I don't understand the section "Remove all control points". When does Audacity automatically add envelope control points to a drum track? --> When you loop a drum sample.
Also, the procedure is unnecessarily complex. All you have to do is select the track and hit SHIFT + CTRL + M (Mix and Render to New Track) and you'll have the two versions of your track. -- Bill --> but that doesn't have control points. I want the control points so I can use the envelope to open and close drum parts.