Pricing and availability

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Average Price: $106

Standard/Professional

$70

$251+

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Price History

Based on price data from 1 merchant for "One Control Butter Yellow Auto Quack". Prices shown reflect NEW condition. Tracking began Apr 25, 2026.

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Description

Unleash the power of funk and groove with the One Control Butter Yellow Auto Quack. This compact filter effects pedal is a must-have for electric guitar and bass players seeking to add a dynamic envelope filter or auto-wah sound to their arsenal. Designed by the legendary Bjorn Juhl, this pedal delivers precise tracking and a fast response, ensuring that every note resonates with clarity and punch.

What makes the Auto Quack stand out is its versatility. With two selectable filter ranges—flat and narrow, or high and wide—you can tailor your sound to fit any genre or playing style. The side-mounted mellow/bright switch offers further customization, letting you shift the tonal character on the fly.

Featuring true bypass, the pedal preserves your instrument’s natural tone when not in use. Controls for bias, decay, and sensitivity give you full command over your sound, allowing for both subtle and dramatic effects. Constructed with durable aluminum housing and equipped with a status LED, this pedal is built to withstand the rigors of the road.

Key Features:

  • Envelope Filter / Auto Wah for electric guitar and bass
  • Designed by Bjorn Juhl
  • Two selectable filter ranges: flat and narrow or high and wide
  • True bypass with precise tracking and fast response
  • Controls for bias, decay, and sensitivity
  • Side mellow/bright switch for filter range selection
  • Durable aluminum housing with status LED
  • 6.3 mm mono jack input/output
  • Power supply via 9V battery or optional 9V DC power supply (not included)
  • Power consumption: 3.5 mA

Product specs

Available since April 2021
Effect Types Auto Wah

FAQs

What kind of sound effect does the One Control Butter Yellow Auto Quack produce?

The One Control Butter Yellow Auto Quack produces an auto wah effect, which dynamically filters your guitar signal to create a quacking sound that responds to your playing dynamics.

Is the One Control Butter Yellow Auto Quack pedal suitable for bass guitar?

Yes, the One Control Butter Yellow Auto Quack can be used with bass guitars, providing a dynamic auto wah effect that enhances lower frequencies without losing clarity.

Does the One Control Butter Yellow Auto Quack require a specific power supply?

The One Control Butter Yellow Auto Quack operates on a standard 9V DC power supply, which is typical for most guitar pedals.

How does the One Control Butter Yellow Auto Quack differ from a traditional wah pedal?

Unlike a traditional wah pedal that requires manual foot control, the One Control Butter Yellow Auto Quack automatically adjusts the wah effect based on your playing dynamics, offering a hands-free experience.

Can the One Control Butter Yellow Auto Quack be used in a pedalboard setup?

Yes, the compact design of the One Control Butter Yellow Auto Quack makes it ideal for inclusion in a pedalboard setup, providing easy integration with other effects pedals.

Mike Hermans

Mike Hermans

ONE CONTROL BUTTER YELLOW AUTO QUACK

Video thumbnail for ONE CONTROL BUTTER YELLOW AUTO QUACK by Mike Hermans

ONE CONTROL BUTTER YELLOW AUTO QUACK

Mike Hermans

Mike Hermans

Video thumbnail for PBA No.17 One Control BUTTER YELLOW AUTO QUACK | Sakamoto Natsuki by LEP INTERNATIONAL

PBA No.17 One Control BUTTER YELLOW AUTO QUACK | Sakamoto Natsuki

LEP INTERNATIONAL

LEP INTERNATIONAL

Video thumbnail for One Control Butter Yellow Auto Quack - Demo By Hans Johansson by Hans Johansson

One Control Butter Yellow Auto Quack - Demo By Hans Johansson

Hans Johansson

Hans Johansson

Video thumbnail for One Control Butter Yellow Auto Quack - Demo by Erik Holmbom by Erik Holmbom

One Control Butter Yellow Auto Quack - Demo by Erik Holmbom

Erik Holmbom

Erik Holmbom

Video thumbnail for One Control Butter Yellow Auto Quack - BJFe Design by Visual Guy

One Control Butter Yellow Auto Quack - BJFe Design

Visual Guy

Visual Guy

Video thumbnail for One Control Butter Yellow Auto Quack by Jack Fossett

One Control Butter Yellow Auto Quack

Jack Fossett

Jack Fossett

Reviews

PROS

  • Excellent tracking for smooth, funk-driven riffs

  • High-quality build with durable components

  • Three knobs provide extensive sound customization

  • Enhances dynamic playing with Bias, Sens, and Decay controls

  • Compact design fits easily on pedalboards

  • Provides a rich auto-wah sound across different guitar types

CONS

  • Signal boost issue due to lack of volume control

  • Knob labels are difficult to read

  • Mellow/Bright switch awkwardly placed near output jack

  • Some settings can overly attenuate the signal

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about One Control Butter Yellow Auto Quack.

Features and functionality

  • The One Control Butter Yellow Auto Quack is noted for sounding good on guitar and electric mandolin but not delivering well on bass despite optimization claims.

    Source

User experience

  • An owner plans to replace the Butter Yellow Auto Quack due to its limitation with bass, indicating a preference for more versatile envelope filters like the Mu-Tron Micro-Tron IV.

    Source

Value and pricing

  • A user suggests checking Reverb for deals, having purchased a barely used Butter Yellow Auto Quack for $85 shipped.

    Source

Comparisons

  • Former owners of Mutron III and Lovetone Meatball indicate disappointment with the Butter Yellow Auto Quack's performance as an envelope filter.

    Source

Use cases and applications

  • The pedal is recommended for guitar users with a mini board setup, offering good performance for smaller, portable configurations.

    Source

Critic Reviews

New Pedals: One Control Butter Yellow Auto Quack | Delicious Audio

delicious-audio.com

One Control's Butter Yellow Auto Quack shines as a versatile envelope filter, ideal for funk guitarists craving dynamic control over their sound. Its intuitive controls—Bias, Mellow/Bright switch, Sensitivity, and Decay—offer a broad range of tonal possibilities, allowing players to craft everything from subtle sweeps to aggressive wah tones. The design is well-executed, making it an excellent choice for those looking to enhance their playing style. However, some users may find the sensitivity settings a bit finicky, requiring careful adjustment to achieve optimal performance. Overall, this pedal delivers impressive results for its compact size, making it a worthy addition to any pedalboard.

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