The GR2 Envelope Filter is a pedal from 3Leaf Audio that produces the automatic, dynamic wah-style sweep of an envelope filter: the filter opens and closes in response to how hard you play. Thomas "MarloweDK" Risell, demonstrating it in a video for No Treble in October 2010, called it "a great little pedal that offers a lot of possibilities"1.
Reviewers have received the GR2 well: Premier Guitar called it "a great little pedal that offers a lot of possibilities"1.
What it does
As an envelope filter, the GR2 tracks the attack and volume of your playing and sweeps a filter accordingly, giving the percussive, vowel-like "quack" associated with funk bass and filtered guitar sounds. The depth of the effect depends on picking dynamics: play harder and the filter opens further.
How it was demonstrated
Risell's No Treble test drive used a bass-focused signal chain, which gives an idea of how the pedal sits in a rig1:
- Bass: Sandberg California JJ
- Strings: Dunlop Nickel plated Medium gauge 45-105
- Amp: TC Electronic RH450 with a TC Electronic RS410 cabinet
- Recording: MacBook with an Apogee Duet soundcard into Logic Audio Pro 8, filmed on a Creative Vado HD 3rd generation (video only)1
His verdict on the pedal overall: "This is a great little pedal that offers a lot of possibilities1."
"This is a great little pedal that offers a lot of possibilities."
Videos
JetCityMusic
gearmanndude
Bass Gear Magazine
Questions
Is the 3Leaf Audio GR2 still available?
No. 3Leaf Audio introduced the Wonderlove Envelope Filter in June 2012 as the GR2's replacement, with preorders at $269 and shipping at the end of that month. The Wonderlove itself was updated in October 2015 alongside a new Proton, with the next-generation Wonderlove listed at $299 and the Proton at $229.
Sources (1)
- MarloweDK: GR2 Envelope Filter Test Drive, No Treble, 2010-10-12
