The LISNR Radius SDK does not record any audio. LISNR technology utilizes bandpass filters around the frequencies of interest and all other frequencies (including voice) are rejected. An audio buffer is used to detect the LISNR Radius Tone, and this buffer gets overwritten constantly and is never stored.

The Radius Sample Application (Android and iOS) has the ability to record audio for debugging purposes. This is separate functionality from the Radius SDK.