In 2015 I started practicing advanced exercises written by Jordan Rudess.
In this exercise I play with The Master. The backing track is played by Jordan Rudess. This exercise is called "All Done With Mirrors"
After practicing exercises for about a year, I think I'm ready to record a few etudes and techniques.
The book I use is: Total Keyboard Wizardry. A Technique and Improvisation Workbook By Jordan Rudess. Published by Cherry Lane Music