diff --git a/ltu2_api_demo.py b/ltu2_api_demo.py
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+++ b/ltu2_api_demo.py
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+# -*- coding: utf-8 -*-
+# @Time    : 9/6/23 2:05 PM
+# @Author  : Yuan Gong
+# @Affiliation  : Massachusetts Institute of Technology
+# @Email   : yuangong@mit.edu
+# @File    : api_demo.py
+
+# method 1
+
+# import json
+# import gradio as gr
+# import requests
+# import os
+#
+# def is_file_larger_than_30mb(file_path):
+#     try:
+#         file_size = os.path.getsize(file_path)
+#         return file_size > (30 * 1024 * 1024)
+#     except FileNotFoundError:
+#         return False
+#     except PermissionError:
+#         return False
+#     except Exception as e:
+#         return False
+#
+# def upload_audio(audio_path):
+#     try:
+#         size = is_file_larger_than_30mb(audio_path)
+#         if size == True:
+#             return 'size'
+#         with open(audio_path, 'rb') as audio_file:
+#             response = requests.post('http://sls-titan-6.csail.mit.edu:8080/upload/', files={'audio_file': audio_file})
+#         if response.status_code == 200:
+#             return response.json()["path"]
+#     except:
+#         return None
+#
+# def predict(audio_path, question):
+#     upload_statues = upload_audio(audio_path)
+#     if upload_statues == None:
+#         return 'Please upload an audio file.'
+#     if upload_statues == 'size':
+#         return 'This demo does not support audio file size larger than 30MB.'
+#     if question == '':
+#         return 'Please ask a question.'
+#     print(audio_path, question)
+#     response = requests.put('http://sls-titan-6.csail.mit.edu:8080/items/0', json={
+#         'audio_path': audio_path, 'question': question
+#     })
+#     answer = json.loads(response.content)
+#     ans_str = answer['output']
+#     return ans_str
+#
+# ans = predict('./sample_audio.wav', 'What did you hear?')
+# print(ans)
+
+# # method 2
+
+from gradio_client import Client
+import time
+
+client = Client("https://yuangongfdu-ltu-2.hf.space/")
+
+for repeat in range(3):
+    result = client.predict(
+                    "./sample_audio.wav",
+                    "What can be inferred from the spoken text and sounds? Why?",	# str in 'Edit the textbox to ask your own questions!' Textbox component
+                    api_name="/predict"
+    )
+    print(result)
+    # please do add a sleep to avoid long queue, for longer audio, sleep needs to be longer
+    time.sleep(10)
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diff --git a/sample_audio.wav b/sample_audio.wav
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