Azure AI Speech — Text-to-Speech

Generate narration with Azure neural TTS — high-quality multilingual voices, SSML prosody control, and express-as styles, served synchronously by the REST /cognitiveservices/v1 endpoint (no token exchange, Blob storage, or job polling). In OpenMontage this is exposed through the azure_tts tool (capability=tts, provider=azure). It is an optional cloud TTS provider — when AZURE_SPEECH_KEY is configured, prefer it for high-quality cloud narration. The local piper_tts remains the default offline path and the fallback when Azure is unavailable; elevenlabs_tts remains the choice for voice cloning.

Docs: REST text to speech · Voice gallery

Setup