You can download the D2 Manual from the Cowon's website at
COWON America
1. JetEffect
1. Equalizer
· settings or manually set 5 Band Equalizers(EQ).
· Preset EQ settings include Normal, Rock, Jazz, Classic, Pop, and Vocal. Each preset EQ can be edited to match user’s preference.
2. BBE -- BBE is the sound effect that provides clear music.
3. Mach3Bass -- Mach3Bass is the base booster that enhances super low-end bass.
4. 3D Surround -- 3D Surround provides three dimensional sound effects.
5. Stereo Enhance -- Stereo Enhance enhances stereo effect for fuller sound quality
6. MP Enhance -- MP Enhance: Sound effect that compensate for missing sound segments
7. Pan -- Pan adjusts the left and right volume balance.
8. Play Speed -- Controls the speed of music playback.
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So, as you can see, the manual provides some explanation, but overall is rather lacking in describing the features. MET, along with JAZ, VOC, etc. are just pre-programmed EQ settings that users can easily choose to use that, in theory, improve the sound of the different genres. But that's debatable...
Personally, I leave my EQ settings on NOR (normal) and all other effects off. I don't mess with it because whatever tweak seems to improve one artist/album does a disservice to a different artist/album. I've never used the other effects because I didn't notice a big difference with my initial testing. I might tinker around eventually, but flat/off seems fine for me.
Finally, you'll find a lot more comments on the functionality of the D2 on the forums at
http://www.iaudiophile.net/forums/, the fan site for Cowon. There's an entire forum sub-section dedicated to the D2... and a thread that discusses member's preferred EQ settings. Hope this helps...
AC