KO II firmware history

The easiest way is Teenage Engineering's browser-based updater: connect your KO II via USB and visit teenage.engineering/apps/update. You can also download the firmware file from the official downloads page and copy it onto the device in firmware update mode.

• fix: crash when cropping long samples.
• fix: GROUP+PAD shortcut broken in TEMPO.
• fix: choppy USB audio when streaming from android devices (e.g. Pixel 9).

• summer update - full release notes here

• improved audio stability to reduce glitches.
• restored SYNC OUT continuous clock output.
• fixed: bug fixes and performance improvements for EP SAMPLE TOOL.
• fixed: various UI quirks related to faders, sampling, and chopping.
• fixed: turned-off LEDs could sometimes glow dimly.
• fixed: various MIDI bugs.

• OS 2.0.2 - this update focuses on workflow enhancements, new features requested by the community, and overall stability to make your K.O. II more reliable than ever.

• OS 2.0.1 touch-up's - full release notes here

• champions update - full release notes here

• double-trigger during quantized live recording.
• loop could exit to the wrong position when exiting and entering loop quickly.
• prioritize held notes over released notes when running out of voices.
• velocity and duration note changes (done with SHIFT + POT) could get lost.
• EP SAMPLE TOOL could not restore max length sounds.

• FX + GROUP solo group function did not mute MIDI notes
• auto chop improved when slicing long samples
• fader recording could erase fader events in other groups
• android USB MIDI connectivity resolved
• fixes corner case where sound got silent after exiting SAMPLE mode
• fixes crash when switching to 'sound 0' while playing
• fixes rare sample corruption after removing sounds

• fix scene switch crash.

• support for new backup/restore feature in EP SAMPLE TOOL
• when doubling pattern length with SHIFT + RECORD + PLUS, automatically copy the existing notes.
• press SHIFT + RECORD + PLAY to record from pattern start.
• press RECORD + ERASE + PLAY to record in overwriting mode.
• various bug fixes and UI improvements.

• while holding fader button, red leds will blink to show which fader functions have been tweaked
• hold erase+fader two seconds while stopped to reset all fader levels of the selected group and pattern
• group project volume are now reset when loading a project
• floppy icon enabled to show when data is being saved and will blink to indicate space is being freed up in the background after erasing a sound
• usb icon is now lit when there is a connection. icon blinks when there is activity
• tweaked envelope release and filter resonance
• fixed various stability problems
• fixed lost midi messages
• fixed chorus audio glitch
• fixed swapped left/right channels

• group filter (LPF/HPF) now has better range and more responsive punch-in
• handle midi note-on with velocity '0'
• fixed various errors and crashes

• support for EP SAMPLE TOOL
• press 'SHIFT + C, C' in sound mode to copy all pads in the active group
• hold LOOP (SHIFT + TEMPO) to set loop length on the fly
• 'SHIFT + A' finds next empty pattern
• hold MAIN during power-up to enter write-protect mode.
• various bug fixes and UI improvements
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