GuitarJack puts studio in your pocket - CNET
Summary
Recording with your iPhones built-in microphone is a quick and easy way for musicians to sketch out song ideas. But if youre really bent on transforming your iPhone or iPod Touch into a mobile, multitrack recording studio, youll need to drop some money on a quality recording app, and some kind of adapter for connecting instruments or mixers. Professional, affordable apps such as FourTrack and FiRe recorder solve the first half of the equation, but shrinking a professional audio interface down to a pocketable iPhone adapter is a tall order. More importantly, the line and instrument inputs offer selectable gain pads, 60dB of continuous analog level control, and can be separately assigned for simultaneous dual-mono recording. Construction quality is above and beyond any iPhone recording accessory weve seen, including a casing made from anodized aluminum, and a 1/4-inch input from Switchcraft made from a nickel-plated brass.