There's no reason these parameters can't be changed on the fly with a digital instrument. They can have knobs too. Also, many synths today will allow you to di

There's no reason these parameters can't be changed on the fly with a digital instrument. They can have knobs too. Also, many synths today will allow you to dial in a degree of noise, interference, pitch drift, or other artifacts if you want. People still inject those qualities deliberately into their recordings. Even when the original recording was crystal clear.