A standard overdrive pedal reacts predictably in that the distortion it delivers goes up linearly in direct response to the guitarist’s volume and playing dynamics.
A little explanation is required: On a linear scale, a change between two values is perceived as the difference between those two values.
So the difference between 1 and 2 is the same as the difference between 9 and 10. The Lumberjack’s response is logarithmic and the change between two values is perceived as a ratio of those values. Therefore, a change from 1 to 2 (ratio 1:2) is perceived as the same as a change from 4 to 8 (ratio of 1:2).
The resulting overdrive is very reactive to the player’s volume and dynamics and its response ranges from a powerful clean boost to torn-speaker rasp and up to gritty distortion.
The control layout includes Volume, Log Factor and Boost knobs. Volume sets the overall output level of the pedal while Boost adjusts the input signal of the instrument.
The Log Factor controls the amount of logarithmic distortion.
Check out the video: