Yousician.com

Using the latest version, the scrolling stutters every half second or so causing the display to lag behind the beat until it catches up again. This makes it impossible to use the visuals for timing.

On the Mac the scrolling is smooth.

After alot of troubleshooting i learned that screen lag can be a result of refresh rate. So i changed my rate from 30hz to 60hz and Yousician is playing without stutter or lag.