app.py

import spaces
import gradio as gr
import soundfile as sf
import numpy as np
from dia.model import Dia

# Load the model once
model = Dia.from_pretrained("nari-labs/Dia-1.6B")

@spaces.GPU
def generate_dialogue(script):
    output = model.generate(script)
    filename = "generated_dialogue.wav"
    sf.write(filename, output, 44100)
    return filename

with gr.Blocks() as demo:
    gr.Markdown("## 🎙️ Dia - Text to Dialogue Demo")
    gr.Markdown("Enter a multi-speaker script below using `[S1]`, `[S2]`, etc.")

    with gr.Row():
        script_input = gr.Textbox(
            label="Script", 
            lines=6, 
            value="[S1] Dia is an open weights text to dialogue model. [S2] You get full control over scripts and voices. [S1] Wow. Amazing. (laughs) [S2] Try it now on Git hub or Hugging Face."
        )

    with gr.Row():
        generate_btn = gr.Button("Generate Audio")

    with gr.Row():
        audio_output = gr.Audio(label="Generated Dialogue", type="filepath")

    generate_btn.click(
        fn=generate_dialogue,
        inputs=script_input,
        outputs=audio_output
    )

demo.launch()