aye i need ECGCAC for bron-y-aur by zepplin. Cant figure out how its done, are there special eletronic tuners out there to do the job? Theres a 'flat' button on mine which lets you add up to 4 'flat's to tune to. Has it got somthing to do with that? Ive been told I need a tuner with 'sharp's.