Reason 4.0.1 è un update di manutenzione che risolve alcune problematiche minori, in risposta al feedback degli utenti che hanno ricevuto la versione 4 di Reason.


  • More tolerant error handling when loading custom fonts.
  • Selected installer language was not used when upgrading from 3.0, this is now fixed.
  • We have improved the error handling when copying Remote maps and codecs during start up.
  • All sample players (NN-XT, NN-19, Dr Rex and Redrum) - High Quality Interpolation is now enabled by default.
  • Improved handling of mono/stereo connections while auto-routing.
  • Dragging devices to the rack from the tool window only worked with the top-most window, now it works with any window.
  • More robust error handling during startup, avoiding certain timing problems in Windows.


  • Automation type for Dr Rex transpose parameter was continuous - changed this to stepped.
  • In certain situations Command-A did not work properly on Mac OS X.
  • Notes with same Start or End position could change the play/stop order randomly. This could only be noticed while playing chords on a monophonic device. This is now fixed.
  • Fixed note trig queuing for extremely short notes. This was causing phased effects when doubling clips exactly on two layers.
  • "Reset automation override" could default to wrong value.
  • Pressing Stop the second time moves the song position locator to previous start position, it could sometime move to song start if the locator had been repositioned during playback.
  • MIDI import of file with redundant note information is now filtered.
  • Uncombining a Combinator deleted the Combinator's sequencer track. This is now fixed.
  • Reason could take a long time to respond when entering extreme numbers in position editors.
  • Overriding parameter automation by loading a patch did not always indicate automation override. Now fixed.

Improved workflow in sequencer

  • If a clip is selected in Arrange mode and you switch to Edit mode, the clip is automatically opened for editing. This only happens if the clip is on the current track.
  • You can press [Esc] to close an open clip in Edit mode. If the clip was opened from Arrange mode, this will automatically switch the sequencer back to Arrange mode.
  • Changed Zoom behavior: The program now zooms on the song position locator if it's in view. If not, it zooms towards the left edge of the current view.
  • Drag and drop now also works in left-handed mouse configurations.
  • Text-entry of a tempo with a decimal in the transport panel or when editing the static value was counter-intuitive: Typing something like '120.5' or '120.05' delivered 120.005. This is now fixed.
  • Added label to velocity and pattern lanes.


  • Added Remote support for:
  • Akai MPD24
  • Akai MPD32
  • Akai MPK49
  • Edirol PCR-300/500/800
  • Frontier Design Group Alpha Track
  • Line 6 KB37
  • M-audio ProjectMix I/O
  • M-audio Axiom 25/49/61
  • M-audio Oxygen 8 v2
  • Fixed a performance problem with the Remote Override "learn" feature.


  • Performance problem when having many ReFills installed.
  • Reason could crash when saving if there was more than 300 ReFills installed -fixed.
  • Better error handling while file searching in browser.
  • Broken search for missing sounds in songs created with OS hide extensions enabled - fixed.
  • Changed wording of memory usage in patch browser to avoid confusion.
  • Saving patches in Reason version 4 and ReFill packer had a backward compatibility issue - fixed.
  • Sometime the static value was not imported correctly when loading old songs - fixed.
  • If an opened patch or sample had been moved or deleted while Reason was running this could prevent the user from saving the song - fixed.
  • Reason could in certain cases unexpectedly quit when saving on Mac OS X - fixed.


  • If many devices in a Combinator were programmed to switch "Receive notes" on/off in the Combinator's programmer, some devices responded slower than other devices. This is now fixed.


  • Increased the buffer size of Malström's Comb filter, this fixed problems with high sample rates.


  • Fixed velocity CV and knob/automation lag when in random mode.
  • Fixed broken velocity change of tied single note when in ON-mode.
  • "Render Arpeggio To Track" was broken when pattern automation lane was enabled.
  • New shortcuts: Shift pattern right: Ctrl + J (Win) or Cmd + J (Mac) Shift pattern left: Ctrl + K (Win) or Cmd + K (Mac) Random sequencer pattern: Ctrl +R (Win) or Cmd + R (Mac) Alter Pattern: Ctrl + T (Win) or Cmd + T (Mac)


  • Thor's sequencer have new shortcuts:
    Shift sequencer pattern right: Ctrl + J (Win) or Cmd + J (Mac)
    Shift sequencer pattern left: Ctrl + K (Win) or Cmd + K (Mac)
    Randomize pattern: Ctrl +R (Win) or Cmd + R (Mac)

Audio Card

  • Reason could go silent if the sample rate was changed in Windows Vista or on an aggregated audio card driver in Mac OS X. This is now fixed.


  • Fixed a ReWire problem with FL Studio, making it more robust.
  • Made Ableton Live and Reason ReWire connection more robust.