Outline’s Butterfly System Helps Prog Titans Celebrate Milestone Album In Washington

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Outline’s Butterfly System Helps Prog Titans Celebrate Milestone Album In Washington   Washington DC — Dean Mattson mixes FOH for progressive rock pioneers Yes and is currently out with them as they celebrate the 50th anniversary of their seminal Close to the Edge album with an extensive tour. The production recently visited (Nov 13th, 2022) […]