Here are 4 audio files of a female vocalist. One is untuned the other 3 are tuned with Antares AutoTune, Celemony Melodyne 4 and Synchro Arts Revoice Pro 3.

Producer Paul Drew has taken time to go through each performance and use the manual tools to try and get the best possible results from all three software applications. Reverb was applied after tuning had been completed.

Which one do you prefer, vote in our listening test and then come back next week to find out which one is which.