This is the priciest audio interface for Apple’s mobile devices we’ve seen thus far, and connects to the dock connector rather than headphones socket. It has a 1/4-inch instrument input with configurable pad, Lo-Z and Hi-Z modes, and an 1/8-inch stereo mic/line input with pad, normal and boost modes. Each input has 60dB of continuous level control, and there’s an output for headphones.
GuitarJack is particularly suited for use with Sonoma’s FourTrack, which now has a special control panel for it and supports recording from both inputs simultaneously.
Be aware that version 1 of the hardware doesn’t support the iPhone 4, iPod touch (4th generation) or iPad - these will be catered for by GuitarJack 2, which is scheduled to ship in the first quarter of 2011.