Kiosk Browser 1.29 - microphone not working with WebRTC (getUserMedia returns NotReadableError)

Question

We are using Headwind MDM Kiosk Browser 1.29 to display a web application

on Android tablets. The app uses WebRTC with OpenAI Realtime API for voice

interaction (getUserMedia for microphone access).

Problem: When opening the voice feature, getUserMedia throws NotReadableError

- "Could not start audio source". Microphone permission is granted at the

Android level.

This happens specifically on the second open — after the first session closes,

the mic is not fully released by Kiosk Browser, so the next getUserMedia call

fails.

Questions:

1. Does Kiosk Browser 1.29 support microphone access for WebRTC web apps?

2. Is there a known fix or setting to properly release the microphone between sessions?

3. Is there a newer version of Kiosk Browser that fixes this?

Answer 1

The kiosk browser was designed to be used on standalone interactive devices (kiosks), and it currently does not have a microphone and camera permission.

If this will be changed in the future, we will let you know.