This came to good use already @reyna as I now understand how to upload files. So what I did was make a “Image” post (as I want to be able to have a visual header) and attached a zip-file with an audio production asset.
As state above though, this will start to pack all my posts into the “Images” post type only to get the ability to have visuals with my content. All post types should have an image header option! And really, having a download post type should be relevant for many creators on this platform.