Good things are to be shared. Because we are big ROG family.

After researches, I found that Sonic studio 3 Will works on GX501 ZEPHYRUS.

The driver is compulsory. (even you have this version)
Here's the driver for Sonic studio 3
Download : https://drive.google.com/open?id=1nXm5zkN8J3i54XimjPqJDc6kM3KdWWVC

Sonic studio 3 (latest ver.) (not beta as always provided by asus)
Download : https://drive.google.com/open?id=17PjqXKFaE3SFwPLsDFSnaeXEfFdEohwL

Setup instructions :
1. After download both, turn off wifi or internet connection. ( avoid windows update to interfere with driver setup)
2. uninstall all sonic studio / sonic radar
3. Install driver as downloaded, with reboots and install. ( 2 reboot total, first run will uninstall old driver, after reboot will install automatically and then reboot again)
4. install sonic studio 3. Sonic Radar if you need.

For professional, Install Tuning utility if you wish to tune your laptop speaker /audio responses and quality. Share your profile;) and we can discuss together.
This seems to solve Audio quality present all the time before as well.

Enjoy. 😉