Peter Erskine, Sheila E., Josh Freese, Charlie Bisharat, Jim Keltner, John “JR” Robinson, Curt Bisquera, Dennis Karmazyn, Natalie Leggett, Mark Adams, Matt Funes, Endre Granat, Armen Ksajikian, Irina Voloshina, Lisa Liu, Bernie Dresel, Steve Erdody, Roberto Cani, Josefina Vergara, Paula Hochhalter, Oscar Hidalgo, John Walz, Brian Dembow, Darius Campo, Andrew Shulman, Eun Mee Ahn, Drew Dembowski, Ana Landauer, Bruce Dukov, David Parmeter, Cecilia Tsan, Richard Altenbach, Phillip Levy, Katia Popov, Shawn Mann, Roger Wilkie, Michael Nowak, Maria Newman, Jon Lewis, Timothy Landauer, Andrew Duckles, Caroline Campbell, Alyssa Park, Satnam Ramgotra, Mike Valerio, Erika Duke-Kirkpatrick, Steve Holtman, Craig Gosnell, Daniel Kelley, Shalini Vijayan, Andrew Bain, Robert Brophy, Victoria Miskolczy, Nico Abondolo, Ben Powell, Eric Whitacre Singers, Amy Hershberger, Toss Panos, Scott Hosfeld, Trevor Handy, Belinda Broughton, Tina Guo, Alex Iles, Simone Vitucci, Serena McKinney, Aimee Kreston, David Walther, Rafael Rishik, Tereza Stanislav, Benjamin Jacobson, Andrew Bulbrook, Eric Byers, Radu Pieptea, William Booth, Luke Maurer, Julie Gigante, Doug Tornquist, Tamara Hatwan, Joel Pargman, Kevin Kumar, Teag Reaves, Laura Brenes, Mary Sloan, Jacob Braun, Steve Becknell, Jessica Guideri, Jenny Kim, Helen Nightengale, Geoff Osika, David Everson, Thomas Hooten, Gary Hickman, Dominic Lewis, Lisa Sutton, Philip Cooper, Thomas Harte, Tori Letzler, Xiaodan Zheng, Benjamin Powell, Benjamin Jaber, Phillip Keen, Neil Samples, Nicolas Philippon, Amy Rhine, Christopher Still, Evgeny Tonkha, Kevin Connolly, Sandra Cameron, Carrie Kennedy, Jeanne Skrocki, Steven Zander, John Dellinger, Darrin MC Cann, Ting Guo, George Kim Scholes, Stephen Dress, Edward Meares, William Reichenbach, Lukas Storm, Scott Sutherland tocaram na gravação de This Is My World.