Pronunciation Audio Attribution
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Mastermind Japanese includes pre-generated Japanese pronunciation audio.

How the audio was produced:
Pronunciation audio was generated offline using the AivisSpeech Engine
(https://github.com/Aivis-Project/AivisSpeech-Engine, LGPL-3.0) with the にせ (Nise) —
ノーマル (Normal) voice model. The engine and the voice model are licensed separately;
only the generated audio files are served from this site as static content. We do not
redistribute the AivisSpeech Engine binaries or the voice model weights.

Voice model:
Name:        にせ (ノーマル)
UUID:        6d11c6c2-f4a4-4435-887e-23dd60f8b8dd
License:     ACML 1.0 (https://github.com/Aivis-Project/ACML/blob/master/ACML-1.0.md)

Permissions under ACML 1.0:
ACML 1.0 permits personal, nonprofit, corporate, and commercial use of audio generated
with the voice model, subject to the prohibited-use categories listed in the license
(impersonation, defamation, misinformation, political/religious advocacy, criminal
activity, etc.). Mastermind's use — pronunciation reference audio inside a Japanese
language-learning application — does not fall under any prohibited category.

No affiliation / no endorsement:
The generated audio is not official content and is not affiliated with or endorsed by
Aivis Project, AivisHub, the model creator, or the speaker/character represented by
the voice model. The model name is used here solely for attribution; its use does not
imply sponsorship, partnership, or approval.

No live TTS at runtime:
No live text-to-speech service runs in the application at runtime. All pronunciation
audio is pre-rendered and served as static WAV files.

For full ACML 1.0 license terms, see:
https://github.com/Aivis-Project/ACML/blob/master/ACML-1.0.md