tc electronic are letting the first 25 000 downloads of their Polytune app go for free. I've tried it on my "wall decoration" guitar with ancient strings and it seems to work as advertised. I was not convinced when I heard of this Polytune thing as they started making noise about it, but so far so good.
The link: http://itunes.apple.com/app/polytune/id364009203?mt=8
(all my regular guitars are unstrung at the mo and that guitar needs lots of money to become a fully usable instrument of music again, thus its decorative state)
The link: http://itunes.apple.com/app/polytune/id364009203?mt=8
(all my regular guitars are unstrung at the mo and that guitar needs lots of money to become a fully usable instrument of music again, thus its decorative state)