SRS Audio Sandbox
Full user review
"Perfect audio supplement"
Simple but powerful software. Comes with music presets -- but there is an advanced controls tab for more options. Audio that is flat is given body. Easily accessible from the system tray and opens with media players (by default, I believe).
Sometimes when you turn it on or off, the speakers will pop.
This is the perfect complement to any speaker system. Bass is improved exponentially. Vocal clarity is improved. Sounds that would be otherwise indiscernible are brought to the forefront. And it's all done seamlessly. Many patented SRS technologies -- SRS WOW HD, SRS TruSurround XT, etc. -- are packaged into this affordable software. Word of caution: use only when audio quality is mediocre. It's powerful software, but you have to know when to use it ;) Too much loudness can shorten the life of your speakers. But all in all, SRS and Dolby can be mentioned in the same breath!