Milwaukee-born guitarist Greg Koch, affectionately dubbed the 'Gristlemaster', is widely regarded as a guitarist’s guitarist. Praised by legends like Joe Bonamassa as 'scary good', Koch has released over two dozen albums, authored best-selling instructional books for Hal Leonard, and amassed over 50 million views on his gear demonstration videos for Wildwood Guitars. He is also known for his instrument collaborations, including his signature Reverend Gristlemaster guitar and Fishman pickups. Formed in 2017, the Koch Marshall Trio is an instrumental organ trio featuring Greg Koch on guitar, his son Dylan Koch on drums, and Hammond B3 organ specialist Toby Lee Marshall. Their music blends a heavy blues sensibility with rock, funk, jazz, and country, driven by deep grooves, improvisational interplay, and a trademark sense of humor.

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