Generating additional magnetic fields independently from the MR scanner’s hardware requires additional controllers, current amplifiers and DC coils. Here we present the design and implementation of a 64 channel arbitrary gradient waveform controller that can be used to drive current amplifiers with analog inputs. We describe the controller’s architecture and how sequences are developed. We will also discuss the important criteria needed to synchronize the waveforms with the MR scanner. Finally, we will show the completed controller and the first MR result.