diff --git a/web/ascoltami/PlayerState.ts b/web/ascoltami/PlayerState.ts
new file mode 100644
--- /dev/null
+++ b/web/ascoltami/PlayerState.ts
@@ -0,0 +1,10 @@
+import { NamedNode } from "n3";
+
+export interface PlayerState {
+  duration: number | null;
+  endOfSong: boolean | null;
+  pausedSongTime: number | null;
+  playing: boolean | null;
+  song: NamedNode<string> | null;
+  wallStartTime: number | null;
+}