Dear Audacity users,
I want to thank you a billion times for the great help guide of Audacity!
My Realtek HD Audio Line in(s) did not play any sounds for many years. I did a lot of time extensive troubleshooting but never found a solution on the internet.
When I tried to record with Audacity I got the “Error -9999 Unanticipated Host Error” and a short look into the help guide brought me to the final solution after so many years:
I had to enable the Windows (10) microphone access to also activate the line in(s) of my Realtek onboard audio (mainboard: GA-Z97MX-Gaming 5)!!! This was absolutely not logical and completely counterintuitive to me, as I never used a microphone with that desktop.
I hope this topic will help many other desperate users around the world by showing up in their internet searches!
Thank you from my heart 