ERD ModularERD/TOAD Analog Computer

ERD Modular ERD/TOAD

ERD/TOAD from ERD is an analog computer for Eurorack modular synthesizer systems, combining a bevy of voltage mathematics to model many different realities, both real and imagined, through electronic analogies which excite rare tones and processes. Ignoring its many normalizations, the elements of TOAD constitute three voltage multipliers which are summed with two additional right hand signals, which are fed to three switched capacitance integrator cells. In addition to these, two inverters offer simple signal flipping, while signum and square operators introduce nonlinear behaviors to any greater function you patch together.

Patching these mathematical elements together, you can create all sorts of functions which can serve as simple utilities or combined to model complex behaviors. Right out of the box, ERD/TOAD is normalled to create Gabriel B Mindlin's differential equation, which uses feedback processes to model the behavior of birdsong production in a bird's syrinx. Simply patch a changing voltage source to all of the integrator clock and CV inputs, and find these surrealist chirps and guttural honks at each integrator output group.

If all this sounds absurdly complicated, do not despair! For geomantic experimentation is ERD's specialty, and each ERD/TOAD comes with a comprehensive manual which will both inform and inspire you towards your own ritualistic engagements with voltage math. Create untamed oscillations and filters according to J. C. Sprott's chaotic equations, or simply patch with abandon to sniff out irrational synthesizer songs through wandering connectivity. Whatever experiments you're interested in, ERD/TOAD excels when paired with some useful utilities like additional VCAs, logic, and other voltage processors, especially those from the rest of ERD's geomantic toolkit. Get your geomantic exploration underway alongside the most venomous of mechanic toads, with ERD/TOAD from ERD.

ERD/TOAD Features

• Analog computer module with multiple voltage math utilities
• Normalled to create Gabriel B Mindlin's model of avian sound production
• Create surreal electronic bird chirps and gurgles with a single CV signal, or patch functions together to create other processes
• Capable of creating J.C. Sprott's chaotic equations
• All functions include three switched capacitance integrators, square function, three inverters, signum function, and seven multipliers (some elements combined within functions)