fix variable name bug

app.py

@@ -153,7 +153,7 @@ def process_audio_pipeline(
         if not audio_file:
             return "❌ No audio file provided", "", "", None, ""
 
-        logger.info(f"Starting processing for: {audio_file} using {asr_model} model")
+        logger.info(f"Starting processing for: {audio_file} using whisper-medium model")
         logger.info(f"Audio file exists: {os.path.exists(audio_file) if audio_file else 'N/A'}")
 
         # Create audio upload DTO
@@ -168,7 +168,7 @@ def process_audio_pipeline(
         # Create processing request
         request = ProcessingRequestDto(
             audio=audio_upload,
-            asr_model=asr_model,  # This will use the default from config if None
+            asr_model="whisper-medium",  # This will use the default from config if None
             target_language=target_language,
             voice=voice,
             speed=speed,
@@ -185,7 +185,7 @@ def process_audio_pipeline(
             # Prepare processing details
             details = {
                 "processing_time": f"{result.processing_time:.2f}s",
-                "asr_model": asr_model,
+                "asr_model": "whisper-medium",
                 "target_language": target_language,
                 "voice": voice,
                 "speed": speed