Audio Interfaces for iPad: The 9 Best Interfaces | CrumplePop
Focusrite ITRACK SOLO LIGHTNING USB Audio Recording Interface For iPad/Mac 815301008330 | eBay
Interface Presonus Audiobox iTwo USB 2.0 / iPad : Presonus: Amazon.ca: Musical Instruments, Stage & Studio
Amazon.com: UA Volt 2 USB Audio Interface for recording, podcasting, and streaming with essential audio software, including $400 in UAD plug-ins : Everything Else