Loper · Sound & music

Open .sesx files on your Mac.

.sesx

Audition multitrack sessions in XML: sample rate, tracks, clips and their file references.

Loper is a free, minimal editor for macOS that opens Adobe Audition session (.sesx) 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.

Podcast_Ep12.sesx opened in Loper: Adobe Audition session (.sesx) with color-coded XML
Show the file as text
<?xml version="1.0" encoding="UTF-8" standalone="no" ?><sesx version="1.9">  <session appBuild="25.0" duration="2880000" sampleRate="48000">    <tracks>      <audioTrack id="10001" index="1">        <trackParameters trackHeight="134"><name>Host</name></trackParameters>        <audioClip clipAutoCrossfade="true" endPoint="1440000" fileID="0" name="Host_Mic" startPoint="0"/>      </audioTrack>    </tracks>  </session>  <files><file absolutePath="/Volumes/Audio/Ep12/Host_Mic.wav" id="0"/></files></sesx>

How to open .sesx files

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