Error code 88890008
Unsupported audio format
This error can occur when you try to record what you hear with the Sound Recorder.
You may try the things mentioned below, but if they don't help or if you need or want to use specific channel counts or specific audio effects, then there is unfortunately nothing we can do about it, because the audio drivers of your sound card just don't support loopback recording.
What you can try
This solution was reported by a user with an Astro A50 headset, that was connected to the computer with an optical cable.
Press Win+R > mmsys.cpl
- Double-click your speakers
- Go to the Advanced tab
- Uncheck Enable audio enhancements as shown on the screenshots
As this issue is sound card specific, you may try to search the web for the error code and your sound card, because there are special solutions for certain devices, e.g. for the Razer Kraken 7.1 Headset.