app.py

import os
import shlex
import subprocess

subprocess.run(shlex.split("pip install flash-attn  --no-build-isolation"), env=os.environ | {"FLASH_ATTENTION_SKIP_CUDA_BUILD": "TRUE"}, check=True)
subprocess.run(shlex.split("pip install https://github.com/state-spaces/mamba/releases/download/v2.2.4/mamba_ssm-2.2.4+cu12torch2.4cxx11abiFALSE-cp310-cp310-linux_x86_64.whl"), check=True)
subprocess.run(shlex.split("pip install https://github.com/Dao-AILab/causal-conv1d/releases/download/v1.5.0.post8/causal_conv1d-1.5.0.post8+cu12torch2.4cxx11abiFALSE-cp310-cp310-linux_x86_64.whl"), check=True)

import spaces
import torch
import torchaudio
import gradio as gr
from os import getenv

from zonos.model import Zonos
from zonos.conditioning import make_cond_dict, supported_language_codes

device = "cuda"
MODEL_NAMES = ["Zyphra/Zonos-v0.1-transformer", "Zyphra/Zonos-v0.1-hybrid"]
MODELS = {name: Zonos.from_pretrained(name, device=device) for name in MODEL_NAMES}
for model in MODELS.values():
    model.requires_grad_(False).eval()


def update_ui(model_choice):
    """
    Dynamically show/hide UI elements based on the model's conditioners.
    We do NOT display 'language_id' or 'ctc_loss' even if they exist in the model.
    """
    model = MODELS[model_choice]
    cond_names = [c.name for c in model.prefix_conditioner.conditioners]
    print("Conditioners in this model:", cond_names)

    text_update = gr.update(visible=("espeak" in cond_names))
    language_update = gr.update(visible=("espeak" in cond_names))
    speaker_audio_update = gr.update(visible=("speaker" in cond_names))
    prefix_audio_update = gr.update(visible=True)
    emotion1_update = gr.update(visible=("emotion" in cond_names))
    emotion2_update = gr.update(visible=("emotion" in cond_names))
    emotion3_update = gr.update(visible=("emotion" in cond_names))
    emotion4_update = gr.update(visible=("emotion" in cond_names))
    emotion5_update = gr.update(visible=("emotion" in cond_names))
    emotion6_update = gr.update(visible=("emotion" in cond_names))
    emotion7_update = gr.update(visible=("emotion" in cond_names))
    emotion8_update = gr.update(visible=("emotion" in cond_names))
    vq_single_slider_update = gr.update(visible=("vqscore_8" in cond_names))
    fmax_slider_update = gr.update(visible=("fmax" in cond_names))
    pitch_std_slider_update = gr.update(visible=("pitch_std" in cond_names))
    speaking_rate_slider_update = gr.update(visible=("speaking_rate" in cond_names))
    dnsmos_slider_update = gr.update(visible=("dnsmos_ovrl" in cond_names))
    speaker_noised_checkbox_update = gr.update(visible=("speaker_noised" in cond_names))
    unconditional_keys_update = gr.update(
        choices=[name for name in cond_names if name not in ("espeak", "language_id")]
    )

    return (
        text_update,
        language_update,
        speaker_audio_update,
        prefix_audio_update,
        emotion1_update,
        emotion2_update,
        emotion3_update,
        emotion4_update,
        emotion5_update,
        emotion6_update,
        emotion7_update,
        emotion8_update,
        vq_single_slider_update,
        fmax_slider_update,
        pitch_std_slider_update,
        speaking_rate_slider_update,
        dnsmos_slider_update,
        speaker_noised_checkbox_update,
        unconditional_keys_update,
    )


@spaces.GPU(duration=120)
def generate_audio(
    model_choice,
    text,
    language,
    speaker_audio,
    prefix_audio,
    e1,
    e2,
    e3,
    e4,
    e5,
    e6,
    e7,
    e8,
    vq_single,
    fmax,
    pitch_std,
    speaking_rate,
    dnsmos_ovrl,
    speaker_noised,
    cfg_scale,
    min_p,
    seed,
    randomize_seed,
    unconditional_keys,
    progress=gr.Progress(),
):
    """
    Generates audio based on the provided UI parameters.
    We do NOT use language_id or ctc_loss even if the model has them.
    """
    selected_model = MODELS[model_choice]

    speaker_noised_bool = bool(speaker_noised)
    fmax = float(fmax)
    pitch_std = float(pitch_std)
    speaking_rate = float(speaking_rate)
    dnsmos_ovrl = float(dnsmos_ovrl)
    cfg_scale = float(cfg_scale)
    min_p = float(min_p)
    seed = int(seed)
    max_new_tokens = 86 * 30

    if randomize_seed:
        seed = torch.randint(0, 2**32 - 1, (1,)).item()
    torch.manual_seed(seed)

    speaker_embedding = None
    if speaker_audio is not None and "speaker" not in unconditional_keys:
        wav, sr = torchaudio.load(speaker_audio)
        speaker_embedding = selected_model.make_speaker_embedding(wav, sr)
        speaker_embedding = speaker_embedding.to(device, dtype=torch.bfloat16)

    audio_prefix_codes = None
    if prefix_audio is not None:
        wav_prefix, sr_prefix = torchaudio.load(prefix_audio)
        wav_prefix = wav_prefix.mean(0, keepdim=True)
        wav_prefix = torchaudio.functional.resample(wav_prefix, sr_prefix, selected_model.autoencoder.sampling_rate)
        wav_prefix = wav_prefix.to(device, dtype=torch.float32)
        with torch.autocast(device, dtype=torch.float32):
            audio_prefix_codes = selected_model.autoencoder.encode(wav_prefix.unsqueeze(0))

    emotion_tensor = torch.tensor(list(map(float, [e1, e2, e3, e4, e5, e6, e7, e8])), device=device)

    vq_val = float(vq_single)
    vq_tensor = torch.tensor([vq_val] * 8, device=device).unsqueeze(0)

    cond_dict = make_cond_dict(
        text=text,
        language=language,
        speaker=speaker_embedding,
        emotion=emotion_tensor,
        vqscore_8=vq_tensor,
        fmax=fmax,
        pitch_std=pitch_std,
        speaking_rate=speaking_rate,
        dnsmos_ovrl=dnsmos_ovrl,
        speaker_noised=speaker_noised_bool,
        device=device,
        unconditional_keys=unconditional_keys,
    )
    conditioning = selected_model.prepare_conditioning(cond_dict)

    estimated_generation_duration = 30 * len(text) / 400
    estimated_total_steps = int(estimated_generation_duration * 86)

    def update_progress(_frame: torch.Tensor, step: int, _total_steps: int) -> bool:
        progress((step, estimated_total_steps))
        return True

    codes = selected_model.generate(
        prefix_conditioning=conditioning,
        audio_prefix_codes=audio_prefix_codes,
        max_new_tokens=max_new_tokens,
        cfg_scale=cfg_scale,
        batch_size=1,
        sampling_params=dict(min_p=min_p),
        callback=update_progress,
    )

    wav_out = selected_model.autoencoder.decode(codes).cpu().detach()
    sr_out = selected_model.autoencoder.sampling_rate
    if wav_out.dim() == 2 and wav_out.size(0) > 1:
        wav_out = wav_out[0:1, :]
    return (sr_out, wav_out.squeeze().numpy()), seed


def build_interface():
    with gr.Blocks(theme='ParityError/Interstellar') as demo:
        gr.Markdown("# Zonos v0.1")
        gr.Markdown("State of the art text-to-speech model [[model]](https://huggingface.co/collections/Zyphra/zonos-v01-67ac661c85e1898670823b4f), [[blog]](https://www.zyphra.com/post/beta-release-of-zonos-v0-1), [[Zyphra Audio (hosted service)]](https://maia.zyphra.com/sign-in?redirect_url=https%3A%2F%2Fmaia.zyphra.com%2Faudio) ")
        with gr.Row():
            with gr.Column():
                text = gr.Textbox(
                    label="Text to Synthesize",
                    value="Zonos uses eSpeak for text to phoneme conversion!",
                    lines=4,
                    max_length=500,  # approximately
                )
                with gr.Row():
                    language = gr.Dropdown(
                        choices=supported_language_codes,
                        value="en-us",
                        label="Language",
                    )
                    model_choice = gr.Dropdown(
                        choices=MODEL_NAMES,
                        value="Zyphra/Zonos-v0.1-transformer",
                        label="Zonos Model Type",
                        info="Select the model variant to use.",
                    )
                speaker_noised_checkbox = gr.Checkbox(
                    label="Denoise Speaker?",
                    value=False
                )
                speaker_audio = gr.Audio(
                    label="Optional Speaker Audio (for cloning)",
                    type="filepath",
                )
                generate_button = gr.Button("Generate Audio")
                
            with gr.Column():
                output_audio = gr.Audio(label="Generated Audio", type="numpy", autoplay=True)
        
        with gr.Accordion("Toggles", open=True):
            gr.Markdown(
                "### Emotion Sliders\n"
                "Warning: The way these sliders work is not intuitive and may require some trial and error to get the desired effect.\n"
                "Certain configurations can cause the model to become unstable. Setting emotion to unconditional may help."
            )
            with gr.Row():
                emotion1 = gr.Slider(0.0, 1.0, 1.0, 0.05, label="Happiness")
                emotion2 = gr.Slider(0.0, 1.0, 0.05, 0.05, label="Sadness")
                emotion3 = gr.Slider(0.0, 1.0, 0.05, 0.05, label="Disgust")
                emotion4 = gr.Slider(0.0, 1.0, 0.05, 0.05, label="Fear")
            with gr.Row():
                emotion5 = gr.Slider(0.0, 1.0, 0.05, 0.05, label="Surprise")
                emotion6 = gr.Slider(0.0, 1.0, 0.05, 0.05, label="Anger")
                emotion7 = gr.Slider(0.0, 1.0, 0.1, 0.05, label="Other")
                emotion8 = gr.Slider(0.0, 1.0, 0.2, 0.05, label="Neutral")
            
            gr.Markdown(
                "### Unconditional Toggles\n"
                "Checking a box will make the model ignore the corresponding conditioning value and make it unconditional.\n"
                'Practically this means the given conditioning feature will be unconstrained and "filled in automatically".'
            )
            with gr.Row():
                unconditional_keys = gr.CheckboxGroup(
                    [
                        "speaker",
                        "emotion",
                        "vqscore_8",
                        "fmax",
                        "pitch_std",
                        "speaking_rate",
                        "dnsmos_ovrl",
                        "speaker_noised",
                    ],
                    value=["emotion"],
                    label="Unconditional Keys",
                )
                    
        with gr.Accordion("Advanced Settings", open=False):
            with gr.Row():
                with gr.Column():
                    gr.Markdown("## Conditioning Parameters")
                    dnsmos_slider = gr.Slider(1.0, 5.0, value=4.0, step=0.1, label="DNSMOS Overall")
                    fmax_slider = gr.Slider(0, 24000, value=24000, step=1, label="Fmax (Hz)")
                    vq_single_slider = gr.Slider(0.5, 0.8, 0.78, 0.01, label="VQ Score")
                    pitch_std_slider = gr.Slider(0.0, 300.0, value=45.0, step=1, label="Pitch Std")
                    speaking_rate_slider = gr.Slider(5.0, 30.0, value=15.0, step=0.5, label="Speaking Rate")
    
                with gr.Column():
                    gr.Markdown("## Generation Parameters")
                    cfg_scale_slider = gr.Slider(1.0, 5.0, 2.0, 0.1, label="CFG Scale")
                    min_p_slider = gr.Slider(0.0, 1.0, 0.15, 0.01, label="Min P")
                    seed_number = gr.Number(label="Seed", value=420, precision=0)
                    randomize_seed_toggle = gr.Checkbox(label="Randomize Seed (before generation)", value=True)
            
            prefix_audio = gr.Audio(
                value="assets/silence_100ms.wav",
                label="Optional Prefix Audio (continue from this audio)",
                type="filepath",
            )

        model_choice.change(
            fn=update_ui,
            inputs=[model_choice],
            outputs=[
                text,
                language,
                speaker_audio,
                prefix_audio,
                emotion1,
                emotion2,
                emotion3,
                emotion4,
                emotion5,
                emotion6,
                emotion7,
                emotion8,
                vq_single_slider,
                fmax_slider,
                pitch_std_slider,
                speaking_rate_slider,
                dnsmos_slider,
                speaker_noised_checkbox,
                unconditional_keys,
            ],
        )

        # On page load, trigger the same UI refresh
        demo.load(
            fn=update_ui,
            inputs=[model_choice],
            outputs=[
                text,
                language,
                speaker_audio,
                prefix_audio,
                emotion1,
                emotion2,
                emotion3,
                emotion4,
                emotion5,
                emotion6,
                emotion7,
                emotion8,
                vq_single_slider,
                fmax_slider,
                pitch_std_slider,
                speaking_rate_slider,
                dnsmos_slider,
                speaker_noised_checkbox,
                unconditional_keys,
            ],
        )

        # Generate audio on button click
        generate_button.click(
            fn=generate_audio,
            inputs=[
                model_choice,
                text,
                language,
                speaker_audio,
                prefix_audio,
                emotion1,
                emotion2,
                emotion3,
                emotion4,
                emotion5,
                emotion6,
                emotion7,
                emotion8,
                vq_single_slider,
                fmax_slider,
                pitch_std_slider,
                speaking_rate_slider,
                dnsmos_slider,
                speaker_noised_checkbox,
                cfg_scale_slider,
                min_p_slider,
                seed_number,
                randomize_seed_toggle,
                unconditional_keys,
            ],
            outputs=[output_audio, seed_number],
        )

    return demo


if __name__ == "__main__":
    demo = build_interface()
    share = getenv("GRADIO_SHARE", "False").lower() in ("true", "1", "t")
    demo.launch(server_name="0.0.0.0", server_port=7860, share=share, ssr_mode=False)