In short, it is highly unlikely that AI or a voice changer was used, and the two voices are similar enough to be legally considered the same.
結論
AI 使用の可能性→極めて低い
ボイスチェンジャー使用の可能性→極めて低い
2人の声はアメリカの裁判で同一と判断されるレベルで一致している
Quote
VTuber Insider Japan
@VTuberInsiderJP
Here is a part of the audio analysis results from the PDF. (It appears that “A” is the voice of Harusaki Nodoka from hololive, and “B” is believed to be the voice of Uruma Rinne.)
音声の解析結果のPDFの1部がこちらです。(Aがホロライブ春先のどかの音声でBが潤舞リンネの音声)
