diff --git a/specs/components/supplement/types.d.ts b/specs/components/supplement/types.d.ts
index c73bd007..01812c6e 100644
--- a/specs/components/supplement/types.d.ts
+++ b/specs/components/supplement/types.d.ts
@@ -14,6 +14,7 @@ export type ScrobbleActions = {
   /**
    * @param {Track} track
    * @param {number} startedAt Unix timestamp in milliseconds
+   * @param {{ duration?: number }} [options] duration in milliseconds
    */
-  scrobble(track: Track, startedAt: number): Promise<unknown>;
+  scrobble(track: Track, startedAt: number, options?: { duration?: number }): Promise<unknown>;
 };
diff --git a/src/components/configurator/scrobbles/element.js b/src/components/configurator/scrobbles/element.js
index a59edd88..10aad871 100644
--- a/src/components/configurator/scrobbles/element.js
+++ b/src/components/configurator/scrobbles/element.js
@@ -29,10 +29,11 @@ class ScrobblesConfigurator extends DiffuseElement {
   /**
    * @param {Track} track
    * @param {number} startedAt Unix timestamp in milliseconds
+   * @param {{ duration?: number }} [options] duration in milliseconds
    */
-  async scrobble(track, startedAt) {
+  async scrobble(track, startedAt, options) {
     return await Promise.all(
-      this.#activeScrobblers().map((s) => s.scrobble(track, startedAt)),
+      this.#activeScrobblers().map((s) => s.scrobble(track, startedAt, options)),
     );
   }
 
diff --git a/src/components/orchestrator/scrobble-audio/element.js b/src/components/orchestrator/scrobble-audio/element.js
index bc710b54..95159758 100644
--- a/src/components/orchestrator/scrobble-audio/element.js
+++ b/src/components/orchestrator/scrobble-audio/element.js
@@ -204,7 +204,7 @@ class ScrobbleAudioOrchestrator extends BroadcastableDiffuseElement {
     const startedAt = this.#startedAt;
 
     try {
-      await this.scrobble?.scrobble(track, startedAt);
+      await this.scrobble?.scrobble(track, startedAt, { duration: Math.round(durationSec * 1000) });
     } catch (err) {
       console.warn("Scrobble failed", err);
       this.#scrobbled = false;
diff --git a/src/components/supplement/last.fm/element.js b/src/components/supplement/last.fm/element.js
index 6823ee98..0a7d7eb8 100644
--- a/src/components/supplement/last.fm/element.js
+++ b/src/components/supplement/last.fm/element.js
@@ -188,8 +188,9 @@ class LastFmScrobbler extends BroadcastableDiffuseElement {
   /**
    * @param {Track} track
    * @param {number} startedAt Unix timestamp in milliseconds
+   * @param {{ duration?: number }} [_options] duration in milliseconds
    */
-  async scrobble(track, startedAt) {
+  async scrobble(track, startedAt, _options) {
     const tags = track.tags ?? {};
     /** @type {Record<string, string>} */
     const params = {
diff --git a/src/components/supplement/listenbrainz/element.js b/src/components/supplement/listenbrainz/element.js
index b7a30e14..72e6c2c2 100644
--- a/src/components/supplement/listenbrainz/element.js
+++ b/src/components/supplement/listenbrainz/element.js
@@ -130,8 +130,9 @@ class ListenBrainzScrobbler extends BroadcastableDiffuseElement {
   /**
    * @param {Track} track
    * @param {number} startedAt Unix timestamp in milliseconds
+   * @param {{ duration?: number }} [_options] duration in milliseconds
    */
-  async scrobble(track, startedAt) {
+  async scrobble(track, startedAt, _options) {
     return this.#submit("single", [
       {
         listened_at: Math.floor(startedAt / 1000),
diff --git a/src/components/supplement/rocksky/element.js b/src/components/supplement/rocksky/element.js
index a6a88192..a8de00f8 100644
--- a/src/components/supplement/rocksky/element.js
+++ b/src/components/supplement/rocksky/element.js
@@ -169,8 +169,9 @@ class RockskyScrobbler extends BroadcastableDiffuseElement {
   /**
    * @param {Track} track
    * @param {number} startedAt Unix timestamp in milliseconds
+   * @param {{ duration?: number }} [options] duration in milliseconds
    */
-  async scrobble(track, startedAt) {
+  async scrobble(track, startedAt, { duration: durationMs } = {}) {
     if (!this.#connected.value) return;
 
     const did = localStorage.getItem(DID_STORAGE_KEY);
@@ -180,31 +181,25 @@ class RockskyScrobbler extends BroadcastableDiffuseElement {
     const agent = new OAuthUserAgent(session);
 
     const tags = track.tags ?? {};
+    const duration = track.stats?.duration ?? durationMs;
 
-    // All five fields are required by the app.rocksky.scrobble lexicon.
-    if (
-      !tags.title ||
-      !tags.artist ||
-      !tags.album ||
-      !tags.albumartist ||
-      track.stats?.duration == null
-    ) return;
+    // duration has no meaningful fallback value; skip rather than create an invalid record
+    if (duration == null) return;
 
     /** @type {Record<string, unknown>} */
     const record = {
       $type: "app.rocksky.scrobble",
-      title: tags.title,
-      artist: tags.artist,
-      album: tags.album,
-      albumArtist: tags.albumartist,
-      duration: track.stats.duration,
+      createdAt: new Date(startedAt).toISOString(),
+      title: tags.title || "Unknown",
+      artist: tags.artist || "Unknown",
+      album: tags.album || "Unknown",
+      albumArtist: tags.albumartist || tags.artist || "Unknown",
+      duration,
     };
 
     if (tags.track?.no != null) record.trackNumber = tags.track.no;
     if (tags.disc?.no != null) record.discNumber = tags.disc.no;
 
-    record.createdAt = new Date(startedAt).toISOString();
-
     const response = await agent.handle("/xrpc/com.atproto.repo.putRecord", {
       method: "POST",
       headers: { "Content-Type": "application/json" },