Ever noticed acoustic gigs are a rare breed now? Except for Ed Sheeran and his trusty guitar, of course, who still sneaks in a looper for good measure. These days, everything is 'electronic music', thanks to all the digital gizmos every guitarist hooks up to their instrument.

Enter the smart guitar: it looks classic but is packed with an acoustic system and a processor for all your effects, right inside its frame.

Oh, and controlling it from your iPhone? Peak 21st century. From cow gut strings to smart guitars, no wonder everyone's lining up for these.