HeyGen speech Use the registered tools, not the retired /v1/audio speech endpoints. - : native HeyGen Voice1 / Turbo / Turbo Free. Native ACTIVE public, instant or professional voices from . Professional voices require Voice1 (not Turbo). Output is44.1kHz WAV; text limit5,000 chars. - : catalog voices from ; explicit engine selection on (Starfish, HeyGen Voice, or ElevenLabs). These voice IDs are not interchangeable with native clone IDs. - : timing-preserving conversion with an ACTIVE instant workspace voice via . Read the October23 provider guide for current request fields, output paths, ti…