DJ Rig for iPad

For years, IK Multimedia has been making tools for musicians with popular products like T-Racks and the iRig guitar adapter. Now the firm is dipping its toes into computer vision with a gesture-based music creation tool called iRing.

It seems every year’s projected to be “The year of (…),” but if 2012′s any indication, ’13 will lead a new mobile movement. M-commerce Black Friday sales surpassed $1 billion for the first time last year, while 1.2 billion apps were downloaded during the 2012 Christmas week. With tablet sales projected to reach 450 million in three years, the move towards digital means even the tech savvy music world will see a mobile makeover....

This week’s roundup of iOS apps is all about the multimedia entertainment: We’ve got video, we’ve got music, we’ve got games, and we’ve got the brain of Albert Einstein....