SoundBest steps you through a listening test, playing tones in the various sonic registers and asking you to click a button as you hear them. It uses your responses to determine how to equalize source material to best effect for your ears and audio setup. After the test, the SoundBest equalizer driver sits in the background, applying what it's learned.

The SoundBest test is not only dependent upon your ears; it's also dependent upon the frequency range of your speakers or headphones. If you change your speakers or their placement, or your headphones, or anything else about your audio setup, you'll need to run the test again. You can save the EQ settings from each test (you can test as much as you want) and switch between them at any so you can optimize for your various speakers, laptop, headphones, etc.

My results with SoundBest were mixed. The first version I downloaded wouldn't install, and another didn't make any noise. Even after SK Planet fixed these problems , the program still seemed to overcompensate drastically in the 250Hz and 500Hz frequency spectrums no matter what type of speakers I used for the listening test: Boston Acoustics CR11's, a tinny portable USB clamshell, or some large EPIs.

I literally heard no low frequency tones during any SoundBest test, though my own pure testing waves were easily distinguishable from 100hz on up. SoundBest provides stock presets such as ballad, metal, and hip-hop, which is what I stuck with. Alas, just about every music player in existence provides those and they're hardly worth the $35 that SoundBest will set you back.

Even if I'd gotten great results from SoundBest, I'd be hard pressed rationalizing the purchase. I'd much rather pay for something such as , which adds perceived space and depth though psycho-acoustics than plain old EQ. To be completely honest, on those days I'm not into listening to what the recording artist intended, I find the SRS Wow and TruBass in Windows Media Player, as well as the sound enhancement in iTunes, do just fine. And they're free.