feat: Supertonic 3 TTS demo locale

- Demo Gradio con interfaccia web (B)
- Server HTTP con API nativa e OpenAI-compatibile (C)
- 31 lingue, italiano incluso
- 99M parametri, CPU-only, ONNX Runtime

app.py

@@ -0,0 +1,87 @@
+import os
+import uuid
+
+import gradio as gr
+from supertonic import TTS
+
+OUTPUT_DIR = "outputs"
+os.makedirs(OUTPUT_DIR, exist_ok=True)
+
+# The first run downloads the Supertonic model assets automatically.
+tts = TTS(auto_download=True)
+
+SUPPORTED_LANGUAGES = {
+    "Italiano": "it",
+    "Inglese": "en",
+    "Spagnolo": "es",
+    "Francese": "fr",
+    "Tedesco": "de",
+    "Portoghese": "pt",
+}
+
+VOICES = ["M1", "M2", "M3", "M4", "M5", "F1", "F2", "F3", "F4", "F5"]
+
+
+def generate_audio(text: str, language_label: str, voice: str):
+    """Generate a local WAV file with Supertonic TTS."""
+    if not text or not text.strip():
+        return None, "Inserisci un testo prima di generare l'audio."
+
+    lang = SUPPORTED_LANGUAGES.get(language_label, "it")
+    style = tts.get_voice_style(voice)
+
+    wav, _duration = tts.synthesize(
+        text.strip(),
+        voice_style=style,
+        lang=lang,
+    )
+
+    output_path = os.path.join(OUTPUT_DIR, f"supertonic_{uuid.uuid4().hex[:8]}.wav")
+    tts.save_audio(wav, output_path)
+
+    return output_path, f"Audio generato correttamente: {output_path}"
+
+
+with gr.Blocks(title="Supertonic Local Demo") as demo:
+    gr.Markdown(
+        """
+# Supertonic Local Demo
+
+Mini pannello locale per generare audio con Supertonic TTS.
+
+Scrivi un testo, scegli lingua e voce, poi genera un file WAV direttamente sul tuo PC.
+        """
+    )
+
+    with gr.Row():
+        with gr.Column():
+            text_input = gr.Textbox(
+                label="Testo",
+                lines=8,
+                value="Ciao, questo è un test vocale in italiano generato localmente con Supertonic.",
+            )
+            language_input = gr.Dropdown(
+                choices=list(SUPPORTED_LANGUAGES.keys()),
+                value="Italiano",
+                label="Lingua",
+            )
+            voice_input = gr.Dropdown(
+                choices=VOICES,
+                value="M1",
+                label="Voce",
+            )
+            generate_button = gr.Button("Genera audio")
+
+        with gr.Column():
+            audio_output = gr.Audio(label="Audio generato", type="filepath")
+            status_output = gr.Textbox(label="Stato")
+
+    generate_button.click(
+        fn=generate_audio,
+        inputs=[text_input, language_input, voice_input],
+        outputs=[audio_output, status_output],
+    )
+
+
+if __name__ == "__main__":
+    demo.launch(server_name="0.0.0.0")