They are announcing an open house for their state of the art sound stage known as The Sigma Sound Stage. This open house will take place on March 31st, 2011 4pm to 7pm. Sigma Sound Stage, Philadelphia invite Sigma Sound has amassed over 200 gold and platinum records from some of the greatest entertainers in the world. Some of the most notable include, The Jackson 5, , , and Bonnie Raitt. March 25, 2011 Founded in August 1968, the studio opened its doors for business and soon became a leader in cutting edge recording technology. Instantly, hit records were being produced and recorded, earning Philadelphia and Sigma Sound Studios its place in music history. Sigma became the home of The Sound of Philadelphia with the help of Gamble and Huff...Since this golden era, Sigma Sound has amassed over 200 gold and platinum records from some of the greatest entertainers in the world. the most notable include David Bowie, The Jackson 5, Madonna, Lou Rawls, Billy Joel and Bonnie Raitt. Some of Philadelphia's hometown greats that have also contributed to Sigma's legacy greats include, , The Roots, , Boyz II Men and Jill Scott. The owners of Sigma Sound are inviting members of the press as well as industry insiders to view the sound stage which can also be used as a venue/event space...The venue space also boasts an incredible sound system consisting of a Yamaha M7CL48-ES Digital Console, EV QRX loudspeakers, Shure wireless mics, Pioneer and Rane DJ gear. The Lighting system inside the Sigma Sound Stage has State-of-the-Art lighting design with Avolites Pearl lighting console and martin Mac 250 moving lights. The event space has already hosted events for music artists like Nicki Manaj, Trey songz, Kerry Hilson and was the event space for several charity events like The Moyer Foundation Merry Happy Happenings fundraiser in December of 2010. The Sigma Sound Stage was also the home of The Philadelphia Film Festival's industry hub in October 2010. The Open House is an opportunity for industry insiders of the press as well as music, special events and film/TV to view the space and take a tour of the historic studios. They will be serving lite bites and refreshments from Dulce Vida Tequila , an organic 100 proof Tequila and Swanky Bubbles , a Sushi and champagne Bar in Philadelphia.