Phoneme-Level Speech API

Listen and repeat — AI-driven shadowing practice

Improve your pronunciation by shadowing realistic AI-generated speech. The app uses Gemini TTS for the target audio and the Langcraft Phoneme API for phoneme-level feedback on your repetition.

How it works

  • Pick a sentence: choose any reference text or paste your own.
  • Hear it: Gemini TTS generates a natural target voice in your chosen accent.
  • Repeat it: record yourself shadowing the speech.
  • See phoneme-level feedback: Langcraft scores each phoneme and surfaces substitutions.

Get started

Review the API documentation, try the live demo, or request an API key to integrate phoneme-level speech analysis into your product.

Read the API docs Test the live demo Request an API key