Welcome

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📢 Supertone API Update

Hello Supertone API users,
A major update to the Supertone API was applied on Thursday, July 31, 2025.
Please review the details below to check if any adjustments are needed for your service.

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1. Separation of Preset Voice and Custom Voice

• Preset Voice: Voices created and provided by Supertone
  
• Custom Voice: Voices registered and managed by the customer

Previously, the /v1/voices endpoint only supported listing and searching.
With this update, the new /v1/custom-voices endpoint supports registration, retrieval, searching, and editing.
Additionally, cloned voices that were registered via Supertone Play can now be fully managed through /v1/custom-voices.

>> No impact on other requests such as Text-to-Speech, Predict Duration.
>> For backward compatibility,/v1/voiceswill continue to list and search Custom Voices until 31 August 2025.

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2. Voice Cloning Registration via API

You will be able to register new Voice Clones directly through the API, not only through Supertone Play.

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3. Streaming TTS (Beta)

A Streaming TTS API will be released in beta, enabling low‑latency audio generation for real‑time services such as AI chatbots and character‑chat applications.
With streaming, you can start receiving audio almost immediately instead of waiting for the entire text to be synthesized.

Thank you for using Supertone.