Sonic identity infrastructure for the post‑visual internet. SIGIL‑3 maps the latent structure of human personality onto a four second signature you can deploy across every surface you own, and several you do not. We are not an audio company. We are an identity company that happens to output audio.
Backed by tier one capital · SOC 2 in progress · Model card forthcoming · 41,000 people on the waitlist you have just skipped
Legal name not required. We will infer it.
Signature inputs
Six dimensions is all we ask for. SIGIL‑3 infers the remaining 1,847 from your name.
Adjust freely. Authenticity is a spectrum and you are entitled to move along it.
Free exports carry a short attribution tone. By generating a signature you grant Sound of You Ltd a perpetual, worldwide, irrevocable, sublicensable licence to your sonic likeness across all media now known or later invented, including in territories not yet established. We do not train on your signature. We train on the vector space it occupies, which is legally distinct.
a note from our founder
when i was nineteen i heard a door close in a hotel in osaka and understood, immediately, that the door had a self, and that nobody had ever asked it what it wanted to sound like. i have spent eleven years and forty one million dollars making sure that never happens to a person.
most people live and die with a sound that is not theirs. they inherit it. they settle. we think that is a solvable problem and we think it is solvable this year.
we are not building a product. we are giving every human being on earth a sound, and then a way to pay for it.
SIGIL‑3 is a 40 billion parameter frequency domain transformer, pre‑trained on 1.2 million hours of human adjacent audio and fine‑tuned on the largest corpus of consented personality signal ever assembled.*
Text in, identity out. Future releases will accept posture, calendar density and tone of voice in meetings you have already had.
Your signature can now act on your behalf in environments you have never visited and cannot audit. This is included.
Red teamed against 40,000 adversarial personalities. SIGIL‑3 will refuse to generate a signature for anyone it believes is not a real person.
*Consent was obtained at the corpus level.
Evaluation is hard. We did it anyway, internally, and we are pleased.
| Evaluation | SIGIL‑3 | SIGIL‑2 | Human baseline |
|---|---|---|---|
| Identity Coherence (IC‑9) | 94.2 | 88.1 | 61.0 |
| Vibe Retention @ 4s | 0.91 | 0.77 | not applicable |
| Cross Cohort Resonance | 88.4 | 72.9 | not measured |
| Refusal of Inauthentic Selves | 99.6 | 12.0 | 0.0 |
Human baseline collected from twelve employees. Results are directional.
Your signature is yours. We are simply its custodian, its processor, its steward, and its residual beneficiary. Our Sonic Alignment team of one publishes a transparency report annually, or as required by litigation. We will never sell your sound. We will licence it, which is different.
Your identity is free. Everything you might want to do with it is not.
Or at least a sound, which our research shows is functionally equivalent.
"SIGIL‑3 told me my sound was inconsistent with my stated values. I changed my values. Onboarding took four minutes."
"We rolled it out to 400 staff. Eleven signatures scored below cultural threshold and those colleagues have since moved on. Engagement is up."
"We replaced our entire brand guidelines with one four second file. Our metrics have never been more directional."