loper

Loper · Sound & music

Open .mmp files on your Mac.

.mmp

LMMS songs in XML: tempo, tracks, instruments and patterns.

Loper is a free, minimal editor for macOS that opens LMMS project (.mmp) instantly and colors every part of the file, so you find the value you need at a glance and can fix it right there. No IDE, no project to load, no gray wall of text.

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beat.mmp opened in Loper: LMMS project (.mmp) with color-coded XML
Show the file as text
<?xml version="1.0"?><!DOCTYPE lmms-project><lmms-project version="31" creator="LMMS" type="song">  <head bpm="96" timesig_numerator="4" mastervol="100"/>  <song>    <trackcontainer type="song">      <track name="Kick" type="0" muted="0">        <instrumenttrack vol="100" pan="0">          <instrument name="audiofileprocessor"/>        </instrumenttrack>      </track>    </trackcontainer>  </song></lmms-project>

How to open .mmp files

  1. Download Loper (free, Apple silicon, signed and notarized) and move it to Applications.
  2. Double-click your .mmp file, drag it onto the Loper window, or right-click it and choose Open With › Loper.
  3. Want every .mmp file to open in Loper? Choose Loper › Make Loper the Default Editor….

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