There are a few reasons this could happen:
- If you have a voice assistant enabled that is always listening (e.g. it responds to “Hey, Google”), it can steal the mic from koala and not let it access it. To fix that you have to disable the always listening functionality in your assistant’s settings.
- Another reason might be that you didn’t allow microphone permissions for koala.
- Another reason is that there might be a problem with your phone’s low latency audio driver – to fix this, go into koala’s audio settings and toggle “OpenSL”
If it still doesn’t work after that, please get in touch with me here.
tldr;
Some phone manufacturers choose not to implement google’s low latency audio API correctly (e.g. Samsung S10+). To fix this: you can switch to “Safe audio mode” – To do this, go to settings > audio, then enable “Safe audio mode”
This uses the traditional audio drivers that have more latency, but are better supported by phone manufacturers, if you’re having mic issues.