Roland GO:MIXER

The Roland GO:MIXER makes it as simple as possible to add great sounding audio to your smartphone video recordings. Featuring four 1/4″ inputs and two 1/8″ line level inputs, this smartphone mixer allows you to connect to your smartphone with the included cables and is made the default audio source for all the apps on your phone. This is an amazingly powerful small tool at a great price point! 

Check out this promo from Roland: