Stillheard

Stillheard keeps a voice you love on your own Mac, and lets it say new things,
privately, and only within your family.

Write a few words and hear them in that voice. Read a bedtime story in it, in English
or in an Indian language your family keeps at home. Narrate a whole book overnight and
keep it as an audiobook. Turn a tale into a play where each character speaks in a
different family voice. Everything happens on your own devices: there are no accounts,
no cloud, and nothing is ever uploaded.

CONSENT COMES FIRST
There is no way to make a voice that skips consent. A living person reads a short
consent sentence in their own voice before their voice can be created. A memorial voice
asks for a statement of authority and a second family member who agrees. Consent
travels with the voice, is visible in the app, and can be revoked at any time, and the
voice goes silent immediately.

MANY LANGUAGES, INCLUDING YOURS
Stillheard speaks English and more than twenty other languages, including the Indian
languages many families keep at home: Telugu, Hindi, Tamil, Kannada, Malayalam,
Bengali, and more. Read a tale in the language it was written in, and turn on read-along
captions that show each line as it is spoken. For the bundled stories you can show a
translation beneath, so everyone in the room can follow along.

EVERY CLIP SAYS WHAT IT IS
Every piece of audio Stillheard makes is marked as synthetic in a machine-readable way,
twice: a label in the file, and an inaudible mark woven into the sound, written to a
tamper-evident log. Point the app at any audio file and it will tell you whether it was
made here, in which voice, and with what consent.

ON YOUR DEVICES, NOT IN A CLOUD
No accounts. No analytics. No server. Stillheard uses the network only to download the
models it runs on, its speech models and an optional transcription model, and, if you
choose to turn it on, to serve voices to your own approved devices over your own Wi-Fi.
Every one of those models runs on your Mac, not in a cloud service.

WHAT YOU CAN MAKE
- Speak: write a line and hear it, kept as a keepsake with its provenance.
- Stories: a shelf of bedtime tales read in a familiar voice, with read-along captions
and a bedside player that stays dark. Paste your own tales too.
- Books: a library of public-domain classics, and a way to bring in your own book
(text, EPUB, or PDF) and narrate it overn