My goal is to shorten the overall length of a song in MixPad. A song runs for about 3 minutes, but I want it to run for 2. So I decided to increase the playback speed. So far, I have split the music clip and placed them into two different tracks. (I want the beginning to stay the same.) With the split clip selected, I clicked on Playback Speed and increased it. However, the timing does not change as I thought it would. How do I do this?