I just received a phone call asking me if I would be able to tune for a recital tomorrow afternoon at a church, to featuring a fortepiano tuned to A-428. From what I understand, it will be a "normal" equal temperment, but A-428 is not a pitch I am regularly accustomed to, nor am I entirely certain how to establish this pitch. Assuming I whip out the ol' trusty Sanderson II to set my "A", could someone tell me how many cents flat A-428 should be from A-440? Any additional suggestions would also be of help. Thanks! Rob Goodale, RPT Morthern Arizona U. Tech
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