OP–1  OS updates

update directly from your web browser with our midi updater

or go through these steps:
1. access te boot.2. connect OP–1  via usb-c to a computer.3. press 1. the device will show up as a mass storage disk.








4. put the new firmware file on the disk and safely eject it.5. wait for the update to finish and follow the on-screen instructions.



 






note:

te boot is the bootloader in OP–1 . it loads and runs the firmware and is used for firmware updates and factory reset.








to access te boot:

1. turn OP–1  off.2. hold com while switching power
on to enter te boot.
OS
date
new update features:
1.6.7
2026.01.19
click to download

  • fix bug when lifting all tracks if first track is empty
  • fix mixdown containing residue from last recording
  • ensure count-in follows the tape speed setting
  • optimise multi-channel audio CPU usage when acting USB host
  • allow longer names when renaming presets
  • fix scrolling of long preset names 
  • prevent crash caused by invalid MTP folder names
  • allow clock to be set to "out" for BLE midi devices
  • fix not being able to set loop end to very end of tape
  • don't show blinking loop markers when out of range
  • fix jumping to last edge when it's at end of tape
  • fix flashing clip animation when doing "drop all"
1.6.5
2025.12.22
click to download

  • fix broken multi-track drop
  • fix tempo changing after boot
  • fix existing tapes getting offset markers and takes (due to tempo change)
  • fix unable to slide takes in small increments
  • fix crash when attempting to clone without a tape selected
  • fix some scenarios where tape pops would occur

1.6.2
2025.12.18
click to download

  • fix broken USB audio with certain combinations of USB mode and host operating system
  • fix tape pop when dropping a clip that was lifted from the start of the tape
  • fix bug with lifting clips from one track and dropping on another
  • add micro fade out when choking drums in the same drum group

1.6.0
2025.12.16
click to download

  • new amp synth engine with tuner
  • multi channel USB audio
  • random preset generator
  • tape crossfades after lift and drop
  • preset browser folder management
  • count-in recording
  • drum sampler release
  • outgoing midi clock over BLE
  • system setting: input signal safety
  • polish, bug and stability fixes

1.5.7
2024.05.08
click to download

  • USB audio enumeration fixes (solves audio exchange with OP-Z and more)





1.5.6
2024.04.30
click to download

  • support for audio class 2.0 usb devices
  • improved usb stability, latency and compatibility
  • option for selecting input channel(s) on usb audio
  • shift+T3 to clone in tape browser
  • shift+encoder click to center pan in mixer
  • merge drop (shift+drop) now uses clipboard mixer levels instead of active mixer levels
  • fix rare factory reset bug after power off with usb device connected
  • fix crash when recording to synth sampler after lift/drop samples
  • fix crash on startup when loading invalid tape settings file


1.5.0
2023.12.15
click to download

  • new effect: terminal
  • tape merge drop
  • bug fixes





1.4.7
2023.08.25
click to download

  • fix rare velocity bug with silent notes if playing 5 or more keys
  • fix noise when using certain targets with midi lfo
  • fix noise with recording via rec armed (out-in only)
  • fix dr.wave visual bug
  • fix dbox ui (black keys displayed wrong)


1.4.5
2023.03.29
click to download

  • fix metronome playing over PO sync
  • fix PO sync resetting when triggering sequencers 
  • fix vocoder muted by panning right in tape screen

  • fix reverse tape trick not working when in midi sync mode
  • fix dbox note stealing bug


1.4.2
2023.01.12
click to download

  • new vocoder synth engine
  • start armed tape recording on external MIDI
  • mtp: allow aiff and aifc files for patches



1.3.7
2022.12.19
click to download

  • fix patch switch crash
  • fix shift+T1 crash
  • fix tape switch crash
  • fix lost sampler recordings

  • fix patch drop
  • fix minor ui bugs
  • keep track level when pressing drum/synth while tape is running


1.3.2
2022.11.17
click to download

  • keyboard velocity sensitivity
  • mono / stereo setting for line in
  • pre tape pan
  • import wav files via mtp
  • pre scan for best fm transmit frequencies
  • adjust tape speed to external clock

  • sync transmit frequency with OB–4
  • finger sequencer velocity support
  • fixed arpeggio bug with "each" setting
  • fixed lift/drop crashes
  • misc crash fixes
  • misc ui fixes

read more

1.2.9
2022.09.09
click to download

  • fix random factory reset bug when shutting down with usb device connected
  • fix noise when dropping multitrack tape to samplers
  • fix arpeggio crash



1.2.7
2022.09.02
click to download

  • fix bug that could cause key presses not to register
  • fix crash when switching between certain patches
  • fix crash when deleting the last drum snapshot
  • fix patch not saved after drum key lift/drop

  • multi-track tape drop could insert old audio without clips
  • support full external midi range in arpeggio sequencer
  • improved midi sync

1.2.5
2022.08.31
click to download

  • per-tape mixer settings
  • unlimited lift / drop length
  • increased endless sequencer steps to 999
  • velocity support in arpeggio and hold sequencer
  • allow deleting snapshot patches
  • lift tape head with blue encoder in tape screen
  • add lift and drop to M1 / M2
  • tap T1-T4 quickly to switch tracks without soloing
  • lifting multiple tracks from tape to sampler keeps mute & pan info
  • lift / drop clipboard survives power-off
  • don't normalize when dropping audio into synth / drum sampler
  • pitch bend did not go back to neutral position
  • fix MIDI clock glitch when pressing play
  • audio headphone output would not start with some devices
  • fix deleting active tape in tape browser
  • tweak drum midi velocity response
  • mtp improvements and fixes
  • other bug & crash fixes
  • ui improvements

1.1.6
2022.06.16
click to download

  • fix bug where input signal could get distorted
  • fix crash when renaming patches with mtp
  • fix crash when pitching down synth samples very low

  • convert lfo amount on older synth patches to correspond to engine changes
  • fix occasional hanging midi notes when switching octave

1.1.4
2022.06.01
click to download

  • filter accidental encoder clicks
  • 30% lower keyboard latency
  • new max brightness color boost (turn to 125%)
  • low battery warning tweaks
  • new disk mini seek

  • fix: reverse loop with start at tape start
  • crash fixes
  • gfx tweaks



1.1.2
2022.05.12
click to download

  • mtp/disk improvements & fixes
  • improved ble connection stability
  • low battery warning popup
  • delayed power switch setting
  • enable compressor and limiter on fm transmitter
  • interpolate master compressor settings
  • add battery info to system settings
  • synth: show user samples on shift+T1
  • scroll through preset names too long to fit
  • transmit OP–1 fm radio station name
  • autoset system clock from fm radio