Release notes: Repro

Updated with every release (beta versions and latest builds not included)

August 10, 2021

Repro 1.1.2 (revision 12092)

Native M1 ARM support


  • Native support for Apple Silicon chips (M1)
  • macOS Big Sur compatibility
  • Improved GUI performance on Mac
  • Support for Oddsound MTS-ESP
  • Improved handling of junction links on Windows
  • Improved multi-core performance on Mac
  • Preset tags modernized
  • Preset list scroll direction preference
  • Improved soundset installation
  • Preset browser bank name support
  • Mod matrix modifiers now on the GUI (previously only available via context menu)

Fixed Bugs:

  • Fixed Velvet FX unnecessarily reporting six samples latency
  • Fixed "set as default view" not working anymore
  • Fixed notes starting on same time stamp but different MIDI channel might not play
  • Fixed playback issue when switching from an arp to a sequencer preset
  • Fixed Cakewalk setting instance parameters to default on project reload
  • Fixed crash when loading script presets (e.g. Randomizer)
  • Fixed rare crash on project reload
  • Fixed audio clicks when switching presets
  • Various framework fixes and improvements

Known Issues:

  • Context menus need plugin focus to work (Apple issue)
  • Issue with Repro-5 S+H clock in FL Studio

Special Notes:

  • AAX support on Mac removed temporarily (will come back in next update)
  • Updated minimum requirements, CPU needs to support SSE4.2 instruction set
  • Linux: minimum required glibc version is 2.28 (otherwise plugins won't show up)
  • Multi-core support is not optimized for Apple ARM chips
  • macOS 32-bit support discontinued

January 27, 2020

Repro 1.1.1 (revision 9669)


  • Mac installer notarized (Catalina)
  • Improved OSC A rectangle sound
  • New user defined MIDI CC sources replace fixed expression and breath modulation
  • Improved handling of 14-bit MIDI CC assignment
  • Browser: preference for scanning on startup
  • Browser: file icons added
  • Browser: file system drag & drop support
  • Browser: import/export of favourite assignments
  • VST3 MIDI-learn working
  • Windows installer improvements
  • Full UTF-8 support for installation paths
  • Mac installer improved to prevent permission problems
  • Improved GUI response on some Macs (sluggish GUI)
  • Windows GUI performance improved (less CPU load with open GUI)
  • Sustain pedal now working according to standard (0-63 = off, 64-127 = on)

Fixed Bugs:

  • Fixed an issue with dialogs appearing transparent in Cubase 10.5 and Logic
  • Fixed LFO host sync switch issue (crashing or muting the plugin)
  • Fixed rare crash when sending MIDI program changes
  • Fixed an issue with polyphonic aftertouch

Known Issues:

  • Randomizer presets crash Repro-1
  • FL Studio: sample & hold rate in Repro-5 behaves erratically
  • Parameter automation issue in Ableton Live
  • Context menus need plugin focus to work (Apple issue)
  • The "set current as default view" option for tabs is missing

Special Notes:

We improved the Windows installer to prevent wrong installations and permission issues. Please check the suggested installation paths during installation.

The mod matrix now includes modifiers, but this is still work in progress, e.g. the list of sample & hold sources is not finalized yet.

December 15, 2017

Repro 1.1 (revision 6794)


  • Renamed to Repro
  • Added Repro-5 polyphonic synth
  • All new preset browser
  • Added microtuning support
  • Added velocity scaling for envelopes
  • Added filter envelope inversion jumper
  • New filter chip Poly available in Repro-1 (from Repro-5)
  • More parameters available for automation by host
  • Plug-in format and OS information visible next to revision number
  • Preset browser On open expand to command has new none option
  • Windows installer now certified
  • Init preset can be loaded from Data Display

Fixed Bugs:

  • Fixed unsorted folders and presets when using APFS in macOS High Sierra
  • Fixed potential Cubase crash (macOS only)
  • Fixed issue where VST3 version does not remember preset name in Data Display (Windows only)
  • Fixed issue where notes mysteriously disappear in some hosts
  • Fixed issue where pitch jumps to highest note after release of sustain pedal
  • Fixed issue where sequence resets to first step with each note when in Key mode
  • Improved playability of sequencer in Key mode
  • Fixed issue where VST3 version does not update some graphics while recording sequences
  • Fixed issue where sequence does not restart from step one when using clear while recording
  • Fixed issue when using a slow clock the last step does not stop immediately after releasing key
  • Sequencer pattern 1/2 now switches at end of current sequence
  • Fixed wrong arpeggiator / sequencer rate when using different sample rates for project and rendering
  • Fixed issue where notes played legato even if they did not overlap
  • Various small fixes and improvements

Known Issues:

  • Repro-1 randomizer presets crash Repro-1 in version 1.1. Please remove until further notice.
  • FL Studio S&H rate in Repro-5 behaves erratically
  • Parameter automation issue in Ableton Live
  • Auto-tag features preference not working
  • MPE issues with modwheel and pitchbend
  • Bug when using polyphonic aftertouch
  • Switching HQ creates a temporary DC offset. This is by design.

Special Notes:

Warning. A last-minute bug appeared which can lead to a crash in the VST3 version when using the LFO sync mode switch (in Repro-1 and Repro-5). In other plug-in formats, this can lead to the plug-in falling silent or sounding wrong.

Some small issues in preset browser:

  • In a few hosts, a "send all keys to plug-in&qupt; option needs to be enabled
  • Sonar hangs when using Tab key in search field (Windows only)
  • Issue with mouse and search field in Pro Tools (Windows only)
  • Short flickering while entering text in search field (Windows only)

December 2, 2016

Repro-1 1.0 (revision 5332)

Initial release