Added code to generate the default voices (#144)

scripts/generate_default_voices.py

@@ -0,0 +1,23 @@
+import scipy.io.wavfile
+
+from pocket_tts import TTSModel, export_model_state
+from pocket_tts.utils.utils import _ORIGINS_OF_PREDEFINED_VOICES
+
+model = TTSModel.load_model()
+
+for voice_name, voice_origin in _ORIGINS_OF_PREDEFINED_VOICES.items():
+    print(f"Processing voice: {voice_name} from origin: {voice_origin}")
+    # Export a voice state for fast loading later
+    model_state = model.get_state_for_audio_prompt(voice_origin)
+    export_model_state(model_state, f"./built-in-voices/{voice_name}.safetensors")
+
+    model_state_copy = model.get_state_for_audio_prompt(
+        f"./built-in-voices/{voice_name}.safetensors"
+    )
+
+    audio = model.generate_audio(
+        model_state_copy, "Hello, it's a good day, isn't it? I hope you are doing well."
+    )
+    scipy.io.wavfile.write(
+        f"./built-in-voices-generated/{voice_name}.wav", model.sample_rate, audio.numpy()
+    )