Description Get the song: bit.ly Buy on Amazon: bit.ly Share on Twitter: bit.ly -- Today, we at A Cappella Records are GLaD to announce a partnership with Aperture Science. To celebrate, a few members of our team invoked the concept of songs solely created by the human voice. And various robotic enhancements. The video involves a cappella music. It is designed to see how test subjects react to a cappella music. Featuring vocalists: Liz Baseman, Rachel Dolkas, Matt Forman, Cody Shough. Composed by: Mike Morasky Arrangement: Sebastian Wolff, Matt Forman, Tom Anderson ( Sheet music available here for free. Free as in, free potatoes: sebastianwolff.info ) Recording by: Charlie Forkish Mixing by: Dave Sperandio Produced by: Sebastian Wolff & A Cappella Records Special thanks to Chris Crawford, Peter Hollens A Cappella Records is not affiliated with Valve. Portal and Portal 2 are registered trademarks of the Valve Corporation. A Cappella Records www.acappellarecords.com