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Keith McMillen Instruments MIDI Expander  

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Keith McMillen Instruments

Enables you to use your KMI Softstep as a controller for your external MIDI hardware.

The Keith McMillen Instruments SoftStep MIDI Expander is a must-have accessory that enables you to use the SoftStep to control your MIDI world. The MIDI expander provides a MIDI In and a MIDI Out that show up on your computer as SoftStep MIDI Port 2.

Program your SoftStep with our easy-to-use control mapping software, plug in your MIDI rig, and you're ready to send and receive data to external MIDI hardware. Needed to use the SoftStep without your computer in standalone mode.

Customer Reviews

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Keith McMillen InstrumentsMIDI Expander

(based on 2 reviews)

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Reviewed by 2 customers

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Works ... but disappointed

By Darknut

from Arkansas

About Me Professional Musician

Verified Buyer


  • Easy To Use
  • Functional
  • Good Quality


    Best Uses

      Comments about Keith McMillen Instruments MIDI Expander:

      Does the job to interface the 12 step to legacy midi but the extra legacy midi input is basically useless as it will only pass thru very limited midi.

      Would have been very handy if it was a full midi port

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      (3 of 4 customers found this review helpful)


      Use The Softstep, 12 Step or QuNeo to Control Hardware

      By Paul Gaeta

      from Asheville, NC

      Comments about Keith McMillen Instruments MIDI Expander:

      This product is very simple to use and lightweight / portable. It allows you to expand the functionality of the already very powerful Keith McMillen line to controller external hardware such as synthesizers, other midi controllers, samplers, effects units and more.
      This is a simple unit that allows you to expand your Keith McMillen midi controller(s) functionality. With it you can control outboard hardware, such as synths (Minotuar anyone) and samplers, as well as effects units and more.
      I've had mine for about a year now and it's been very solid, with no issues. I have no complaints and find it's small size and light weight to be a real boon on the road. Fits into a small bag and is metal - super durable.
      This product is very inexpensive and allows you to greatly expand the functionality of the Keith McMillen line, such as the 12 Step, QuNeo, and SoftStep.

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