for the robotic instruments PAM, modular percussion and percussive aerophone (built by WPI’s MPR Lab and EMMI)
by Scott Barton
A groove changes identity depending on the tempo it inhabits. Typically, there are small ranges within which a rhythm feels at home. Once there, a rhythm reveals the energy, detail and character of its true self. Some rhythms are travelers, able to assimilate into contrasting locales. Some rhythms are chameleons, changing their colors depending on their temporal context. tempo macho explores some of the ways that tempo change can affect our sense of musical material. Here, tempos can change gradually and also can shift abruptly according to a variety of mathematical ratios. These movements occur over a range of time scales to illuminate the rhythmic limits of short-term memory and what is required to entrain to a cyclic pattern that reveals a groove. A theme persists throughout the piece to make these rhythmic aspects, which also include unusual meters and polyrhythms, clear. The temporal complexity of these ideas finds a natural voice through mechatronic instruments.