WD-40 has water in it. Not good to lubricate long-term and not for places that are not easily accessible.
Which sound card do you have now? I am still running Creative Sound Blaster Live.....two-channel stereo with old, junker speakers but since I am near deaf I cannot hear all of the highs or lows anyway. LOL
I also got a Creative Soundblaster. It's a Recon 3D Fatality Professional series with THX.
I have a Bose sound system on my computer..2 speaker & a sub woofer which is kind of old..about 6 or 7 years, but it still sounds good to me.
My hearing is still good but I really need to get the eyes checked out. I've been using drugstore readers which are fine but I think my far vision is not quite as good as it once was.