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Description
hpf pedal Pigtronix Resotron Envelope Filter Pedal – Chicago Music ExchangeCondition: Item is subject to minor cosmetic imperfections. Packaging may be in poor shape. From Pigtronix: Pigtronix Resotron is an analog filter that brings the sound of 70s keyboard synthesizers to the world of envelope pedals for guitar, bass and beyond. The filter at the heart of the Resotron is based on the SSM2040 chip found in the legendary Prophet 5 and Octave CAT synthesizers. This 24db octave, state variable filter provides the full gamut
Condition: Item is subject to minor cosmetic imperfections. Packaging may be in poor shape.Pigtronix Resotron is an analog filter that brings the sound of 70’s keyboard synthesizers to the world of envelope pedals for guitar, bass and beyond. The filter at the heart of the Resotron is based on the SSM2040 chip found in the legendary Prophet 5 and Octave CAT synthesizers. This 24db/octave, state-variable filter provides the full gamut of familiar envelope filter sounds with UP and DOWN sweeping modes, and a sensitivity control to dial in the response of the effect based on how hard you play.
In addition to these vintage-correct filter tones, the Resotron pushes the envelope pedal concept to a whole new level by using an analog pitch-tracking system to move the cutoff frequency of the filter up and down. The pitch-following filter effect found in the Resotron moves around based on the notes you play instead of how hard you play. The attack time and rate of filter motion can be adjusted—using the GLIDE knob—to dial in how long it takes for the cutoff to travel between pitches.
The Resotron has the ability to operate in Low Pass, Band Pass or High Pass modes. Each of these filter voices has a distinctive character that can be manipulated by adjusting the PEAK knob, progressively feeding the filter back upon itself to increase the resonance (or “Q”) of the filter, right up to the point of self-oscillation. A push-button OSCILLATE function allows you to go even further—turning the Resotron into an analog synthesizer pedal that follows both the pitch and dynamics of your playing. The synthesizer sounds created by the Resotron can be radically altered by switching between the LPF, BPF and HPF modes. This allows users to access waveforms that range from subtle voice emulations to bombastic, aggressive lead sounds, as well as ultra-smooth sub bass tones.
Before the pedal’s input signal hits the Resotron’s filter, it passes through an optical compression stage derived from the Pigtronix Philosopher’s Tone pedal. The increased volume and punch from this compressor can then be mixed into the audio signal using the BLEND control—without affecting the SENSITIVITY of the envelope. Resotron accepts active CV and passive TRS expression pedal inputs for foot-controlled filter sweeps and outboard modulation, which is mixed in parallel with the on-board pitch-following and amplitude tracking systems.
- 24db/oct Filter based on the SSM2040 chip
- Low Pass, Band Pass & High Pass Filter options
- Velocity controlled UP & DOWN envelope modes
- Pitch Following envelope function with variable GLIDE
- BLEND control mixes in Philosopher’s Tone compression
- Expression pedal / 0-5V CV input modulates CUTOFF
- OSCILLATE mode for monophonic synth sounds
- Sidechain TRIGGER input for external audio
- Hardwired True Bypass Switching
- 18VDC Power Supply Included
- 100% Analog Design
- Circuit Design by Nick Cote
- Sound Design by David Koltai
Please Note: The item displayed in the images may not be the actual item you receive.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.4 ★★★★★
Based on 2321 reviews
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Product Reviews
★★★★★ 5
Small But Mighty — The Best Travel Jewelry Case I’ve Ever Used
Color: Glitter White
This Hatori travel jewelry box is honestly the best little jewelry organizer I’ve ever owned. I don’t know how it works its magic, but it somehow fits so much jewelry and still looks tiny and compact. Go figure.
Size & Portability:
It’s the perfect size—small enough to toss into a suitcase, carry-on, or even a purse, but big enough to hold everything I need for a trip. Lightweight, sturdy, and it takes up almost no space.
Storage Layout:
The double-layer design is genius.
Bottom: 7 ring rolls + 3 removable compartments (I love that I can move them around depending on what I’m packing).
Top: 5 hooks and an elastic pocket to keep necklaces from tangling—YES, it actually works.
Everything stays in place, nothing gets tangled, and it looks beautifully organized when you open it. A travel miracle.
Quality:
The glittery white PU leather exterior is sturdy and cute, and the interior is lined with soft velvet that protects everything. The clasp is easy to use and feels secure—no accidental openings in your suitcase.
Why I Love It:
It’s compact, durable, organized, and honestly just adorable. Perfect for travel, but also great for keeping your everyday jewelry together in a drawer.
If you travel at all—or just like your jewelry organized—this little box is worth every penny. It packs a punch for its size.
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Reviewed in the United States on November 27, 2025
★★★★★ 5
Great box for traveling or your safe!
Color: Black
The Travel Jewelry Box is a must-have accessory for anyone who loves to accessorize on the go. This compact yet versatile organizer is the perfect solution for keeping your favorite jewelry safe, secure, and tangle-free while you travel.
Let's start with the design. The Travel Jewelry Box is intelligently crafted to maximize space without sacrificing functionality. Despite its compact size, it features multiple compartments, pockets, and hooks to accommodate a variety of jewelry pieces. From earrings and rings to necklaces and bracelets, there's a dedicated spot for everything, ensuring that your jewelry stays organized and protected during transit.
Durability is another standout feature of this jewelry box. Constructed from high-quality materials like faux leather or sturdy fabric, it's built to withstand the wear and tear of travel. The exterior provides a layer of protection against bumps and scratches, while the interior is lined with soft velvet or plush fabric to prevent your jewelry from getting damaged.
One of the things I love most about the Travel Jewelry Box is its versatility. Whether you're jet-setting across the globe or simply heading out for a weekend getaway, this compact organizer is the perfect companion. It easily fits into your carry-on luggage, purse, or backpack, ensuring that your precious jewelry is always within reach. And with its sleek and stylish design, it adds a touch of elegance to your travel ensemble.
But perhaps the best part about the Travel Jewelry Box is its practicality. It's designed with the traveler in mind, featuring thoughtful details like a secure zipper closure, removable compartments, and a compact size that fits easily into any travel bag. No more digging through tangled necklaces or searching for lost earrings – with this jewelry box, everything has its place, making it easy to find and access your favorite pieces whenever you need them.
In conclusion, the Travel Jewelry Box is a game-changer for anyone who wants to travel in style without sacrificing the safety and organization of their jewelry. With its smart design, durability, versatility, and practicality, it's a must-have accessory for jet-setters, weekend warriors, and anyone in between. Trust me, once you experience the convenience of the Travel Jewelry Box, you'll wonder how you ever traveled without it!
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Reviewed in the United States on May 29, 2024
★★★★★ 4
Great travel jewelry case
Color: Black
Great colors. Good size. Easy to pack and carry. Fits a good amount of jewelry. It’s decent quality. I know there is better out there but for the value it’s great. It snaps close and I haven’t had mine accidentally come open at all. The inside is soft. My necklaces did get a little tangled inside but not too bad. I could have put them in there better. Very nice though.
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Reviewed in the United States on January 21, 2025
★★★★★ 5
Store it all!
Color: Pink
This is a compact, light weight, efficient, and sturdy/convenient way to securely store jewelry. The small compact case allows jewelry from earrings to necklaces to bracelets and rings to be all together without being tangled and/or on top of each other. I have more earrings than rings so I used the ring area to store the rest of my earrings. The tight clasp allows the lid to be fasten snuggly to the body of the case. The price was right considering what other stores were charging. I chose the pink case which is a very soft pink, as like the case, but there are other colors to choose from. The case is mobile and would stand strong in a carry on case or bag. I highly recommend this item if you are looking to organize and have your jewelry neatly and safely all in one place!
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Cute and super convenient for travel
Color: Black
Really happy with this jewelry box overall. It’s compact, lightweight, and perfect for travel. The compartments are well designed for rings, earrings, and even long bracelets, which fit really nicely.
The only downside for me is the necklace section. When using multiple necklaces, they can get tangled, so it’s not the most practical part of the case. Other than that, it’s a great product for the price and looks very cute
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Reviewed in the United States on April 23, 2026