Excerpt: Near-coincident pairing is an oft-used mic'ing technique for stereo recordings: two identical cardioid mics put close together, pointed at 90 degrees across one another. Now, shrink that whole principle down into one housing and attach it to your iOS device: et voilà the iXY.
This plug-in stereo mic for your iPhone or iPad is brilliant for high quality recordings
Good Gear Guide.au
20 December 2013
Summary: RODE’s iXY microphone for iPhone, iPod touch and iPad is a fantastic way to boost the quality of audio recordings. If you record your university lectures, do any interview work, or want a cheap way to boost your YouTube voice-overs, this is a reasonably cheap way to get good audio with the convenience of your smartphone.