Hi, and welcome to Wikipedia!
I hope you'll enjoy being here, and if you're especially interested in singing check out Wikipedia:WikiProject Opera. I noticed your recent edits to the baritone section of Voice type which added perfectly plausible detail, but it now looks like the more precise info on range extention is supported by the McKinney reference. Is this so? If not, another source would be fine! All the best, Sparafucil (talk) 00:33, 13 April 2009 (UTC)