diff --git a/sidecar/stream-audio.ts b/sidecar/stream-audio.ts
index 7ae4034..a5cbe6a 100644
--- a/sidecar/stream-audio.ts
+++ b/sidecar/stream-audio.ts
@@ -54,6 +54,13 @@ export async function streamAudioFile(
   }
   if (!s.isFile()) return new Response('Not a file', { status: 404 });
 
+  // TEMPORARY diagnostic (2026-08-29): iOS first-play issues ~28 range requests in 2 s where Android
+  // issues one. This prints each request range so we can see WHICH bytes AVPlayer asks for — small
+  // sequential chunks would mean a transport problem, scattered offsets a VBR duration scan.
+  console.log(
+    `[stream] ${new Date().toISOString().slice(11, 23)} ${rangeHeader ?? "FULL"} · ${relPath.slice(relPath.lastIndexOf("/") + 1)}`,
+  );
+
   const total = s.size;
   const ext = absPath.slice(absPath.lastIndexOf('.') + 1).toLowerCase();
   const contentType = CONTENT_TYPES[ext] ?? 'application/octet-stream';