{"rewrite":{"id":"r_20067059ca5c349e1040407a","clusterId":"c_59635ec1242286447b6df266","slug":"blue-archive-tts-model-gets-natural-voice-upgrade-with-style-bert-vits2","model":"deepseek-v4-flash","headline":"Blue Archive TTS Model Gets Natural Voice Upgrade With Style-Bert-VITS2","summary":"At NEXON Korea's NDC26 conference, NEXON Games engineer Kim Myeong-ji detailed the development of a new TTS model for Blue Archive. The team adopted Style-Bert-VITS2, an open-source Japanese-focused model, to improve emotional expression and naturalness in character voices. The upgrade targets better reproduction of nuances like distress and joy, addressing specific feedback on long vowels and pitch in Japanese lines.","whyItMatters":"The shift to a model that treats punctuation as phonemes and uses style vectors marks a concrete technical step toward more emotionally responsive character voices in a live mobile game.","webCardHtml":"\u003cp\u003eNEXON Games engineer Kim Myeong-ji presented the development of a new TTS model for Blue Archive at NDC26, the company\u0026#39;s annual developer conference. The team selected Style-Bert-VITS2, an open-source model built for Japanese, after testing multiple candidates against criteria for character personality, emotional expression, and naturalness. Kim noted that Japanese lines required special attention to long vowels and pitch accents, which affect meaning in the language. The model treats punctuation marks as phonemes and uses a style vector to vary tone, moving beyond the single-tone generation of standard TTS. At the session, attendees heard a side-by-side comparison of Arona\u0026#39;s voice from the early model and the current one, with Kim reporting improved reproduction of emotions such as distress.\u003c/p\u003e","blueskyPost":"Blue Archive's TTS upgrade uses Style-Bert-VITS2, a Japanese model, to fix long vowel and pitch issues. The real work was adapting that model for Korean, not building from scratch.","twitterPost":"Blue Archive adapted a Japanese TTS model for Korean rather than building a new one. The trade-off: faster deployment but language-specific quirks to solve.","threadsPost":"Blue Archive's voice upgrade uses Style-Bert-VITS2, a Japanese-focused TTS model. The engineering challenge was adapting it for Korean while preserving emotional nuance. The team prioritized fixing specific complaints about long vowels and pitch over a ground-up Korean model.","newsletterBlurb":"At NDC26, NEXON Games engineer Kim Myeong-ji explained how the Blue Archive team upgraded its TTS system with Style-Bert-VITS2. The model improves emotional nuance and naturalness, especially for Japanese lines where long vowels and pitch affect meaning. The session included a comparison of Arona's voice from the early model to the current one.","attributionJson":"[{\"source\":\"4Gamer.net\",\"url\":\"https://www.4gamer.net/games/915/G091533/20260617028/\",\"title\":\"Voices That Let You Immerse in Characters: The Development of TTS Supporting 'Blue Archive' and the Journey to Adapt a Japanese-Specific Model to Korean [NDC26]\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4208,"outputTokens":615,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1781743322,"createdAt":"2026-06-18T00:31:20.000Z","publishedAt":"2026-06-18T00:34:57.000Z","updatedAt":"2026-06-18T00:34:57.000Z"},"cluster":{"id":"c_59635ec1242286447b6df266","canonicalTitle":"キャラクターに没入できる声を――「ブルアカ」を支えるTTS開発と，日本語特化モデルを韓国語へ対応させた道のり［NDC26］","representativeArticleId":"a_98fa3fb2e404c5290a0fd3da","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"ブルアカ (Blue Archive)\"],\"studios\":[\"NEXON Games\",\"NEXON Korea\"],\"people\":[],\"type\":\"news\",\"domain\":\"games\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-06-17T23:56:38.000Z","lastSeenAt":"2026-06-17T23:56:38.000Z","updatedAt":"2026-06-18T00:34:57.000Z"},"attribution":[{"source":"4Gamer.net","url":"https://www.4gamer.net/games/915/G091533/20260617028/","title":"キャラクターに没入できる声を――「ブルアカ」を支えるTTS開発と，日本語特化モデルを韓国語へ対応させた道のり［NDC26］"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["ブルアカ (Blue Archive)"],"studios":["NEXON Games","NEXON Korea"],"people":[],"type":"news","domain":"games","is_roundup":false},"keyFacts":["NEXON Games engineer Kim Myeong-ji presented the new TTS model for Blue Archive at NDC26, NEXON Korea's annual developer conference.","The team selected Style-Bert-VITS2, an open-source Japanese-focused model, after testing multiple candidates for character personality, emotional expression, and naturalness.","The model treats punctuation marks as phonemes and uses a style vector to vary tone, moving beyond single-tone generation of standard TTS.","Attendees heard a side-by-side comparison of Arona's voice from the early model and the current one, with Kim reporting improved reproduction of emotions such as distress."]}