Would be very helpful since the sound can be very loud if the player accidentally has the volume turned up, and annoying if it's played frequently.

private _playSound = param [4,true,[true]];

if (_playSound) then
{
 private _sounds = ["3DEN_notificationDefault","3DEN_notificationWarning","3DEN_notificationWarning"];
 playsound [_sounds select _type,true];
};

Requires four lines of code and would expand the usability of this function quite a lot.