Many guitarists have often wondered, How can I play eight different string instruments during a song? By many, we actually mean one guitarist, specifically Justin Stone, who conceived his eight-neck Rocktopus guitar while absent-mindedly scribbling on a scrap of paper.

PRS Guitars has introduced the P22 Trem model guitar. The solidbody piezo-equipped P22 Trem is essentially two guitars in one, providing the same classic humbucker tones and authentic acoustic sounds as the original P22 now with the added versatility of PRS’ prized tremolo bridge.

Positive Grid may be a newcomer to the ever-expanding world of amp-and-effect emulation apps, but it has quickly established a reputation for designing some of the best-sounding apps for guitarists on the market today. Its flagship product—the JamUp Pro XT app for Apple iOS devices—provides six amp models and 16 effects, which can be expanded up to 26 different amp models and 34 effects by purchasing optional expansion packs and individual models.p.

The following content is related to the May 2013 issue of Guitar World. For the full range of interviews, features, tabs and more, pick up the new issue on newsstands now, or in our online store.