As Justice Laskin wrote in United States District Court, there are two kinds of evidence:
"... viva voce testimony and ... testimony by way of documentary evidence."
In law, evidence and testimony are often used interchangeably as there are two forms of testimony: oral and documentary.
In parliamentary procedure, a viva voce vote also signifies a vote taken by word of mouth as in "all those in favour say 'yea'", as distinguished by a written vote, also known as a ballot.
REFERENCES:
United States District Court, Middle District of Florida v. Royal American Shows Inc. 1982 1 SCR 414 (Supreme Court of Canada)