OWL Pedal mkII


The OWL Pedal is an open source, programmable stage effects pedal, made for guitarists, musicians, hackers and programmers.

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SKU: owl-pedal-mkII Category:


The OWL Pedal is an open source, programmable stage effects pedal, made for guitarists, musicians, hackers and programmers. Users can program their own effects, or download ready-made patches from our huge online patch library.

Backed by an active community, our patch library boasts well over 300 patches, including phasers, flangers, glitchers, loopers, droners, delays, reverbs, crushers, folders, shapers, screamers, laughers and more. Without question, the OWL is the most advanced and versatile effects pedal around. It is powered by standard 9v DC (not included) or USB, and you don’t need to connect a computer to use it.

OWL Pedal Mark Two is the remake of a classic. Mark Two has more memory, more signal, and less noise, thanks to improved hardware specs. It also comes with a whole new firmware. This means not only that the OWL Pedal is back in production, but also that it is now better than ever.

What’s new in mkII:

  • STM32F439 High Performance Microcontroller
  • CS4271 High Performance Stereo Codec
  • 8 Megabyte Fast SDRAM Memory
  • 8 Megabyte Serial Flash Memory
  • OpenWare Firmware
  • Class Compliant 48kHz Stereo Audio Interface
  • Dual Footswitch / Expression Pedal Support
  • Dimming bicolour LED pushbutton
  • White knobs 🙂

Changing patches is now easier than ever. Simply select Bypass with the footswitch, press the pushbutton, then select from any of the stored patches using a knob. The LED pushbutton blinks to indicate which patch is selected.

Another important new firmware feature turns the OWL Pedal into a USB audio interface, as well as a stereo effects processor. You can seamlessly monitor, record, and play back a performance while using the pedal as a fully featured effects unit.




  • 48kHz sampling rate
  • 24 bit stereo codec
  • Powerful microcontroller:
    • 32 bit ARM Cortex M4
    • 256 Kilobyte RAM, 1 Megabyte Flash memory
    • Integrated DSP, FPU, DMA
  • 8 Megabyte SDRAM memory
  • 8 Megabyte NOR Flash memory
  • USB Audio


  • Two 1/4inch Audio Inputs
  • Two 1/4inch Audio Outputs
  • Configurable Expression Pedal / Footswitch Input
  • Micro USB Connector
  • 9v DC Connector

Open Hardware

The OWL Pedal is Open Source and Open Hardware, published under the Gnu GPL.
Code and schematics are available on OpenWareLaboratory.


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