3Leaf Audio Proton V3 Duke Envelope Filter Guitar Effects Pedal, Turquoise and Silver

The Proton is a modern homage to the classic Mutron III envelope filter. It has a wide frequency response that sounds great with every instrument. Version 3 has increased input sensitivity to work better with low-ouput instruments, and it adds a tone knob for variable control over the filter cutoff frequency.

Controls

Gain
Response of the filter to your playing dynamics. This should be adjusted based on the output of your instrument. Start with the sensitivity at minimum and turn up until the filter reacts to your liking.

Decay
The time it takes for the filter to sweep. Higher settings produce long, nautral envelope sounds, while lower settings produce quicker, more “bubbly” envelope sounds.

Sweep
Direction of the filter’s sweep. In the up position, the filter sweeps normally. In the down position, the sweep is reversed. You may need to change the settings of the gain and decay knobs; settings that work in the up position won’t always work well in the down position.

Peak
The “wetness” of the filter sound. Higher settings produce a more aggressive sweep with a sharper resonant peak.

Tone
The maximum cutoff frequency of the filter. It works like the tone knob of a guitar or bass. Higher settings will accentuate the treble frequencies; lower settings increase the filter’s warmth.

Relay-based silent true bypass will automatically switch to bypass mode if power is lost.