The Halls of Valhalla cartridge contains 8 original reverb algorithms, custom designed for the Z-DSP and the Eurorack environment. Voltage control over reverb decay, tone, and modulation allows the user to create reverbs ranging from small rooms to large halls to near-infinite decays.

The Halls of Valhalla brings the artifacts of fixed point digital signal processing to the forefront, resulting in a thickness and warmth that evokes the classic digital gear of the 1970s through the early 1990s. The goal of the algorithms is not to evoke physical environments, but rather to create unreal spaces that range from subtle to bombastic, from light to dark, with a lushness that turns simple input sounds into rich orchestral washes. The Halls of Valhalla brings the Valhalla DSP aesthetics into the hardware world: Minimalist interface, Maximalist sound.