Does a deviation establish a synthetic voice?

No. A deviation is a bounded acoustic observation with alternative explanations. A nominal result also does not establish human origin.

How is audio and analysis data handled?

Confirm data handling separately for your deployment: audio storage, result retention, access controls, training use and subprocessors before use.

Does this replace speaker authentication?

No. The instrument does not enroll a speaker or compare a caller against an identity. Review any legal classification separately.

Documenting Voice Measurements for Review

Sonotheia measures physical properties of the voice and the channel in call audio and reports each one as nominal, deviated or unavailable, with the validity of the recording. A reviewer decides what to do with the result. Sonotheia does not decide whether a voice is synthetic.

Evidence should show what was measured, which threshold applied, what was unavailable and which alternatives remain. Confirm audio and result retention for the deployment before including artifacts in a review file.

What does the record establish?

A measurement record describes the audio and its limits. It does not prove human origin, identity, fraud, intent or authorization. Keep the observation separate from the reviewer's assessment and the institution's disposition.

What does Sonotheia measure?

The served pipeline runs several sensors that measure acoustic properties of speech. They include voicing duration, room response and ambient consistency, entropy of pitch and energy movement, pitch discontinuity, and an acoustic ensemble over hand-crafted features. Two further sensors record channel provenance and cast no vote. Evaluate identity and consent requirements separately for the deployment.

Are the models inspectable?

The measurements use hand-crafted acoustic features and documented model configurations. Features can describe natural-speech properties without establishing a synthetic-voice determination. Benchmark heads have been trained on spoofing attack families; no attack-independent training claim is made.

How does this become FinCEN or FINRA documentation?

A structured measurement record with the instrument version can support a compliance team's own review and SAR narrative preparation. It is not a qualified SAR filing or a determination that a reporting requirement has been met. The institution and its legal reviewers decide what to file. See the voice review evidence guide for review boundaries.

Who is this for, and who is it not for?

It is intended for people reviewing voice-driven requests before a consequential action. It does not provide speaker enrollment, an identity match or an MFA factor. Legal classification of a deployment requires counsel review.

What should you ask any vendor, including us?

Do you store voiceprints or raw audio after analysis? Can an investigator follow measurement to threshold to outcome without a data-science escort? Can you show the exact production baseline that was live when the decision was made? Does the evidence package map to the supervisory documentation your counsel already uses? Ask us the same four and hold the answers to the same standard.

Frequently asked questions

Does a deviation establish a synthetic voice?: No. A deviation is a bounded acoustic observation with alternative explanations. A nominal result also does not establish human origin.
How is audio and analysis data handled?: Confirm data handling separately for your deployment: audio storage, result retention, access controls, training use and subprocessors before use.
Does this replace speaker authentication?: No. The instrument does not enroll a speaker or compare a caller against an identity. Review any legal classification separately.
Can a compliance team use an evidence record?: A structured measurement record with the instrument version can support a compliance team's own review and SAR narrative preparation. It is not a qualified SAR filing or a determination that a reporting requirement has been met. The institution and its legal reviewers decide what to file.

Official regulatory references

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