I think what your questioner might have meant is mummers. In New Orleans, during Mardi Gras, and in other cities, most notably Philadelphia, there are huge masks and elaborate costumes paraded once per year, along with music, etc.

I did not find a direct reference to "mummers" in New Orleans, but did find many for places elsewhere, from Oregon, to the UK. For some vivid photos of the costuems and historical info from Mardi Gras in New Orleans, click here.

I did not find a specific "mummers" reference to the famous jazz processional bands of New Orleans which traditionally play for funerals, but that is what came to mind right away when I read your question.

Hope this helps.

katlaughing