The Oberheim SEM was one of the world’s first self-contained synthesizer modules. It was primarily developed as a convenient solution for musicians who wanted to set up sequences without tying up their main synths. The SEM also worked very well as an expander to fatten up the tone of other synthesizers like the Minimoog™ or the ARP Odyssey. Arturia's re-creation for the iPad, iSEM, tips its hat to the familiar interface of the classic 1974 Oberheim SEM, but there's more than meets the eye. They've added a few new features and some of the extra functionality that people have come to expect from Arturia products.