Cost per course hour: TTS narration budgeting — Audra
Unit economics matter once you leave trial volume — here is how Audra prices against list rates. Not for realtime voice agents or cloning.
Who this is for
- Finance and eng reviewing TTS unit economics at 500k–10M chars/month
- Teams comparing prepaid Audra packs vs seat-taxed voice platforms
- Builders who care about QA-gated refunds on failed renders
- Anyone modeling spend before a migration decision
Pricing focus: course hour economics
Audra Essential prepaid is $25/1M characters (volume tiers down to $12). Plus, Pro, and Conversations apply fixed multipliers on that base — full table on /pricing#engines.
- ElevenLabs-style list rates (~$120/1M) dominate at 2M+ chars/month for batch-only work
- OpenAI tts-1 (~$15/1M) wins raw $/char without mastering or large sync limits
- Audra bills QA-gated — failed renders auto-refund (see /blog/tts-api-billing-qa-gated)
- First $5 pack is 50% off with WELCOME20 after the 25k free trial
Run your real monthly volume on /calc before a finance review. Matrices: /vs/elevenlabs and /vs/openai-tts. Next: see the courses use case at /use-cases/courses.
Cost sanity check
Want to hear a sample on your own script? Get an API key at /dashboard — 25k free characters, no card.
FAQ
Is Audra OpenAI-compatible?
Yes. Point the OpenAI SDK at https://audratalks.com/v1 with model audra-essential — copy-paste on /migrate.
What does QA-gated billing mean?
Credits finalize only after automated QA passes. Failed renders refund automatically.
Does Audra support realtime voice agents?
No. Audra is a batch TTS API for mastered MP3/WAV files. For sub-200ms conversational agents, stay on a realtime-oriented provider.
Can I clone a custom brand voice?
No. Audra ships preset voices only. Use ElevenLabs (or similar) when cloning is a hard requirement — see /vs/elevenlabs.
Next steps
- Primary next step: see the courses use case at /use-cases/courses
- A/B voices on /compare
- Honest matrices: /vs/elevenlabs and /vs/openai-tts
- Read next: /blog/course-narration-tts-api
- Cost model: /calc