Ani DiFranco may not have tried every guitar ... tuning her 5th string up to B, her 4th string down to that very same pitch and her 1st string down to D, resulting in what could be called “open ...

I've been trying to get back into playing guitar and I've noticed one thing: Both the App Store and Google Play are replete with guitar-tuning apps that are full of either upsells or advertisements.