mscz file format
I am trying to make changes in a number of mscz file programatically. I am using a Macbook Pro with Monterey 12.6 and Musescore 3.6.2.
I can uncompress a mscz file (after changing the extension to zip) using the standard zip procedure. This produces a folder including a number of things including an mscx file that can be edited and opened directly in Musescore. However if I then zip the folder, even without touching any files in it, I don't recover the original mscz file - the zipped file is larger and won't open in Musescore.
Does Musescore use a non-standard compression procedure? If so is there any way to access the procedure?
Alternatively, can someone explain what is going on please?
Thanks for your help.