change base64 type

app.py

@@ -16,12 +16,14 @@ async def process_audio_stream(audio_path, max_tokens):
         # Read audio file and convert to base64 bytes
         with open(audio_path, 'rb') as f:
             audio_bytes = f.read()
-            base64_bytes = base64.b64encode(audio_bytes)  # base64 encoded bytes
+            base64_bytes = base64.b64encode(audio_bytes)
+            # Convert to string for writing to text file
+            base64_string = base64_bytes.decode('utf-8')
             
         # Connect to WebSocket
         async with websockets.connect('ws://nexa-omni.nexa4ai.com/ws/process-audio/') as websocket:
             # Send binary base64 audio data
-            await websocket.send(base64_bytes)  # Send as raw bytes
+            await websocket.send(base64_string)  # Send as raw bytes
             
             # Send parameters as JSON string
             await websocket.send(json.dumps({