diff --git a/MusicKit.d.ts b/MusicKit.d.ts
index 8198e9e..cd64a11 100644
--- a/MusicKit.d.ts
+++ b/MusicKit.d.ts
@@ -42,9 +42,22 @@ export interface MusicKitConfiguration {
 }
 
 export interface MusicKitObject {
+    /**
+     * Configure MusicKit
+     * @param config - Configuration of MusicKit
+     */
     'configure': ( config: MusicKitConfiguration ) => Promise<MusicKitInstance>;
 
+    /**
+     * Retrieve the MusicKit instance after configuring it.
+     */
     'getInstance': () => MusicKitInstance;
 
+    /**
+     * Format an artwork object to get the formatted URL.
+     * @param artwork - The artwork object as retrieved from the API
+     * @param width - The desired width of the artwork
+     * @param height - The desired height of the artwork
+     */
     'formatArtworkURL': ( artwork: Artwork, width: number, height: number ) => string;
 }
diff --git a/MusicKitAPI.d.ts b/MusicKitAPI.d.ts
index 9866402..9c5baff 100644
--- a/MusicKitAPI.d.ts
+++ b/MusicKitAPI.d.ts
@@ -1,4 +1,12 @@
 export interface MusicKitAPI {
+    /**
+     * This is the primary mean of accessing the Apple Music API.
+     * @see https://js-cdn.music.apple.com/musickit/v3/docs/index.html?path=/docs/reference-javascript-api--page
+     * @param path - The Apple Music API path to use
+     * @param params - The parameters to substitute in the path (params use Mustache syntax)
+     * @param options - Extra options to pass directly to the underlying fetch call.
+     * @returns The data in an object. The type varies across paths.
+     */
     'music': (
         path: string,
         params: {
diff --git a/MusicKitInstance.d.ts b/MusicKitInstance.d.ts
index cf1c588..971f989 100644
--- a/MusicKitInstance.d.ts
+++ b/MusicKitInstance.d.ts
@@ -11,15 +11,39 @@ import type {
 export type MediaItem = object;
 
 export interface Queue {
+    /**
+     * The item at the `position` within `items` array
+     */
     'currentItem': MediaItem;
+    /**
+     * True if the `length` of the queue is `0`
+     */
     'isEmpty': boolean;
+    /**
+     * Array of `MediaItem`s in queue
+     */
     'items': MediaItem[];
+    /**
+     * The number of `MediaItem`s in the queu
+     */
     'length': number;
+    /**
+     * The next item after the `currentItem` in the queue
+     */
     'nextPlayableItem': MediaItem;
+    /**
+     * The current index of the queue
+     */
     'position': number;
+    /**
+     * The previous item after the `currentItem` in the queue
+     */
     'previousPlayableItem': MediaItem;
 }
 
+/**
+ * Used to set what is to be played
+ */
 export interface QueueOptions {
     'album'?: string;
     'albums'?: string[];
@@ -29,6 +53,18 @@ export interface QueueOptions {
     'playlists'?: string[];
     'song'?: string;
     'songs'?: string[];
+    /**
+     * Set the repeat mode when setting the queue
+     */
+    'repeatMode'?: PlayerRepeatMode;
+    /**
+     * Whether or not to start playing
+     */
+    'startPlaying'?: boolean;
+    /**
+     * The number of seconds to seek to in the current item
+     */
+    'startTime'?: number;
 }
 
 export interface SeekSeconds {
@@ -37,52 +73,207 @@ export interface SeekSeconds {
 }
 
 export interface MusicKitInstance {
+    /**
+     * Access the Apple Music API
+     */
     'api': Readonly<MusicKitAPI>;
+    /**
+     * The current bitrate
+     */
     'bitrate': Readonly<PlaybackBitrate>;
+    /**
+     * The duration of the `nowPlayingItem`, in seconds
+     */
     'currentPlaybackDuration': Readonly<number>;
+    /**
+     * Percentage of playback completion of `nowPlayingItem`, between 0 and 1
+     */
     'currentPlaybackProgress': Readonly<number>;
+    /**
+     * The playhead position for the `nowPlayingItem`, in seconds
+     */
     'currentPlaybackTime': Readonly<number>;
+    /**
+     * The remaining playback time for the `nowPlayingItem`, in seconds
+     */
     'currentPlaybackTimeRemaining': Readonly<number>;
+    /**
+     * Set to true if user successfully signed in and authorized application via `authorize`
+     */
     'isAuthorized': Readonly<boolean>;
+    /**
+     * True if audio is currently playing
+     */
     'isPlaying': Readonly<boolean>;
+    /**
+     * The current MediaItem that is playing
+     */
     'nowPlayingItem': Readonly<MediaItem>;
+    /**
+     * The index in the queue of the `nowPlayingItem`
+     */
     'nowPlayingItemIndex': Readonly<number>;
+    /**
+     * The speed of playback, default is 1.0
+     */
     'playbackRate': Readonly<number>;
+    /**
+     * The state of playback, for more information.
+     */
     'playbackState': Readonly<PlaybackStates>;
+    /**
+     * If a user is not subscribed to Apple Music
+     */
     'previewOnly': Readonly<boolean>;
+    /**
+     * The current playback queue
+     */
     'queue': Readonly<Queue>;
+    /**
+     * True if the playback queue is empty
+     */
     'queueIsEmpty': Readonly<boolean>;
-    'repeatMode': Readonly<PlayerRepeatMode>;
-    'seekSeconds': Readonly<SeekSeconds | undefined>;
-    'shuffleMode': Readonly<PlayerShuffleMode>;
+    /**
+     * Repeat mode for the player. Set here to control mode
+     */
+    'repeatMode': PlayerRepeatMode;
+    /**
+     * Used to configure seek behaviour, in seconds
+     */
+    'seekSeconds': SeekSeconds | undefined;
+    /**
+     * Control the shuffle mode for the player
+     */
+    'shuffleMode': PlayerShuffleMode;
+    /**
+     * The id of the authorized user's storefront
+     */
     'storefrontCountryCode': Readonly<string>;
+    /**
+     * The storefrontId as configured for this `MusicKitInstance`
+     */
     'storefrontId': Readonly<string>;
-    'videoContainerElement': Readonly<HTMLVideoElement | undefined>;
-    'volume': Readonly<number>;
+    /**
+     * Set this to allow for playing music videos in the specified element.
+     */
+    'videoContainerElement': HTMLVideoElement | undefined;
+    /**
+     * The volume of the `HTMLMediaElement`, between 0 and 1
+     */
+    'volume': number;
+    /**
+     * Listen to an event on the `MusicKitInstance`
+     * @param name - The Event name, see https://js-cdn.music.apple.com/musickit/v3/docs/index.html?path=/story/reference-javascript-events--page
+     * @param callback - a callable function, whose arguments depend on the event listened to
+     * @param options - Any further options (currently only 'once', which, if set to true, removes the listener after it was triggered once)
+     */
     'addEventListener': ( name: string, callback: CallableFunction, options: {
         'once': boolean
     } ) => void;
+    /**
+     * Authorize a user
+     * @returns Promise resolving to string representing user, or if authorization failed, undefined
+     */
     'authorize': () => Promise<string | void>;
+    /**
+     * Play `MediaItem` at specified index in Queue
+     * @param index - The index to play at
+     */
     'changeToMediaAtIndex': ( index: number ) => Promise<void>;
+    /**
+     * Change to a `MediaItem` or `string` representation of one instead of index
+     * @param descriptor - The item
+     */
     'changeToMediaItem': ( descriptor: MediaItem | string ) => Promise<void>;
+    /**
+     * Change the user's storefront to `storefrontId``
+     * @param storefrontId - The storefront to change to
+     */
     'changeUserStorefront': ( storefrontId: string ) => Promise<void>;
+    /**
+     * Clears the queue
+     */
     'clearQueue': () => Promise<Queue>;
+    /**
+     * Close full-screen element, when applicable
+     */
     'exitFullscreen': () => void;
+    /**
+     * Sets `volume` to `0`, previous value is stored
+     */
     'mute': () => void;
+    /**
+     * Pause playback
+     */
     'pause': () => void;
+    /**
+     * Starts playback of `nowPlayingItem`
+     */
     'play': () => void;
+    /**
+     * Inserts the `MediaItem`(s) defined by `QueueOptions` at the position indicated in the current queue.
+     * @param position - The index at which to insert
+     * @param options - What to add to the queue
+     */
     'playAt': ( position: number, options: QueueOptions ) => Promise<Queue | void>;
+    /**
+     * Inserts the item(s) after the last item in the current queue
+     * @param options - What to add to the queue
+     */
     'playLater': ( options: QueueOptions ) => Promise<Queue | void>;
-    'playNext': ( options: QueueOptions, clear: boolean ) => Promise<Queue | void>;
+    /**
+     * Inserts the item(s) after the `nowPlayingItem`
+     * @param options - What to add to the queue
+     * @param clear - Whether or not to clear the queue again
+     */
+    'playNext': ( options: QueueOptions, clear?: boolean ) => Promise<Queue | void>;
+    /**
+     * Remove the event listener again
+     * @param name - The name of the event to remove for
+     * @param callback - The used callback function on addEventListener
+     */
     'removeEventListener': ( name: string, callback: CallableFunction ) => void;
-    'requestFullscreen': () => void;
+    /**
+     * Make element full-screen
+     * @param element - The element to make full-screen
+     */
+    'requestFullscreen': ( element: HTMLElement ) => void;
+    /**
+     * Seeks back `seekSeconds.BACK` seconds
+     */
     'seekBackward': () => Promise<void>;
+    /**
+     * Seeks forward `seekSeconds.BACK` seconds
+     */
     'seekForward': () => Promise<void>;
+    /**
+     * Seek to a specific time in the song
+     * @param time - the time in seconds to move to
+     */
     'seekToTime': ( time: number ) => Promise<void>;
+    /**
+     * Set items for the playback queue
+     * @param options - Description of what is to be added to the queue
+     */
     'setQueue': ( options: QueueOptions ) => Promise<Queue | void>;
+    /**
+     * Skip to next song in queue
+     */
     'skipToNextItem': () => Promise<void>;
+    /**
+     * Skip to previous song in queue
+     */
     'skipToPreviousItem': () => Promise<void>;
+    /**
+     * Stops the `nowPlayingItem`
+     */
     'stop': () => void;
+    /**
+     * Unauthorizes the user from the application
+     */
     'unauthorize': () => Promise<void>;
+    /**
+     * Unmute playback volume, setting it to value before muting
+     */
     'unmute': () => void;
 }