This program was developed as an exercise in which students are to add "play sound until done" blocks in the Sequencer sprite to sequence MP3 sounds to reproduce the "Happy" song by Pharrell Williams. None of the other blocks need to be touched. Be sure to set "Turbo mode" under the Edit menu to improve playback of the sequenced sounds. However, note that the transition between the clips will not be perfect. That is, regardless of how careful one is, Scratch 2.0 cannot move from playing one MP3 file to another seamlessly.
Jesse Heines and Gena Greher UMass Lowell Performamatics Project August 2, 2014 developed for our workshop at Scratch@MIT 2014 on August 7, 2014