How to make any serum preset sound wide and more stereo with 7 Skies. In this tutorial 7 Skies uses the Serum Matrix to randomize the panning of midi going into serum. This makes your preset instantly larger and wider without sounding like the signal is constantly moving like the Auto Pan audio effect has. Ableton 10 users can also apply this same trick within the Sampler instrument using a MIDI randomizer plugin. The autopan effect is an amazing way to spread out leads, plucks, pads, and percussions!