This tracker (for windows) allows you to create chiptunes/8-bit music using software that mimics the original software used to write music on old gaming consoles. Although this might be difficult to work with, it could tie into STEM/STEAM projects.
I believe this video is an excellent represenation of what is possible through STEM/STEAM. Onyx Ashanti describes and demonstrates the digital instrument he created.
"This session will explore various uses of technology to augment performing in ways that were previously unimaginable. The focal points of the session will revolve around exploring questions such as: How can technology be used to include all students? In what ways can technology be used to think deeper about performing music? Where is there a place for digital and hybrid musicianship in our programs? How can we find out how to use technology to augment musicianship? Experience with technology is not required; however, bringing a laptop, tablet, and/or smart phone will assist with the discussion and experience."