.. _filetypes:

File Extensions Associated with System Optimiser
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**Project Files**

System Optimiser project files that contain the entire project - the venue design plus the loudspeaker design, have the extension:

    **.cvop**

On macOS and Windows, .cvop files are associated with System Optimiser, so double-clicking one opens it directly. Note that opening a file this way replaces the project in the running System Optimiser window immediately, without an unsaved-changes prompt.

**Layer Files**

System Optimiser :ref:`layer<usinglayers>` files that contain just the venue design, or a selective export of a number of :ref:`layers<usinglayers>`, have the file extension:

    **.cvlf**

**Loudspeaker Source Files**

System Optimiser loudspeaker source files that contain just the loudspeaker data, or a selective export of these :ref:`loudspeaker sources<sourcetypes>` have the file extension:

    **.cvsf**