app.py

import gradio as gr
from TTS.api import TTS

def greet(source, target, choices_s):
    if choices_s == "freevc24":
        tts = TTS(model_name="voice_conversion_models/multilingual/vctk/freevc24", gpu=False)
    elif choices_s == "knnvc":
        tts = TTS(model_name="voice_conversion_models/multilingual/multi-dataset/knnvc", gpu=False)
    elif choices_s == "openvoice_v1":
        tts = TTS(model_name="voice_conversion_models/multilingual/multi-dataset/openvoice_v1", gpu=False)
    elif choices_s == "openvoice_v2":
        tts = TTS(model_name="voice_conversion_models/multilingual/multi-dataset/openvoice_v2", gpu=False)
    
    tts.voice_conversion_to_file(
        source_wav=source,
        target_wav=target,
        file_path="output.wav"
    )
    return "output.wav"

demo = gr.Interface(fn=greet, 
    inputs=[
        gr.Audio(label="Source audio", type="filepath"),
        gr.Audio(label="Target audio", type="filepath"), 
        gr.Dropdown(label="Model name", choices=["freevc24", "knnvc", "openvoice_v1", "openvoice_v2"])
    ],
    outputs=gr.Audio(type="filepath"))
demo.launch()