You can play and record a virtual instrument using studio one. You can also add new part to any song you want. First open the instrument to play or record it with any song. To open it, click on instruments in the browser tab and go to the preSonus folder and then click on presence. Now you can browse and open all the instruments in there for example, open and use a keyboard sound. So click on keyboard and open studioDyno1. In this video a instrument track has already been created and instrument is ready to play using the keyboard control. Now you are ready to start recording and add new part to the song.