Dramabox

Built on LTX-2 by Lightricks. Dramabox is Resemble AI's expressive TTS, trained on top of the LTX-2.3 audio branch under the LTX-2 Community License. Huge thanks to the Lightricks team for open-sourcing the base.

Made with ♥️ by

Dramabox is a prompt-driven TTS where the prompt itself controls everything — speaker identity, emotion, delivery, laughs, sighs, breaths, pauses, transitions. An optional 10-second voice reference clones the target timbre. It is an IC-LoRA fine-tune of the LTX-2.3 3.3B audio-only model (Diffusion Transformer + flow matching), conditioned on Gemma 3 12B text embeddings.

Quick start

Python (warm server — recommended, ~2.5 s / generation)

from src.inference_server import TTSServer

server = TTSServer(device="cuda")              # downloads weights on first run

server.generate_to_file(
    prompt='A woman speaks warmly, "Hello, how are you today?" '
           'She laughs, "Hahaha, it is so good to see you!"',
    output="output.wav",
    voice_ref="reference.wav",                  # optional, 10+ seconds of target voice
    cfg_scale=2.5,
    stg_scale=1.5,
    duration_multiplier=1.1,
    seed=42,
)

CLI

python src/inference.py \
    --prompt 'A woman speaks warmly, "Hello, how are you today?"' \
    --voice-sample reference.wav \
    --output output.wav \
    --cfg-scale 2.5 --stg-scale 1.5

Inference parameters

Prompt format

Inside double quotes — the model speaks these literally:

• Dialogue: "Hello, how are you?"
• Phonetic vocalisations (one word, no separators): "Hahaha", "Hehehe", "Mmmmm", "Ugh", "Argh", "Hmm"

Outside quotes — stage directions interpreted as performance cues, never spoken:

• She sighs deeply. · He clears his throat. · A long pause. · Her voice cracks. · He gulps nervously.

Avoid inside quotes (the model will speak the word literally): Sigh, Gasp, Cough, Ahem, Pfft.

Sample outputs

Regal Queen — Cold Fury to Venomous Whisper

A regal woman speaks with cold fury in a measured, low voice. She sighs deeply, "I have told you a thousand times, and yet here we are again." Her voice sharpens with rising anger, "Do you honestly think I enjoy repeating myself?! Do you?!" She lets out a cold, mocking laugh, "Hahaha, how utterly pathetic you are." She drops to a venomous whisper, leaning close, "Now get out of my sight before I do something we will both regret."

Reference

Generated

Catgirl — Uncontrollable Giggling

A playful girl speaks in a bright, singsong voice, already mid-giggle, "Hehehe, oh my gosh you should see your face right now, it is priceless!" She gasps for air between giggles, "Oh my, hehe, oh my, I cannot stop laughing!" She tries to compose herself with a long sigh, "Ahhhhh okay okay okay, I will stop, I promise I will stop." She leans in and whispers conspiratorially, "But seriously though, between you and me," then immediately loses it again, "Haha, no I, hehehe, I just cannot! You are way too funny, haha!" She snorts mid-laugh, "Pfft, oh no no no, that was so embarrassing, pretend you did not hear that!"

Reference

Generated

Villain — Sinister Laugh

A deep-voiced villain speaks with theatrical menace, chuckling softly at first, "Heh heh heh, ha ha ha ha ha! Oh, forgive me, forgive me." He catches his breath with a sinister grin, He clears his throat. "It is just SO amusing when they struggle, is it not?" His voice drips with contempt, "I ex