Gray was found dead Monday in a suburban Iowa hotel room. The cause of death has not been reported, but the loss already sent fans and artists reeling.
Slipknot's most recent studio album, All Hope Is Gone, was released in 2008. The album was mixed by legendary English metal producer Colin Richardson.
Richardson's rep said this in a statement: "[Colin] is a true fan to the core and sends his love and condolences to everyone in Slipknot and their camp."
"I'm so crushed to hear about the passing of Paul Gray," Shadows Fall singer Brian Fair told MTV News. "I had the pleasure of first getting to know him on a press trip to New York City before our tour with Slipknot and Lamb of God in 2005."
R.I.P. Paul Gray (1972-2010).
"I had the pleasure of sharing stages with him around the world. A great musician, an underrated songwriter and a truly warm soul underneath the evil mask he rocked onstage, this is a huge loss to the metal world. He will be missed deeply."
Another band Richardson has worked with, legendary thrashers Sepultura, took to the Internet. "RIP Paul Gray, we're shocked and very sad," current members Paulo Pinto Jr., Andreas Kisser, Derrick Green and Jean Dolabella said in a joint statement.
The boys in Nonpoint were on Ozzfest with Slipknot back in 2001.
"I am deeply saddened to hear and read about the death of Paul Gray," drummer Rob Rivera said. "To all in Slipknot and in Paul's family, Nonpoint send all our love, condolences and prayers. You will be missed by all your friends and fans."
"Rest In Peace my metal brother."
