From the Portal Demo Song
blog, where this trick was used:
Bill Jackson – Cakewalk: “So, it’s a pretty simple trick in Melodyne. Jimmy sent me the raw vocal track as a .wav. I opened that file in Melodyne Editor and typed CTRL+A to select all. I grabbed the “Pitch Modulation Tool,” which is primarily used to manipulate vibrato. I double-clicked the selection to eliminate all vibrato, creating flat lines. This resulted in sudden robot voice. Then, I carefully listened through and adjusted especially unnatural sounding words and phrases by selecting them explicitly and using the pitch modulation tool to click and drag up, introducing a subtle amount of vibrato back in.”