Ive come across this weird problem today I recorded an acoustic guitar in mono ,duplicated the track , panned the original track to the left and the duplicate to the right ( as normal ) then I delayed the duplicate track until it sounded sweet and check the correlation which told me everything was good ( 0 ) . Brought the rest of the tracks back up and decided at this point to mix down . Now when I play the mix down track back only the original track on the left is playing . it’s very strange as im pretty sure it’s not phase cancellation due to the delay on the duplicate track .
Anyone come across this behaviour or am I just being a right idiot as normal ?