SoftDrive GV is a free VST virtual-analog model of the Marshall “Guv’nor” and “Guv’nor GV-2 Plus” guitar distortion effects.
The Guv’nor is a solid-state distortion pedal first issued in 1989 to recreate the sound of a cranked up Marshall stack in a small stomp-box format. It became rather popular in the 90’s and is still used widely nowadays for its quality high-gain sound and a its tonal versatility. It was re-issued in the early 2000 in an updated housing and incorporating a new “Deep” control to mimic the effect of a JCM2000’s “Deep” switch.
This VST model is a tribute to the original effect and models the circuits of both the “vanilla” Guv’nor and its modern GV-2 variant.
SoftDrive GV expands on the original design and brings in new possibilities unthinkable of outside of the digital realm.
The overall effect structure is as follows:
- Input Filter
- OpAmp A (gain, filtering, clipping)
- OpAmp B (gain, filtering, clipping)
- ToneStack (LED clipping, filtering)
- Deep circuit (filtering)
- Output Filter (attenuation, filtering)
Each stage is modeled separately and using different techniques. A care is taken to make sure that no inter-stage dependency is lost during the decomposition.
The input filter is a simple high-pass filter digitized with Bilinear Transform.