Connecting a 32W653 to a Goodmans soundbar using 'Optical' works but I prefer volume control from the TV.  Using analogue through 'Headphones' works  but I have concerns about equalisation.  'Audio Out' shares the same jack socket as 'Headphones' and is variable.

Can anyone say whether 'Audio Out' would be a better flat, non-equalised signal?
Are the signal levels compatible?