Fluenty 504 pronunciation audio

These MP3 files are newly synthesized American-English pronunciations, generated
for this independent exercise resource. They are not recordings from the book
or its publisher. Voice: Kokoro af_heart; language en-us; speed 0.9.

Model: Kokoro-82M (v1.0), hexgrad, Apache License 2.0.
https://huggingface.co/hexgrad/Kokoro-82M
ONNX distribution: thewh1teagle/kokoro-onnx, model-files-v1.1.
https://github.com/thewh1teagle/kokoro-onnx
Inference software: kokoro-onnx (MIT License).
The American-English af_heart voice is synthetic, not a human recording.

License texts are supplied alongside this notice. The model and inference
software are not included in the web deployment folder. Audio is served from
the website itself; playback requires no third-party speech API or user data.