From heavy metal to pop, the guitar synthesizer is one of the most commonly used additions for any guitar player. It’s what gives rock songs that piercing distortion and the woeful tones to the blues.

Guitar synthesis has evolved from a complex, pickup-dependent technology to an accessible tool that any guitarist can use to expand their sonic palette. Today’s synth pedals eliminate the barriers ...

Roxsyn -- a synth that rocks. Photo: Charlie Sorrel/Cult of Mac Roxsyn is the “world’s first metamorphic guitar synthesizer” for iPad. The app lets you plug in your guitar and, when you play it, ...