app.py

import gradio as gr

def toggle(choice):
    if choice == "mic":
        return gr.update(visible=True), gr.update(visible=False)
    else:
        return gr.update(visible=False), gr.update(visible=True)


with gr.Blocks() as demo:
    with gr.Row():
        with gr.Column():
            r = gr.Radio(["mic", "file"], value="mic", label="How would you like to upload your audio?")
            m = gr.Mic(label="Input")
            f = gr.Audio(type="filepath", label="Input", visible=False)
        with gr.Column():
            output = gr.Audio(label="Output")
    
    r.change(toggle, r, [m, f])
    m.change(lambda x:x, m, output)
    f.change(lambda x:x, f, output)    

demo.launch()