diff --git a/CloudServer/server.js b/CloudServer/server.js
index 2df7821..9343134 100644
--- a/CloudServer/server.js
+++ b/CloudServer/server.js
@@ -1288,7 +1288,8 @@ function buildSequenceWavFile(seq) {
             try { fs.unlinkSync(outWavPath); } catch {}
         }, Math.max(10 * 60 * 1000, Math.ceil(durationSec * 2000)));
         return {
-            audioFormat: 'stream',
+            audioFormat: 'wav-stream-live',
+            sourcePath: outWavPath,
             streamUrl: getManagedMediaUrl('temp', fileName),
             durationSec
         };
@@ -1875,6 +1876,7 @@ function handleTrainArrival(ws, data) {
     if (built) {
         enqueueStationAudioTask(stationName, ws, {
             audioFormat: built.audioFormat,
+            sourcePath: built.sourcePath,
             streamUrl: built.streamUrl,
             durationSec: built.durationSec,
             priority: 1,
@@ -1923,6 +1925,7 @@ function handleTrainDeparture(ws, data) {
     if (built) {
         enqueueStationAudioTask(stationName, ws, {
             audioFormat: built.audioFormat,
+            sourcePath: built.sourcePath,
             streamUrl: built.streamUrl,
             durationSec: built.durationSec,
             priority: 1,