Crescendo music score
File type: Audio and sound file
A .cdo file is a saved music score created with Crescendo, a free music composition and notation program for Microsoft Windows.
It stores the score so it can be reopened and edited in Crescendo.
Found 2 different file type records with the same cdo filename suffix.
File type category:
Audio and sound file
Date updated: October 16, 2026
The cdo file extension is associated with Crescendo, a free music composing application and music score editor from NCH Software for Microsoft Windows.
A .cdo file contains a saved music score, including musical notation, tempo and score layout. It is the native working format used by Crescendo for editable scores.
The format is intended for use with Crescendo rather than as a general-purpose audio format. Crescendo can export the musical content to MIDI when a more widely supported format is needed.
Open the .cdo file in Crescendo on Microsoft Windows. Use Crescendo's Open command or open the file from Windows Explorer if the file association is configured.
If Crescendo is not installed, install the Windows version of the program and then open the file from within it.
Open the .cdo file in Crescendo and use its export options to save the score as a MIDI file. MIDI preserves musical performance data but not the original printed score layout.
File type category:
Various data file
Date updated: January 11, 2019
The cdo file extension is associated with CADAM (Computer Augmented Design And Manufacturing), a CAD designing tool originally developed by Lockheed now owned by Dassault Systemes.
The cdo file contains overlay data.
Use CADAM to open *.cdo overlay files.
Probably cannot be converted to anything else.
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