bitbox mkII / custom firmware Browser-local

UNOFFICIAL COMMUNITY PATCH · MKII ONLY

Custom firmware.
Patched in your browser.

Start with official 2.3.4. Add waveform zoom, a screen saver and more—your firmware stays on your computer.

Watch the video overview
OFFICIAL2.3.4 CUSTOMIZED2.3.4+c

Make your patched firmware

Download official bitbox mkII 2.3.4, extract the archive, then choose its BITBOXMK2.bin file below.

Before reflashing: back up your entire microSD card—including projects, samples and presets—to another drive.

or drop the extracted .bin here

Official 2.3.4 · 674,896 bytes

Choose a file to begin. Its contents, not its filename, determine whether it is compatible.
  1. Verify originalMatch the official 2.3.4 SHA-256Waiting
  2. Apply customizationsBuild a separate file in browser memoryWaiting
  3. Verify resultMatch the exact 2.3.4+c SHA-256Waiting

VIDEO OVERVIEW

See the patch in action.

A hands-on overview of the firmware changes, demonstrated on the Bitbox MkII.

Watch on YouTube

The player connects to YouTube only when you load it. Your firmware stays in the patcher.

Bitbox MkII · 2.3.4+c

AFTER DOWNLOADING

Install on your Bitbox MkII

See your Bitbox MkII manual for the full flashing procedure. Back up your card before updating.

The exact name matters. The patched file on the SD card must be named BITBOXMK2.bin. If your Downloads folder already contains that name, your browser may add (1), 1 or another suffix. Rename the patched download before copying it.

  1. Copy the patched file. Place BITBOXMK2.bin in the SD card’s root directory, outside any folder.
  2. Insert the card with the unit powered off. Hold INFO while powering on, then release INFO when the upgrade message appears.
  3. Wait for the automatic reboot. Allow about 30 seconds and leave power on until the update finishes.
  4. Confirm 2.3.4+c. Press HOME until the Menu screen appears. The version is in its lower-right corner, and also at the top-right of Tools.

RETURN TO STOCK

Return to official firmware

To remove the customization, reinstall the original firmware using the same update procedure. Back up your card before reflashing.

Download and extract official Bitbox MkII 2.3.4. Use its original, unmodified file directly.

  1. Replace the patched file on the SD card. Copy the original firmware to the card’s root directory, replacing the patched file. Its name must be exactly BITBOXMK2.bin.
  2. Power off and insert the card. Hold INFO while powering back on, then release INFO when the upgrade message appears.
  3. Wait for the automatic reboot. Allow about 30 seconds and leave power on until it finishes. Confirm 2.3.4 in the lower-right corner of the Menu screen.

A note from the author

I’ve tested this modification thoroughly, and it works as intended on my own Bitbox MkII. I’m sharing it “as is,” without any warranty. You install and use it at your own risk. To the extent permitted by applicable law, I accept no liability for any damage to your hardware, or for loss or corruption of projects, samples, presets or other data, arising from its installation or use.

Checksums & compatibility

Only the exact official bitbox mkII 2.3.4 image is accepted. Other versions, models, ZIP archives and already patched files are rejected. Both hashes must match before a download is offered.

Original · 2.3.4 · SHA-256
35ab7995ad0eca8484f3b28bc76389f10b2037dbb21a4a394e950d9329073e86
Patched · 2.3.4+c · SHA-256
5fce58174b7b76884c0dc9b0dc5eed51975193fb3aa3fe9ed310bd8ce4f1273b

The patcher uses your browser’s SHA-256 implementation. Use an HTTPS address or a local preview server if your browser cannot verify files from a downloaded page.