PRS Cables Guitarbud Audio Interface Plug your guitar or bass directly into your iPhone / iPod Touch along with headphones Works with Voice Memos, StompVox, Multitrack Mixer, Guitar Toolkit, iStrobosoft, and many others (trademarks are the property of their respective owners) Guitarbud  the guitarists interface, basically replaces your iPhones built in mic with the direct output of your guitar. Use your guitar with any app that your mic worked with Requirements - iPhone OS 3.0 or later and iPod touch 2nd Gen OS 3.0