Simply play the guitar by holding one of the chord buttons on the fretboard and then strum the switch on the body, with the strength of your strumming translating to different dynamics in playback.

At the CES in Las Vegas, a stringless guitar is being presented for ... A kind of karaoke mode displays chord symbols and lyrics. Playing along with these took a little getting used to at the ...

There are plenty more music-related apps that make learning and playing guitar and other instruments much more accessible than 20 years ago, but these two are the essential must-have apps on my iPhone ...