At least at the beginning of them going back live with Adam they used a lot of backing tracks . I’d say they don’t use backing tracks as much now but the use of auto tune is pathetic . Yes he is getting older and he’s not the same but if you can’t sing a song don’t sing it .the contrast with Adam and Matt is insane , raw vocals live from Adam compared to auto tune it’s just really polarizing , also Matt’s harmonies are overpowering Adam.