The Tone Keeper is a high-fidelity optical compressor based on Earthquaker Devices’ The Warden. It features six knobs to control the attack, release, tone, sustain, ratio, and level of the compressor. The internal charge pump allows the unit to be powered by 9V while still providing maximum clean headroom and sustain. The LED is a clear white, and the LDR should have around 2-3mm distance to the LED. The Tone Keeper is a great choice for bass guitar, as it can provide plenty of headroom and sustain without getting noisy. To get the most out of the compressor, start with all knobs at noon and adjust from there while switching the pedal on and off. With the Tone Keeper, you can get the maximum out of every note.

Summary created by AI from the original source.