3 Leaf Audio Proton V2 Envelope Filter Guitar Effects Pedal
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Version 2 of the Proton features the same classic sound as the
original, but adds a decay control, soft-touch relay true bypass, and it comes in a new custom enclosure. The Proton is designed to get a great sound without having to fiddle around with the controls, but you might find some helpful info here.
Controls how sensitive the filter is to your playing dynamics. If the gain control is all the way counter clockwise, the filter won’t open at all. Start there and turn it up until you reach the desired tone and response. The gain control is very powerful; where it is set will affect the filter’s attack and decay speeds, as well as the overall brightness.
Controls the resonance, or wetness, of the filter. Everything up to 12 o’ clock is on the subtle side. For the classic 70’s filter sound, set it between 12 and 3 o’ clock. Anything past 3 o’ clock is extra juicy and contains harsh resonant peaks, so use caution.
Controls the frequency range of the filter sweep. The up position is a brighter, more focused sound. The down position is a thick, juicy sound with a deep sweep.
The speed the filter closes as your note decays. Set around 3 o’clock for a Mutron-like decay. Set around 12 o’clock for a faster, more bubbly decay that grabs every note.
Controls the direction of the filter’s sweep. In the up position, the filter sweeps normally. In the down position, the sweep is reversed. You may find that the down sweep works best with the gain control cranked up a bit.
Use a 9-18v DC power supply with a 2.1 center-negative (Boss-style) plug. The Proton will draw up to 25mA of current. The Proton is protected internally against AC and reverse polarity supplies. Don’t use more than 18 volts!