Three Knobs, Three Charts: Seeing What an Overdrive Pedal Is Doing
Guitarists already know what Drive, Tone, and Level sound like. In this video, I use a Nobels ODR-1 to show what those familiar changes look like in the measurements.
Output-versus-input, THD-versus-input, and frequency-response plots reveal how each control affects output level, saturation, and tonal balance—and where those controls interact.
The measurements are displayed using DriveViewer and BodeViewer, two Python tools I developed around the QuantAsylum QA403.
The goal is simple: connect what we hear with what the pedal is actually doing.