Fact · Dictation on Windows
Voice Isolation stores a voice signature on the device and saves no raw voice recording.
Checked against its source on October 16, 2026
In the source's own words
“The model runs entirely on your device, and no raw voice recording is saved. ... Only a voice signature is created and stored locally.”
Improve speech recognition with Voice access, Microsoft, Microsoft Support, 2026, Set up Voice Isolation: Download the voice model.
Open the original- What it measures
- Microsoft's description of what the setup keeps.
- What it does not show
- The page does not say how the voice signature is protected beyond staying on the device.