Stanley_4, in your case there would be time alignment because you have an older receiver that will not have any digital processing.
NeilM18, unfortunately in your case modern receivers virtually never offer the Tape Monitor feature, usually include some sort of digital processing delay, and you’ll encounter some time skews if you attempt to use the phono preamp built into the receiver, if any.
If you use a turntable with a built in or external preamp connected to PORT’s Line-In and play the turntable through PORT’s Line-Out connected to a receiver input, you’ll have time alignment between Grouped SONOS Rooms and receiver speaker output, however, you may need to disable the receiver’s digital processing. Often this is known as a receiver’s “Direct” option.