Add proof of concept test for `mixer`
Add proof of concept test for `mixer`

agdsn/sipa,MarauderXtreme/sipa,MarauderXtreme/sipa,agdsn/sipa,lukasjuhrich/sipa,agdsn/sipa,lukasjuhrich/sipa,lukasjuhrich/sipa,lukasjuhrich/sipa,agdsn/sipa,MarauderXtreme/sipa