As nouns the difference between contralti and contralto

is that contralti is while contralto is (music) the lowest female voice or voice part, falling between tenor and mezzo-soprano the terms contralto and alto refer to a similar musical pitch, but among singers, the term contralto is reserved for female singers; the equivalent male form is counter-tenor originally the contratenor altus was a high countermelody sung against the tenor or main melody.