I use PlayerPro to play music on my smartphone.
In PlayerPro there are "Sound Effects", which are similar to the DSP manager. One of the sound effects is the Virtualizer.
When I enable the Virtualizer, even at 1%, it really changes the way the music feels. The audio becomes more echoey, and it sounds to me like I'm closer to the music. It gives me a live concert feeling.
When I played with the Virtualizer level I noticed there's a major difference between 0% and 1%. The difference from 1% to 100% is also noticeable, but it's not even close to the drastic difference when the Virtualizer is disabled compared to when it's enabled.
What does the Virtualizer do? What is it for, really?
How does the Virtualizer work?
How does this sound effect simulate a live concert sound (at least that's what it feels like to me)?