In June, prog-rock powerhouse Umphrey's McGee will release Jimmy Stewart 2007 - an ambitious double-live album comprised of some of the band's most inspired improvisations, sequenced into two seamless 70-minute "mixtapes." Several times each performance Umphrey's McGee delves into the "Jimmy Stewart" creation process. They aim to generate melody-rich, spontaneous compositions, utilizing a Zappa-inspired language of body gestures and hand-signals which allow the band to create structure on-the-fly.