Stillheard
Keep a loved one's voice, with their consent.
Family voice keepsakes cloned on your Mac with MLX, in 20+ languages including Telugu. Recorded consent is a hard gate, every clip is marked synthetic, and audio reaches family iPhones only over the home network.
What runs on your device
- MLX voice cloning
- Consent gate + synthetic marking
- LAN only with TLS-PSK pairing
About Stillheard
Stillheard keeps a voice you love on your own Mac and lets it say new things, privately and only within your family. Read a bedtime story in it, narrate a whole book overnight, or turn a tale into a play voiced by different family members.
Consent comes first. A living person reads a consent sentence in their own voice before their voice can be made, and a memorial voice needs a statement of authority and a second family member's agreement. Consent can be revoked at any time, and the voice goes silent immediately.
What you can do
- English and more than twenty other languages, including Telugu, Hindi, Tamil, Kannada, Malayalam and Bengali
- Read-along captions, with translations for the bundled stories
- Audiobooks narrated overnight
- Every clip marked as synthetic, twice
- A checker that tells you whether any audio file was made in Stillheard, in which voice, and with what consent
How it’s built
- Voice cloning runs on your Mac with MLX, using the studio's open-source speech-swift ports of Chatterbox TTS, Indic-Mio and Whisper
- Synthetic marking as a file label plus an inaudible watermark, written to a tamper-evident log
- Audio reaches family iPhones only over the home network, with TLS-PSK, per-request HMAC and six-digit pairing
- No accounts, no analytics and no server; the network is used only to download models
A closer look
Behind the build
I miss my father's voice, so I'm building it back
Old home recordings break modern voice AI. So I started building a consent-first voice keepsake that runs entirely on a Mac.