Please note that I don't use just an auto tune program, press a button and let it do automatically the work. I edit manually every single note of your vocal track. Also, I will not change the melody of your vocals, unless some notes are completely out of tune.
For best results, please export your vocal tracks in wav format before sending them to me.
Also, along the vocal track you should send me the an export with the rest of the track, so that i have a guide to work on.