I’m posting this in Cubase 12, but I’m sure belongs to all Cubase versions. I don’t think it’s a bug, it’s just me, gathering information to understand ‘the issue’.
I’m currenly making a cover of a song and I’m only using some midi (with VST instruments of course) and some audio files. The audio files don’t go inside a .cpr file, so that can’t be it, but the question is:
What makes a CPR file big? It jumped from 2,9MB to 350MB to 562MB in a matter of hours.
So, what’s inside a CPR file that can make it so big?
The current sates of all the plugins are saved in the CPR files. Some plugins have a lot of state data that Cubase needs to save.
And of course it’s quite conceivable that a plugin has some sort of bug that cases unnecessary use of space when saving a project file.
Hunting that down strikes me as likely tedious, since one would probably have to experiment with having different plugins eliminated from the project and examining the effect of that. (If there’s a trick to find out which plugin requires how much space in the .CPR file, I’m not aware of such a trick.)