LAVA Music has launched its new LAVA ME 4 lineup of 'smart' acoustic-electric guitars, featuring a powerful new DSP system running onboard effects. The new OS has new apps for online jamming, interactive learning, 24-bit recording and new effects presets. Also new is a truss rod for adjusting string height, longer battery life and a pair of wireless foot pedals. The guitars come in carbon fiber, spruce-top and laminate body versions and a range of colors, and are priced from US$399 to US$999.