diff --git a/frontend/src/components/Transport/TransportControls.tsx b/frontend/src/components/Transport/TransportControls.tsx
index aede9a3..46379c8 100644
--- a/frontend/src/components/Transport/TransportControls.tsx
+++ b/frontend/src/components/Transport/TransportControls.tsx
@@ -247,7 +247,7 @@ export function TransportControls() {
           )}
           <input
             type="file"
-            accept=".mid,.midi,.xml,.mxl,.pdf,.mp3,.wav,.m4a,.ogg,.flac,.aac"
+            accept=".mid,.midi,.xml,.musicxml,.mxl,.pdf,.mp3,.wav,.m4a,.ogg,.flac,.aac"
             className="hidden"
             onChange={(e) => {
               const f = e.target.files?.[0];
diff --git a/frontend/src/store/useAppStore.ts b/frontend/src/store/useAppStore.ts
index 8c832d3..382c08b 100644
--- a/frontend/src/store/useAppStore.ts
+++ b/frontend/src/store/useAppStore.ts
@@ -313,7 +313,7 @@ export const useAppStore = create<AppState>((set, get) => {
       try {
         const id = crypto.randomUUID();
         // M4 - strip path separators, control chars; cap length
-        const rawTitle = file.name.replace(/\.(xml|mxl)$/i, "");
+        const rawTitle = file.name.replace(/\.(xml|musicxml|mxl)$/i, "");
         const title = rawTitle.replace(/[\x00-\x1f\x7f/\\]/g, "").slice(0, 200) || "Untitled";
         const xmlBytes = await file.arrayBuffer();
 
diff --git a/frontend/src/views/PracticeView.tsx b/frontend/src/views/PracticeView.tsx
index 12b1501..6a288c2 100644
--- a/frontend/src/views/PracticeView.tsx
+++ b/frontend/src/views/PracticeView.tsx
@@ -116,7 +116,7 @@ export function PracticeView() {
   const loadFile = useCallback(
     (file: File) => {
       if (file.name.match(/\.midi?$/i)) loadMidiFile(file);
-      else if (file.name.match(/\.(xml|mxl)$/i)) loadMusicXmlFile(file);
+      else if (file.name.match(/\.(xml|musicxml|mxl)$/i)) loadMusicXmlFile(file);
       else if (file.name.match(/\.pdf$/i)) loadPdfFile(file);
       else if (file.name.match(/\.(mp3|wav|m4a|ogg|flac|aac)$/i)) loadAudioFile(file);
     },
@@ -424,7 +424,7 @@ function EmptyState({ onImport }: { onImport: (file: File) => void }) {
       <input
         ref={fileInputRef}
         type="file"
-        accept=".mid,.midi,.xml,.mxl,.pdf,.mp3,.wav,.m4a,.ogg,.flac,.aac"
+        accept=".mid,.midi,.xml,.musicxml,.mxl,.pdf,.mp3,.wav,.m4a,.ogg,.flac,.aac"
         className="hidden"
         onChange={(e) => {
           const f = e.target.files?.[0];