Flap extension sounds shouldn’t be anywhere as loud as the engines. I’m assuming unless in a small aircraft like a C172, the sounds can’t possibly be that loud. I’m no pilot but I don’t think you could hear flaps extending while in the A380 cockpit. So I’m requesting that there be a slider for “flaps” separate from the SFX slider that would allow one to either tone down the sounds or completely silence them.
Here again to ask for more audio customisation. We need to be able to fine tune sound beyond the basic ATC and SFX adjustments.