Update app.py

app.py

@@ -125,6 +125,8 @@ with demo:
   audio = gr.Audio(type="filepath", label = "Upload a file")
   text = gr.Textbox()
   source_lang = gr.selectbox(label="Source language", options=list(lang_id.keys()))
+  b3 = gr.Button("Select language")
+  b3.click(input = source_langauge)
   b1 = gr.Button("convert to text")
   b1.click(audio_a_text, inputs=audio, outputs=text)