Recently I found this so called "windows sound driver enhancer" and I feel it has improved sound quality in my old PC w/integrated audio. Is this a placebo effect or does it really improves music/sound generation.

http://www.asio4all.com/

I posted this here because I thought it is of interest, but if deemed improper please delete it m(_ _)m

My understanding is that ASIO4ALL simply allows apps that use ASIO to talk to the sound card (it's another API like WaveOut and DirectSound) to work when you have a card that doesn't have native support. As far as I know no emulators or games even attempt to use ASIO, only music-production stuff like Acid Pro, ProTools, Reason, and Cubase. So it's likely strictly placebo.