I didn't think "Stylophone Business Card" was in my *want nao* list, but here we are

Alex Jacobs made a musical business card that you can actually play by plugging into USB. It's essentially a midi controller with exposed contacts which act as keys

#HardwareHacking #Mixtela
https://www.youtube.com/watch?v=zHVrY_xLM3c&feature=emb_title