AI Service > Text to Speech > Release Notes

July 7, 2026

  • Changed the domain
  • API v1.1 released
  • Added API using User Access Key token authentication.
  • For more information on issuing and using User Access Key tokens, see the User Access Key Token.

June 9, 2026

  • Changed supported languages
    • (Previous) Korean, Japanese, Chinese, English → (Updated) Korean
  • Changed supported options
    • (Previous) Gender, pitch, speed, volume, tone, intonation → (Updated) Gender, speed
  • Added new voice
    • Female2

September 26, 2023

  • Added supported languages
    • English (Female), Japanese (Male), Chinese (Male)
  • Improved voice quality
    • Improved voice quality when selecting Korean to synthesize the voice in English
  • Bug Fixes
    • Fixed an issue where, when selecting Chinese, voice synthesis in another language would fail

April 11, 2023

  • Added supported languages
    • Chinese (Female)
  • Improved voice quality

February 28, 2023

  • Improved speech synthesis speed
  • Added supported languages
    • English (Male), Japanese (Female)
  • Improved the console UI
    • Removed guide message at the top
    • Added tooltip

June 30, 2022

  • Added 'Voice Emotion' to detailed settings for voice synthesis
  • Changed the 'Female' voice among 'Voice Type'
  • Improved the preprocessing for speech synthesis

January 25, 2022

  • Text to Speech service released
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