GH Tools v2.0 by No1mann is one of the most simple ways to modify Guitar Hero charts.
Features include; note shuffle, mirror mode, forcing all tapping notes and creating “3999” charts. Furthermore, you can change the tempo or reverse a chart, which means for endless possibilities when combining with programs like Audacity (click to download). You can easily change the tempo of, or reverse any audio file using Audacity, a free audio editing program.
For charters; converting forced notes and tapping sections added as events in feedback is easy using GH Tools. The one-click option is far more efficient than using “find and replace” in notepad.
If you want to learn more, see the YouTube video by No1Mann