If your iPad or iPhone is set to play a starring role at your next, sold-out concert, you may want to check out two new, iOS-friendly interfaces from New Signal Process. Pictured above is NSP's BreakOut Stomp -- a die cast aluminum-encased pedal that promises to transmit guitar signals to and from your iDevice, without any unwanted distortions or detection interference. All you have to do is slide the stompbox into your pedal board, hook it up to your iPhone's headphone jack and fire up your favorite recording or mixing