A Free Solution For DAW Global Microtuning

The MTS-ESP Mini plug-in loads .scl, .kbm or .tun files and retunes all connected MTS-ESP client plugins with the selected tuning. Instead of updating dozens of virtual instruments the tuning can be changed from a central location, reducing the time it takes to get everything in tune and leaving more time for you to create. Best of all, it’s completely free!


  • Import .scl, .kbm and .tun tuning and mapping files
  • Automatically update tunings of MTS-ESP aware plugins
  • Stores and recalls tuning in the DAW session
  • Bypass button to return to 12 TET instantly
  • Tiny CPU use
  • Simple, ergonomic interface
  • Mac Retina and Windows HiDPI support
  • FREE!

Windows System Requirements

  • Vista / Windows 7 / Windows 8 / Windows 10
  • 32 bit or 64 bit
  • A host that supports VST, VST3 or AAX plug-ins.

Mac OS System Requirements

  • OS X 10.7 or newer, including Catalina(10.15) and Big Sur(11)
  • 64 bit only
  • A host that supports VST, VST3, AU or AAX plug-ins.
  • Intel or ARM Mac

1.05 -> 1.06 (2021-08-18)

  • Fix broken mapping with .scl import.
  • Reset MTS library to 12-TET on instantiating.

1.04 -> 1.05 (2021-08-05)

  • Support linear .kbm files when loading .scl and .kbm together.

1.03 -> 1.04 (2021-06-22)

  • Fix MTS-ESP tuning updating if session loaded with bypass automated on.

1.02 -> 1.03

  • IPC support for MTS-ESP.

1.01 -> 1.02

  • Relocate MTS-ESP library to Common Files folder on Windows.

1.00 -> 1.01

  • Fix connection info disappearing.

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