MAI-Voice-2.1 is public preview, no SLA: plan ad voiceover around it
Microsoft's MAI-Voice-2.1 doc says public preview, no SLA. What that means for a campaign deadline, and how to keep a fallback voice ready.
Microsoft's MAI-Voice-2.1 documentation marks the model as public preview with no service level agreement, so a campaign that must ship on a date should not depend on it alone. Keep a second voice source and save every approved take as a file.
What the page says
The Learn page says preview, no SLA, and notes Microsoft holds full licensing rights for commercial use. The model page lists $22 and $15 per million characters. Preview terms can change, so re-read before each campaign.
| Risk | Mitigation |
|---|---|
| No SLA | Second voice source ready |
| Voices may change | Archive approved audio, not just text |
| Price may change | Re-check the pricing page at order time |
| Style names differ per voice | Keep a per-voice style sheet |
Build the fallback early
A fallback is only useful if its voice is auditioned in advance. Pick one for each language and render the hero line in both. On Sume, a job is idempotent by key and capped by max_spend_usd, so a rerun does not double charge (API reference).
Honest limits
Sume TTS is a different voice, not a drop-in clone of a Microsoft voice. Switching mid-campaign changes how the brand sounds, so decide up front whether that is acceptable. We make no claim about Sume's uptime beyond its docs.
Sources
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