A few days ago we were recording some stuff. It's not like it's sometimes portrayed on film/TV with the whole band playing at all at once. It's technically possible to do it that way if you have an enormous budget and an army of technicians but for the most part it's much easier to concentrate on one part at a time. First one records the drums, then the bass, then the rhythm guitars. This then give a nice firm foundation for lead guitars, violins, synths and whatever complicated stuff to be recorded on, and then we put the vocals in.