That's the driver i downloaded, I have an ASUS ROG MAXIMUS XI HERO.
Failed to play sound test tone error message can appear if your audio device isn't set as default device. To fix this problem, you need to do the following: Open the
Sound window. You can do that by right clicking the
sound icon in the bottom right corner and choosing
Playback devices.
Make sure the good playback device is being used. Sometime after installing audio drivers the playback device switch to something else. Like here I have speaker on my monitor and when I installed the audio drivers it was set for the monitor and there was no sound in my headset. Had to change the audio source realtek audio.