 It can record audio from the built-in microphone of the device it's running on, or access the microphone input from the headphone input jack.There are a variety of hardware options for recording through the headphone input jack, including using iPhone specific DI units like the IK Multimedia iRig, Peavey AmpKit LiNK and the PRS Guitar Bud.This input is also accessed by the Apple iPhone headset as well as a Camcorder AV cable connected to a mixer or mic preamp.