# Courio

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Florent Rudel Ndeffo](https://cerebralvalley.ai/u/FlorentRu)
- **GitHub:** https://github.com/FlorentRu/courio-hackathon
- **Demo video:** https://youtu.be/5GTs4qrflNs
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1250

Courio is a friends-only letter app: each friend designs a 3D companion that carries their letters, and on Meta Quest the companion walks through a door into your room to hand them over. That part existed before the hackathon.

This week I gave the companions a voice with Meta's models:
- Reading aloud: the companion reads the letter in a voice that fits its look. When a letter mixes French and English in one sentence, Muse Spark marks which words are in which language so each part gets a native voice.
- Translation: one press translates the letter with Muse Spark; the original is one tap away.
- Answer by voice: a headset has no keyboard, so you speak. Muse Voice Transcribe turns it into text and Muse Spark tidies it into a short letter in your own words, adding nothing you didn't say. Nothing is sent until you press Send.
- Or type on a keyboard drawn in the room, and six new animated ways to open a letter.

The reply is carried home by the companion and reaches your friend's phone about ten seconds later. Tested on a real Meta Quest 3 at Meta Lab, Fifth Avenue. Courio is friends-only, 16+, no ads, and the AI only runs when you press a button.

Live app: https://courio-xr.netlify.app

## More from Meta Global AI Developer Hackathon

- [ProofForge](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1247)
- [Team M.E.G.A](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1248)
- [DataSec Chronicles](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1249)
- [sparsadev](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1251)
- [Food Bundles](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1252)
- [WRU](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1253)

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