The Moog Modular Model 15 is a highly sophisticated modular synthesizer and dynamic analog instrument consisting of 14 hand-crafted modules housed in a rugged tolex-encased cabinet and designed for live performance and portability. Each module is hand-built to the original 1974 factory specifications by stuffing and soldering each component by hand to the circuit board and using traditional wiring methods. Providing an unlimited number of sonic possibilities, the system offers a number of voltage-controlled modules including oscillators, filters, envelopes, amplifiers, and signal generators.