My ASUS laptop originally had a sound card driver in Windows 7 that included a technology called ASUS Sonic Focus. Its principle involves adjusting the audio equalizer to create a psychological Dolby surround effect, making listeners perceive the sound as spatial. After enabling Sonic Focus, I found the audio quality significantly improved. (I'm not an audiophile.) However, on Ubuntu, there's naturally no Sonic Focus – ASUS wouldn't bother supporting such a rapidly evolving system. Dolby and SRS also don't provide Linux support, so the open-source community developed Extra Stereo to replicate these features. There's also Crystalizer, which enhances high-frequency loudness for clearer sound. Those who've used Creative Sound Blaster or X-Fi cards should be familiar with this. Meanwhile,...