Update app.py

app.py

@@ -126,7 +126,9 @@ with demo:
   text = gr.Textbox()
   source_lang = gr.Dropdown(label="Source lang", choices=list(lang_id.keys()))
   b3 = gr.Button("Select lang")
-  b3.click(input = source_lang)
+  gr.Examples(
+                inputs=[
+                    model_dropdown])
   b1 = gr.Button("convert to text")
   b1.click(audio_a_text, inputs=audio, outputs=text)