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M! free download for Mac


Version 3.0.2

Scaling application for pipe organ builders.

M! overview

M! has all the features of the successful scaling slide rule, used the world over by organ builders, experts, and amateurs. In addition, M! offers straight-forward intuitive usage and all the advantages of modern computer programs.

  • Easiest diagramming of scalings
    • graphically (with mouse or pad).
    • calculated (broken scales, addition constants, etc.).
  • Comfortable analysis of existing scalings
    • numerical input of scalings.
    • import of scalings form other programs.
  • Clear management of scales
    • freely arranged stop list.
    • multiple masking of scale curves on the graph.
    • simple placement of commentary on the graph.
  • Multiple readout possibilities
    • graphs of scales in various combinations.
    • spreadsheets of all measurements (deviance from mean, diameter, width of mouth, theoretical length, end compensation and much more) for values between C1 and c61 (also selectively, e.g. C-F#).
    • export of spreadsheet as CSV
    • export of diameter scales as 2D DXF
    • copy and paste of spreadsheets (or parts thereof) in text programs.
    • printing of scales (graphics and spreadsheet)
    • Use as a documentation medium
      • M! is available for the most important platforms (Windows and iOS coming soon).
      • All documents created with M! can be opened by any of these platforms. The data files are byte compatible.

What’s new in version 3.0.2

Updated on Sep 18 2015

Version 3.0.2:
  • Fixed an issue with changes in the document settings (refreshing the document's content)
  • Fixed an issue with formulas in free columns (double letter references)
  • Initial window position fixed





6.1 MB



App requirements

  • Intel 64
  • OS X 10.10 or later
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