On this episode of the Rock and Roll Geek Holiday Buying Guide, Michael and Sam take a look at something for the musician on your shopping list. It's the Guitar Jack 2 from Sonoma Wire Works . The Guitar Jack 2 is a microphone and instrument interface for iPad, iPad2, iPhone, and iPod Touch. Plug it in, and your ready to record using your favorite audio app, such as Sonoma Wireworks's FourTrack. Guitar Jack 2 is small enough to fit into the pocket of your jeans and it lets you plug your guitar or other instrument directly into your iOS devices via the 1/4" input, or plig in any stereo mic or line device via the 1/8" line input jack. It offers 60dB of continuous level control. You can record in stereo or simultaneous voice and instrument in mono, and there's also a separate 1/8" stereo jack for your headphones. It's 16-nit for now, but will get a 24-bit firmware update soon. Guitar Jack 2 from Sonoma Wire Works