When composer Jeffrey Brooks premiered The Memory Palace at Bang on a Can's summer festival at MASS MoCA in July 2023, he'd perfected the presentation of what we now know as the Stein-o-caster - a new form of prepared piano, fitted with pickups, that he conceived and designed the previous year with electronics engineer Greg Lee. As a featured instrument on two pieces from this new recording, the Stein-o-caster sets the tone for the aural atmospherics and soundscapes that transport the music into fresh dimensions of space and time. An artist of wide-ranging musical tastes, Brooks has also held a lifelong affinity for the electric guitar (Jimi Hendrix is a personal hero), so in the context of The Memory Palace, it made sense to approach longtime collaborator Mark Stewart - in-house guitarist for the Bang on a Can All-Stars, and musical director for Paul Simon's touring band - for a specially commissioned piece. This became "Santuario," scored for double-neck electric guitar, and a mini-epic of sonic exploration in it's own right.