diff --git a/packages/webamp/demo/js/mediaSession.ts b/packages/webamp/demo/js/mediaSession.ts
index f18d2840..2cb135de 100644
--- a/packages/webamp/demo/js/mediaSession.ts
+++ b/packages/webamp/demo/js/mediaSession.ts
@@ -10,11 +10,10 @@ export default function enableMediaSession(webamp: WebampLazy) {
       const {
         metaData: { title, artist, album, albumArtUrl },
       } = track;
-      // @ts-ignore TypeScript does not know about the Media Session API: https://github.com/Microsoft/TypeScript/issues/19473
       navigator.mediaSession.metadata = new MediaMetadata({
-        title,
-        artist,
-        album,
+        title: title ?? undefined,
+        artist: artist ?? undefined,
+        album: album ?? undefined,
         artwork: albumArtUrl
           ? [
               {
diff --git a/packages/webamp/js/marqueeUtils.tsx b/packages/webamp/js/marqueeUtils.tsx
index a2cbebe3..446a4d7e 100644
--- a/packages/webamp/js/marqueeUtils.tsx
+++ b/packages/webamp/js/marqueeUtils.tsx
@@ -31,7 +31,7 @@ const formatHz = (hz: number): string =>
   hz < 1000 ? `${hz}HZ` : `${hz / 1000}KHZ`;
 
 // Format a number as a string, ensuring it has a + or - sign
-const ensureSign = (num: number | string): string =>
+const ensureSign = (num: number): string =>
   num > 0 ? `+${num}` : num.toString();
 
 // Round to 1 and exactly 1 decimal point
@@ -41,5 +41,5 @@ const roundToTenths = (num: number): string =>
 export const getEqText = (band: Slider, level: number): string => {
   const db = roundToTenths(((level - 50) / 50) * 12);
   const label = band === "preamp" ? "Preamp" : formatHz(band);
-  return `EQ: ${label} ${ensureSign(db)} DB`;
+  return `EQ: ${label} ${ensureSign(Number(db))} DB`;
 };