists/PlaylistUpdatedEventArgs.cs
index 45e3fdb..ddbb1c1 100644
--- a/Harmonia.Core/Events/PlaylistUpdatedEventArgs.cs
+++ b/Harmonia.Core/Playlists/PlaylistUpdatedEventArgs.cs
@@ -1,6 +1,4 @@
-using Harmonia.Core.Models;
-
-namespace Harmonia.Core.Events;
+namespace Harmonia.Core.Playlists;
 
 public class PlaylistUpdatedEventArgs : EventArgs
 {
diff --git a/Harmonia.Core/Tags/ITagResolver.cs b/Harmonia.Core/Tags/ITagResolver.cs
new file mode 100644
index 0000000..6cc40ae
--- /dev/null
+++ b/Harmonia.Core/Tags/ITagResolver.cs
@@ -0,0 +1,6 @@
+namespace Harmonia.Core.Tags;
+
+public interface ITagResolver
+{
+    SongTagInfo GetSongTagInfo(string fileName);
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Tags/PictureTag.cs b/Harmonia.Core/Tags/PictureTag.cs
new file mode 100644
index 0000000..ced44dc
--- /dev/null
+++ b/Harmonia.Core/Tags/PictureTag.cs
@@ -0,0 +1,8 @@
+namespace Harmonia.Core.Tags;
+
+public class PictureTag
+{
+    public required string MimeType;
+    public required PictureType PictureType;
+    public required byte[] Data;
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Tags/PictureType.cs b/Harmonia.Core/Tags/PictureType.cs
new file mode 100644
index 0000000..63e19cf
--- /dev/null
+++ b/Harmonia.Core/Tags/PictureType.cs
@@ -0,0 +1,96 @@
+namespace Harmonia.Core.Tags;
+
+//
+// Summary:
+//     Picture Types.
+public enum PictureType
+{
+    //
+    // Summary:
+    //     Other.
+    Other = 0,
+    //
+    // Summary:
+    //     File Icon.
+    FileIcon = 1,
+    //
+    // Summary:
+    //     Other File Icon.
+    OtherFileIcon = 2,
+    //
+    // Summary:
+    //     Front Cover.
+    FrontCover = 3,
+    //
+    // Summary:
+    //     Back Cover.
+    BackCover = 4,
+    //
+    // Summary:
+    //     Leaflet Page.
+    LeafletPage = 5,
+    //
+    // Summary:
+    //     Media.
+    Media = 6,
+    //
+    // Summary:
+    //     Soloist.
+    Soloist = 7,
+    //
+    // Summary:
+    //     Artist.
+    Artist = 8,
+    //
+    // Summary:
+    //     Conductor.
+    Conductor = 9,
+    //
+    // Summary:
+    //     Band.
+    Band = 10,
+    //
+    // Summary:
+    //     Composer.
+    Composer = 11,
+    //
+    // Summary:
+    //     Lyricist.
+    Lyricist = 12,
+    //
+    // Summary:
+    //     Recording Location.
+    RecordingLocation = 13,
+    //
+    // Summary:
+    //     During Recording.
+    DuringRecording = 14,
+    //
+    // Summary:
+    //     During Performance.
+    DuringPerformance = 15,
+    //
+    // Summary:
+    //     Movie.
+    Movie = 16,
+    //
+    // Summary:
+    //     A Bright Coloured Fish.
+    ABrightColouredFish = 17,
+    //
+    // Summary:
+    //     Illustration.
+    Illustration = 18,
+    //
+    // Summary:
+    //     Band Logo.
+    BandLogo = 19,
+    //
+    // Summary:
+    //     Publisher Logo.
+    PublisherLogo = 20,
+    //
+    // Summary:
+    //      Not A Picture
+    NotAPicture = 255
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Tags/SongTagInfo.cs b/Harmonia.Core/Tags/SongTagInfo.cs
new file mode 100644
index 0000000..2d79b40
--- /dev/null
+++ b/Harmonia.Core/Tags/SongTagInfo.cs
@@ -0,0 +1,18 @@
+namespace Harmonia.Core.Tags;
+
+public class SongTagInfo
+{
+    public string? Title { get; set; }
+    public string? Album { get; set; }
+    public List<string> Artists { get; set; } = [];
+    public List<string> AlbumArtists { get; set; } = [];
+    public int? DiscNumber { get; set; }
+    public int? TrackNumber { get; set; }
+    public TimeSpan Length { get; set; } = TimeSpan.Zero;
+    public int? Year { get; set; }
+    public string? Genre { get; set; }
+    public int BitRate { get; set; }
+    public int SampleRate { get; set; }
+    public List<PictureTag> Pictures { get; set; } = [];
+    public Dictionary<string, string> Other { get; set; } = [];
+}
\ No newline at end of file
diff --git a/Harmonia.Core/Tags/TagLibTagResolver.cs b/Harmonia.Core/Tags/TagLibTagResolver.cs
new file mode 100644
index 0000000..053008b
--- /dev/null
+++ b/Harmonia.Core/Tags/TagLibTagResolver.cs
@@ -0,0 +1,54 @@
+namespace Harmonia.Core.Tags;
+
+public class TagLibTagResolver : ITagResolver
+{
+    public SongTagInfo GetSongTagInfo(string fileName)
+    {
+        var songTagInfo = new SongTagInfo();
+
+        using (var tagFile = TagLib.File.Create(fileName))
+        {
+            int? discNumber = null;
+            int? trackNumber = null;
+            int? year = null;
+
+            if (tagFile.Tag.Track > 0)
+                trackNumber = Convert.ToInt32(tagFile.Tag.Track);
+
+            if (tagFile.Tag.Disc > 0)
+                discNumber = Convert.ToInt32(tagFile.Tag.Disc);
+
+            if (tagFile.Tag.Year > 0)
+                year = Convert.ToInt32(tagFile.Tag.Year);
+
+            songTagInfo.Title = tagFile.Tag.Title;
+            songTagInfo.Album = tagFile.Tag.Album;
+            songTagInfo.Artists = tagFile.Tag.Performers.Select(x => x.Trim()).ToList();
+            songTagInfo.AlbumArtists = tagFile.Tag.AlbumArtists.Select(x => x.Trim()).ToList();
+            songTagInfo.DiscNumber = discNumber;
+            songTagInfo.TrackNumber = trackNumber;
+            songTagInfo.Length = tagFile.Properties.Duration;
+            songTagInfo.Year = year;
+            songTagInfo.Genre = tagFile.Tag.JoinedGenres;
+            songTagInfo.BitRate = tagFile.Properties.AudioBitrate;
+            songTagInfo.SampleRate = tagFile.Properties.AudioSampleRate;
+
+            foreach (var picture in tagFile.Tag.Pictures)
+            {
+                if (picture.Type == TagLib.PictureType.NotAPicture)
+                    continue;
+
+                var pictureTag = new PictureTag()
+                {
+                    MimeType = picture.MimeType,
+                    PictureType = (PictureType)picture.Type,
+                    Data = picture.Data.Data
+                };
+
+                songTagInfo.Pictures.Add(pictureTag);
+            };
+        }
+
+        return songTagInfo;
+    }
+}
\ No newline at end of file
diff --git a/Harmonia.Tests/PlaylistTests.cs b/Harmonia.Tests/PlaylistTests.cs
index d1bd254..10a3957 100644
--- a/Harmonia.Tests/PlaylistTests.cs
+++ b/Harmonia.Tests/PlaylistTests.cs
@@ -1,4 +1,6 @@
 using Harmonia.Core.Models;
+using Harmonia.Core.Playlists;
+using NSubstitute;
 using Shouldly;
 using System.ComponentModel;
 
@@ -123,4 +125,10 @@ public class PlaylistTests
 
         playlist.Songs.Count.ShouldBe(3);
     }
+
+    //public void Get_Playlists()
+    //{
+    //    //PlaylistRepository playlistRepository = new();
+    //    //playlistRepository.Get().Returns()
+    //}
 }
\ No newline at end of file