Hume Octave Voice Design and Cloning + MCP vs Resemble AI Voice Cloning API

Hume Octave Voice Design and Cloning + MCP

Voice design from a natural-language description, saved with one call. Cloning over the API is Enterprise-only.

Resemble AI Voice Cloning API

Rapid clones from 10 seconds of audio, ready in under a minute. Cloning API only on Business ($1,000 a month) and Enterprise.

Hume Octave Voice Design and Cloning + MCP

1. Design with POST /v0/tts using an utterance description plus sample text, then save a generation_id with POST /v0/tts/voices
2. Request several generations and pick one. A saved voice can't be tuned afterwards
3. List your own voices with GET /v0/tts/voices?provider=CUSTOM_VOICE
4. Use /v0/tts/file or streaming rather than the JSON endpoint to keep base64 audio out of context
5. On E0811 back off and retry, the request was rate limited

Resemble AI Voice Cloning API

1. Create the voice, upload recordings or pass dataset_url, then call /build. Nothing trains until you do
2. Set callback_uri rather than polling for status to reach finished
3. Expect a rapid clone. Since 2026-06-30 API-created voices default to rapid, and create-voice has no field to pick another type
4. Upgrade any voice on a pre-Ultra model before synthesis, since those voices can no longer generate audio
5. Check success in every response body, log the request ID, and stay under 40 requests a second per token with your own backoff