i just started singing backup harmonies in my band. i'm wondering if there has been any innovation in vocal monitoring in the past 20 years since i last had to do this in a band where we play, there's usually only one vocal monitor, and that goes to the lead singer of course. while i can hear that, it's not optimal. is there anything out there that will let me personally monitor myself? i keep envisioning that there's gotta be some kind of like iphone thing or belt pack that lets me wear a discreet mic and play it back immediately into an in ear or just a simple isolating ear bud that i can put in one ear. any ideas?