When I first bought my HP Envy laptop, it had a nreally annoying sound issue. It's hard to explain, but I'll just say the main two problems.
Firstly, it's as if the equalization of sound was screwed up, because in parts of song that should be soft in volume, they're actually quite loud like the rest of the song and this resulted in static being heard in the background during these soft pars.
The second mian issue I'd noticed was that lowering of the volume of specific sound-playing programs didn't do anything. After turning the volume of youtube all the way down to just above naught, the volume of youtube eventually crawled back up to full volume.
Overall, the sound of the laptop just didn't sound good.
I've only observed this with headphones on. I've listened to the laptop with different headphones and with different media-playing programs and I've concluded that it's the actual sound of the laptop that is screwed up.
The weirdest thing is that after I restarted my computer to update to Windows 8.1, the sound actually became normal. I couldn't hear any background noise in a song that I shouldn't have and the volume of programs never returned to normal after changing the volume.
Unfortunately, the sound of the laptop has returned to how it was when i first got it, after I restarted my computer to finish an iTunes update (which I did yesterday). Knowing that the sound was actually fine for while makes me sooooo angry that it's terrible again and I desperately need help to return it to how the sound should...sound!