app.py

#!/usr/bin/env python

import gradio as gr

with gr.Blocks() as demo:
    audio = gr.Audio()
    btn = gr.Button()
    audio2 = gr.Audio()
    gr.Examples(examples=["sample.mp3"], inputs=audio)
    btn.click(fn=lambda x: x, inputs=audio, outputs=audio2)
demo.queue().launch()