| `player_type` | `'mpris'` or `'mpd'` | `mpris` | Whether to connect to MPRIS players or an MPD server. |
| `format` | `string` | `{title} / {artist}` | Format string for the widget. More info below. |
| `truncate` | `'start'` or `'middle'` or `'end'` or `Map` | `null` | The location of the ellipses and where to truncate text from. Leave null to avoid truncating. Use the long-hand `Map` version if specifying a length. |
| `truncate.mode` | `'start'` or `'middle'` or `'end'` | `null` | The location of the ellipses and where to truncate text from. Leave null to avoid truncating. |
| `truncate.length` | `integer` | `null` | The fixed width (in chars) of the widget. Leave blank to let GTK automatically handle. |
| `truncate.max_length` | `integer` | `null` | The maximum number of characters before truncating. Leave blank to let GTK automatically handle. |
| `icons.play` | `string` or [image](images) | `` | Icon to show when playing. |
| `icons.pause` | `string` or [image](images) | `` | Icon to show when paused. |
| `icons.prev` | `string` or [image](images) | `玲` | Icon to show on previous button. |
| `icons.next` | `string` or [image](images) | `怜` | Icon to show on next button. |
| `icons.volume` | `string` or [image](images) | `墳` | Icon to show under popup volume slider. |
| `icons.track` | `string` or [image](images) | `` | Icon to show next to track title. |
| `icons.album` | `string` or [image](images) | `` | Icon to show next to album name. |
| `icons.artist` | `string` or [image](images) | `ﴁ` | Icon to show next to artist name. |
| `show_status_icon` | `boolean` | `true` | Whether to show the play/pause icon on the widget. |
| `icon_size` | `integer` | `32` | Size to render icon at (image icons only). |
| `cover_image_size` | `integer` | `128` | Size to render album art image at inside popup. |
| `host` | `string` | `localhost:6600` | [MPD Only] TCP or Unix socket for the MPD server. |
| `music_dir` | `string` | `$HOME/Music` | [MPD Only] Path to MPD server's music directory on disc. Required for album art. |