3D Music Player Pro gives you some interesting options for enriching the sound of your music, and it does a pretty good job with only a few flaws. Upon launch, use the plus-sign button in the upper left to add a couple of songs from your music library and test the various effects. Once they're queued up, you can play a song and then touch the 3D Sound button to hear the basic audio enhancements in the app. We noticed a difference immediately in our testing, with the app adding a much fuller and warmer sound to our music.
Beyond the main button, there's much more to play around with in 3D Music Player Pro. Hit the gear icon in the upper right to bring up the settings screen. From there you can fiddle with all of the app's sound enhancements individually and turn them on and off to hear the results. The 3D.STEREO control lets you turn on surround sound and adjust bass output for a 3D stereo listening experience. The G.EQ control lets you adjust the levels for songs like a regular equalizer, and the ON.STAGE control gives you three options simulating the sound and reverb effects of playing the song in a studio, a concert hall, or a stadium.
3D Music Player Pro's features are fun to play around with, and each of the effects definitely enhances the way your music sounds, but the app is not perfect. When we added our entire music library, the app seemed to choke on the approximately 8GB of music. After a restart we were able to get all of our music to show up, but 3D Music Player Pro doesn't share the iPod's ability to search through your music quickly (think of the alphabetized strip of letters on the right of your iPhone music library that allows you to jump to different parts of the alphabet). This means that you'll spend a lot of time scrolling to listen to specific songs. An even bigger issue is that when you quit the app and relaunch, your previously uploaded music will no longer be listed. This is definitely a bug the developer must have overlooked and will hopefully be fixed soon.
Overall, 3D Music Player Pro is a unique app that lets you mess around with audio settings to give your music a much warmer sound. With the right bug fixes and some slight interface enhancements, this app will be a great way to get more out of your music.