Different, isn't it? The guitarist has 78 fingers and 12 picks, the drummer has 21 sticks and six arms - and the keyboard player can flash multi-layered beams from its eyes.
Mach, Ashura and Cosmo form Z-Machines - a rock band made up of robots performing at an art and technology event in Tokyo, Japan.
The group, who made their debut live performance in July, were created by a group of engineers and academics at Tokyo University, and they hope to take their band to be able to perform in space one day. Now the question is, why does space need a band?
Well, maybe it's written in the stars...